TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Šljivić, Veljko
AU  - Pokusová, Marcela
AU  - Kandeva, Mara
AU  - Sun, HongGuang
AU  - Zadorozhnaya, Elena
AU  - Bobić, Ilija
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9556
AB  - The investigated metal-metal composites were produced by the compocasting process using the standard zinc-aluminium alloy ZA-27 as a matrix and titanium microparticles (particle size approx. 10 μm) as a secondary phase. The amount of Ti microparticles was 1 and 2 wt%. Small amount (0.5 wt%) of alumina nanoparticles (particle size 20–30 nm) is also used, as reinforcement. The aim of the presented research was to evaluate the possibility of producing such composites, as well as to see the effect of the addition of Ti microparticles and/or alumina nanoparticles on their microstructure, mechanical and tribological properties. Microstructure and worn surfaces analysis were performed by scanning electron microscope, and mechanical properties were analysed through the Vickers microhardness values. Tribological properties were determined on tribometer with line contact, under mixed lubrication conditions. Microstructural analysis showed that the distribution of Ti microparticles has been improved due to the addition of Al2O3 nanoparticles. This better distribution did not show any significant influence on the microhardness values or coefficient of friction values of the composites, but it induced higher wear resistance of metal-metal composites reinforced with Al2O3 nanoparticles. Better distribution and higher amount of Ti particles increased the surface area of the matrix that was protected with Ti particles during sliding and reduced wear. © 2021, American Foundry Society.
T2  - International Journal of Metalcasting
T1  - Production, Microstructure and Tribological Properties of Zn-Al/Ti Metal-Metal Composites Reinforced with Alumina Nanoparticles
DO  - 10.1007/s40962-020-00565-5
ER  - 

@article{
author = "Vencl, Aleksandar and Šljivić, Veljko and Pokusová, Marcela and Kandeva, Mara and Sun, HongGuang and Zadorozhnaya, Elena and Bobić, Ilija",
year = "2021",
abstract = "The investigated metal-metal composites were produced by the compocasting process using the standard zinc-aluminium alloy ZA-27 as a matrix and titanium microparticles (particle size approx. 10 μm) as a secondary phase. The amount of Ti microparticles was 1 and 2 wt%. Small amount (0.5 wt%) of alumina nanoparticles (particle size 20–30 nm) is also used, as reinforcement. The aim of the presented research was to evaluate the possibility of producing such composites, as well as to see the effect of the addition of Ti microparticles and/or alumina nanoparticles on their microstructure, mechanical and tribological properties. Microstructure and worn surfaces analysis were performed by scanning electron microscope, and mechanical properties were analysed through the Vickers microhardness values. Tribological properties were determined on tribometer with line contact, under mixed lubrication conditions. Microstructural analysis showed that the distribution of Ti microparticles has been improved due to the addition of Al2O3 nanoparticles. This better distribution did not show any significant influence on the microhardness values or coefficient of friction values of the composites, but it induced higher wear resistance of metal-metal composites reinforced with Al2O3 nanoparticles. Better distribution and higher amount of Ti particles increased the surface area of the matrix that was protected with Ti particles during sliding and reduced wear. © 2021, American Foundry Society.",
journal = "International Journal of Metalcasting",
title = "Production, Microstructure and Tribological Properties of Zn-Al/Ti Metal-Metal Composites Reinforced with Alumina Nanoparticles",
doi = "10.1007/s40962-020-00565-5"
}

Vencl, A., Šljivić, V., Pokusová, M., Kandeva, M., Sun, H., Zadorozhnaya, E.,& Bobić, I.. (2021). Production, Microstructure and Tribological Properties of Zn-Al/Ti Metal-Metal Composites Reinforced with Alumina Nanoparticles. in International Journal of Metalcasting.
https://doi.org/10.1007/s40962-020-00565-5

Vencl A, Šljivić V, Pokusová M, Kandeva M, Sun H, Zadorozhnaya E, Bobić I. Production, Microstructure and Tribological Properties of Zn-Al/Ti Metal-Metal Composites Reinforced with Alumina Nanoparticles. in International Journal of Metalcasting. 2021;.
doi:10.1007/s40962-020-00565-5 .

Vencl, Aleksandar, Šljivić, Veljko, Pokusová, Marcela, Kandeva, Mara, Sun, HongGuang, Zadorozhnaya, Elena, Bobić, Ilija, "Production, Microstructure and Tribological Properties of Zn-Al/Ti Metal-Metal Composites Reinforced with Alumina Nanoparticles" in International Journal of Metalcasting (2021),
https://doi.org/10.1007/s40962-020-00565-5 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Stanković, Miloš
AU  - Hvizdoš, Pavol
AU  - Bobić, Biljana M.
AU  - Stojanović, Blaža
AU  - Franek, Friedrich
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8829
AB  - Metal matrix composites are very inhomogeneous materials, and their properties depend on various parameters (production process, constituents, their interfaces, etc.). The influence of SiC microparticles (40 mu m) reinforcement and graphite macroparticles (200-800 mu m) addition on the mechanical properties of Al-Si A356 alloy, produced by compocasting, has been assessed using macro- and nanoscale measurements of hardness and modulus of elasticity. The Al makes over 90 wt% of the A356 alloy, so the nanoscale measurements were performed on different alpha phase regions on each material (core of alpha phase, eutectic alpha phase, and alpha phase near the phase boundaries alpha phase/secondary phases). The results showed that there is no direct correlation between mechanical properties on macro- and nanoscale. The nanoscale results also showed that the secondary phases (SiC and graphite particles) can have significant effect on the mechanical properties on the atomic level, i.e. in the alpha phase regions very close to the secondary phases.
T2  - Journal of the Brazilian Society of Mechanical Sciences and Engineering
T1  - Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale
VL  - 42
IS  - 3
SP  - 115
DO  - 10.1007/s40430-020-2197-6
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Ilija and Stanković, Miloš and Hvizdoš, Pavol and Bobić, Biljana M. and Stojanović, Blaža and Franek, Friedrich",
year = "2020",
abstract = "Metal matrix composites are very inhomogeneous materials, and their properties depend on various parameters (production process, constituents, their interfaces, etc.). The influence of SiC microparticles (40 mu m) reinforcement and graphite macroparticles (200-800 mu m) addition on the mechanical properties of Al-Si A356 alloy, produced by compocasting, has been assessed using macro- and nanoscale measurements of hardness and modulus of elasticity. The Al makes over 90 wt% of the A356 alloy, so the nanoscale measurements were performed on different alpha phase regions on each material (core of alpha phase, eutectic alpha phase, and alpha phase near the phase boundaries alpha phase/secondary phases). The results showed that there is no direct correlation between mechanical properties on macro- and nanoscale. The nanoscale results also showed that the secondary phases (SiC and graphite particles) can have significant effect on the mechanical properties on the atomic level, i.e. in the alpha phase regions very close to the secondary phases.",
journal = "Journal of the Brazilian Society of Mechanical Sciences and Engineering",
title = "Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale",
volume = "42",
number = "3",
pages = "115",
doi = "10.1007/s40430-020-2197-6"
}

Vencl, A., Bobić, I., Stanković, M., Hvizdoš, P., Bobić, B. M., Stojanović, B.,& Franek, F.. (2020). Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale. in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 42(3), 115.
https://doi.org/10.1007/s40430-020-2197-6

Vencl A, Bobić I, Stanković M, Hvizdoš P, Bobić BM, Stojanović B, Franek F. Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale. in Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2020;42(3):115.
doi:10.1007/s40430-020-2197-6 .

Vencl, Aleksandar, Bobić, Ilija, Stanković, Miloš, Hvizdoš, Pavol, Bobić, Biljana M., Stojanović, Blaža, Franek, Friedrich, "Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale" in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 42, no. 3 (2020):115,
https://doi.org/10.1007/s40430-020-2197-6 . .

TY  - JOUR
AU  - Bobić, Biljana M.
AU  - Vencl, Aleksandar
AU  - Ružić, Jovana
AU  - Bobić, Ilija
AU  - Damnjanović, Zvonko
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8491
AB  - Particulate nanocomposites with the base of ZA27 alloy were synthesized using an innovative route, which includes mechanical milling and compocasting. Scrap from the matrix alloy and ceramic nanoreinforcements were mechanically milled using the ball-milling technique, which led to the formation of composite microparticles. The use of these particles in the compocasting process provided better wettability of ceramic nanoreinforcements in the semi-solid metal matrix, which resulted in a relatively good dispersion of the nanoreinforcements in nanocomposite castings. The presence of nanoreinforcements led to the grain refinement in the matrix of nanocomposites. The mechanical properties of the synthesized nanocomposites are improved and compared with the properties of the metal matrix. The observed increase in the hardness of nanocomposites with Al2O3 nanoreinforcements (20–30 nm) was 6.5% to 10.8%, while the yield strength of these nanocomposites has increased by 12.2% to 23.2%. The hardness and compressive yield strength of the nanocomposites with Al2O3 nanoparticles (100 nm) increased by 1.7% to 8.0% and 2.3% to 8.3%, respectively. The increase in hardness of the nanocomposites with SiC nanoparticles (50 nm) was 11.5% to 20.6%, while the increase in the yield strength was 15.6% to 24.5%. The greatest contribution to the overall strengthening in the synthesized nanocomposites is the result of increased dislocation density due to the difference in coefficients of thermal expansion for the matrix alloy and nanoreinforcements. © The Author(s) 2018.
T2  - Journal of Composite Materials
T1  - Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting
VL  - 53
IS  - 15
SP  - 2033
EP  - 2046
DO  - 10.1177/0021998318817876
ER  - 

@article{
author = "Bobić, Biljana M. and Vencl, Aleksandar and Ružić, Jovana and Bobić, Ilija and Damnjanović, Zvonko",
year = "2019",
abstract = "Particulate nanocomposites with the base of ZA27 alloy were synthesized using an innovative route, which includes mechanical milling and compocasting. Scrap from the matrix alloy and ceramic nanoreinforcements were mechanically milled using the ball-milling technique, which led to the formation of composite microparticles. The use of these particles in the compocasting process provided better wettability of ceramic nanoreinforcements in the semi-solid metal matrix, which resulted in a relatively good dispersion of the nanoreinforcements in nanocomposite castings. The presence of nanoreinforcements led to the grain refinement in the matrix of nanocomposites. The mechanical properties of the synthesized nanocomposites are improved and compared with the properties of the metal matrix. The observed increase in the hardness of nanocomposites with Al2O3 nanoreinforcements (20–30 nm) was 6.5% to 10.8%, while the yield strength of these nanocomposites has increased by 12.2% to 23.2%. The hardness and compressive yield strength of the nanocomposites with Al2O3 nanoparticles (100 nm) increased by 1.7% to 8.0% and 2.3% to 8.3%, respectively. The increase in hardness of the nanocomposites with SiC nanoparticles (50 nm) was 11.5% to 20.6%, while the increase in the yield strength was 15.6% to 24.5%. The greatest contribution to the overall strengthening in the synthesized nanocomposites is the result of increased dislocation density due to the difference in coefficients of thermal expansion for the matrix alloy and nanoreinforcements. © The Author(s) 2018.",
journal = "Journal of Composite Materials",
title = "Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting",
volume = "53",
number = "15",
pages = "2033-2046",
doi = "10.1177/0021998318817876"
}

Bobić, B. M., Vencl, A., Ružić, J., Bobić, I.,& Damnjanović, Z.. (2019). Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting. in Journal of Composite Materials, 53(15), 2033-2046.
https://doi.org/10.1177/0021998318817876

Bobić BM, Vencl A, Ružić J, Bobić I, Damnjanović Z. Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting. in Journal of Composite Materials. 2019;53(15):2033-2046.
doi:10.1177/0021998318817876 .

Bobić, Biljana M., Vencl, Aleksandar, Ružić, Jovana, Bobić, Ilija, Damnjanović, Zvonko, "Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting" in Journal of Composite Materials, 53, no. 15 (2019):2033-2046,
https://doi.org/10.1177/0021998318817876 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Bobić, Biljana M.
AU  - Jakimovska, Kristina
AU  - Svoboda, Petr
AU  - Kandeva, Mara
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8357
AB  - Metal matrix nanocomposites (MMnCs) comprise a metal matrix filled with nanosized reinforcements with physical and mechanical properties that are very different from those of the matrix. In ZA-27 alloy-based nanocomposites, the metal matrix provides ductility and toughness, while usually used ceramic reinforcements give high strength and hardness. Tested ZA-27 alloy-based nanocomposites, reinforced with different types (SiC and Al2O3), amounts (0.2 wt.%, 0.3 wt.%, and 0.5 wt.%) and sizes (25 nm, 50 nm, and 100 nm) of nanoparticles were produced through the compocasting process with mechanical alloying pre-processing (ball milling). It was previously shown that the presence of nanoparticles in ZA-27 alloy-based nanocomposites led to the formation of a finer structure in the nanocomposites matrix and an improvement in the basic mechanical properties (hardness and compressive yield strength) through the enhanced dislocation density strengthening mechanism. Solid particle erosive wear testing demonstrated that these improvements were followed with an increase in the erosive wear resistance of tested nanocomposites, as well. Additionally, by analyzing the influences of type, amount, and size of nanoparticles on the erosive wear resistance of nanocomposites, it was demonstrated that there is an optimal amount of nanoparticles, which in our case is 0.3 wt.%, and that the presence of SiC nanoparticles and smaller nanoparticles in nanocomposites had more beneficial influence on erosive wear resistance. © 2018, The author(s).
T2  - Friction
T1  - Erosive wear properties of ZA-27 alloy-based nanocomposites: Influence of type, amount, and size of nanoparticle reinforcements
VL  - 7
IS  - 4
SP  - 340
EP  - 350
DO  - 10.1007/s40544-018-0222-x
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Ilija and Bobić, Biljana M. and Jakimovska, Kristina and Svoboda, Petr and Kandeva, Mara",
year = "2019",
abstract = "Metal matrix nanocomposites (MMnCs) comprise a metal matrix filled with nanosized reinforcements with physical and mechanical properties that are very different from those of the matrix. In ZA-27 alloy-based nanocomposites, the metal matrix provides ductility and toughness, while usually used ceramic reinforcements give high strength and hardness. Tested ZA-27 alloy-based nanocomposites, reinforced with different types (SiC and Al2O3), amounts (0.2 wt.%, 0.3 wt.%, and 0.5 wt.%) and sizes (25 nm, 50 nm, and 100 nm) of nanoparticles were produced through the compocasting process with mechanical alloying pre-processing (ball milling). It was previously shown that the presence of nanoparticles in ZA-27 alloy-based nanocomposites led to the formation of a finer structure in the nanocomposites matrix and an improvement in the basic mechanical properties (hardness and compressive yield strength) through the enhanced dislocation density strengthening mechanism. Solid particle erosive wear testing demonstrated that these improvements were followed with an increase in the erosive wear resistance of tested nanocomposites, as well. Additionally, by analyzing the influences of type, amount, and size of nanoparticles on the erosive wear resistance of nanocomposites, it was demonstrated that there is an optimal amount of nanoparticles, which in our case is 0.3 wt.%, and that the presence of SiC nanoparticles and smaller nanoparticles in nanocomposites had more beneficial influence on erosive wear resistance. © 2018, The author(s).",
journal = "Friction",
title = "Erosive wear properties of ZA-27 alloy-based nanocomposites: Influence of type, amount, and size of nanoparticle reinforcements",
volume = "7",
number = "4",
pages = "340-350",
doi = "10.1007/s40544-018-0222-x"
}

Vencl, A., Bobić, I., Bobić, B. M., Jakimovska, K., Svoboda, P.,& Kandeva, M.. (2019). Erosive wear properties of ZA-27 alloy-based nanocomposites: Influence of type, amount, and size of nanoparticle reinforcements. in Friction, 7(4), 340-350.
https://doi.org/10.1007/s40544-018-0222-x

Vencl A, Bobić I, Bobić BM, Jakimovska K, Svoboda P, Kandeva M. Erosive wear properties of ZA-27 alloy-based nanocomposites: Influence of type, amount, and size of nanoparticle reinforcements. in Friction. 2019;7(4):340-350.
doi:10.1007/s40544-018-0222-x .

Vencl, Aleksandar, Bobić, Ilija, Bobić, Biljana M., Jakimovska, Kristina, Svoboda, Petr, Kandeva, Mara, "Erosive wear properties of ZA-27 alloy-based nanocomposites: Influence of type, amount, and size of nanoparticle reinforcements" in Friction, 7, no. 4 (2019):340-350,
https://doi.org/10.1007/s40544-018-0222-x . .

TY  - JOUR
AU  - Veličković, Sandra
AU  - Stojanović, Blaža
AU  - Babić, Miroslav
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Vadaszne Bognar, Gabriella
AU  - Vučetić, Filip
PY  - 2019
UR  - http://link.springer.com/10.1007/s40430-018-1531-8
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8077
AB  - The optimization of wear rate of the nanocomposites with A356 aluminium alloy matrix, reinforced with silicon carbide nanoparticles, was performed through the analysis of the following influences: wt% of the reinforcement, normal load and sliding speed. The nanocomposites were produced by the compocasting process with mechanical alloying preprocessing (ball milling). Three different amounts of SiC nanoparticles, with the same average size of 50 nm, were used as reinforcement, i.e. 0.2, 0.3 and 0.5 wt%. Tribological tests were performed on block-on-disc tribometer (line contact) under lubricated sliding conditions, at two sliding speeds (0.25 and 1 m/s), two normal loads (40 and 100 N) and at sliding distance of 1000 m. Analysis of variance (ANOVA) was applied to determine the influence of different parameters on wear value of tested nanocomposites. It was noticed from ANOVA analysis that normal load, with 33.39%, is the most significant factor affecting the wear rate of nanocomposites. The amount of reinforcement, with 28.90%, also has a significant influence on the wear rate, while the influence of sliding speed, with 23.82%, is smaller. It was found that the prediction of wear rate, by using regression model and Taguchi analysis, were close to the experimental values. © The Brazilian Society of Mechanical Sciences and Engineering 2018.
T2  - Journal of the Brazilian Society of Mechanical Sciences and Engineering
T1  - Parametric optimization of the aluminium nanocomposites wear rate
VL  - 41
IS  - 1
SP  - 19
DO  - 10.1007/s40430-018-1531-8
ER  - 

@article{
author = "Veličković, Sandra and Stojanović, Blaža and Babić, Miroslav and Vencl, Aleksandar and Bobić, Ilija and Vadaszne Bognar, Gabriella and Vučetić, Filip",
year = "2019",
abstract = "The optimization of wear rate of the nanocomposites with A356 aluminium alloy matrix, reinforced with silicon carbide nanoparticles, was performed through the analysis of the following influences: wt% of the reinforcement, normal load and sliding speed. The nanocomposites were produced by the compocasting process with mechanical alloying preprocessing (ball milling). Three different amounts of SiC nanoparticles, with the same average size of 50 nm, were used as reinforcement, i.e. 0.2, 0.3 and 0.5 wt%. Tribological tests were performed on block-on-disc tribometer (line contact) under lubricated sliding conditions, at two sliding speeds (0.25 and 1 m/s), two normal loads (40 and 100 N) and at sliding distance of 1000 m. Analysis of variance (ANOVA) was applied to determine the influence of different parameters on wear value of tested nanocomposites. It was noticed from ANOVA analysis that normal load, with 33.39%, is the most significant factor affecting the wear rate of nanocomposites. The amount of reinforcement, with 28.90%, also has a significant influence on the wear rate, while the influence of sliding speed, with 23.82%, is smaller. It was found that the prediction of wear rate, by using regression model and Taguchi analysis, were close to the experimental values. © The Brazilian Society of Mechanical Sciences and Engineering 2018.",
journal = "Journal of the Brazilian Society of Mechanical Sciences and Engineering",
title = "Parametric optimization of the aluminium nanocomposites wear rate",
volume = "41",
number = "1",
pages = "19",
doi = "10.1007/s40430-018-1531-8"
}

Veličković, S., Stojanović, B., Babić, M., Vencl, A., Bobić, I., Vadaszne Bognar, G.,& Vučetić, F.. (2019). Parametric optimization of the aluminium nanocomposites wear rate. in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 41(1), 19.
https://doi.org/10.1007/s40430-018-1531-8

Veličković S, Stojanović B, Babić M, Vencl A, Bobić I, Vadaszne Bognar G, Vučetić F. Parametric optimization of the aluminium nanocomposites wear rate. in Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2019;41(1):19.
doi:10.1007/s40430-018-1531-8 .

Veličković, Sandra, Stojanović, Blaža, Babić, Miroslav, Vencl, Aleksandar, Bobić, Ilija, Vadaszne Bognar, Gabriella, Vučetić, Filip, "Parametric optimization of the aluminium nanocomposites wear rate" in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 41, no. 1 (2019):19,
https://doi.org/10.1007/s40430-018-1531-8 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Vučetić, Filip
AU  - Bobić, Biljana M.
AU  - Pitel, Ján
AU  - Bobić, Ilija
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8448
AB  - The influence of SiC microparticles reinforcement and graphite macroparticles addition on the friction and wear characteristics of A356 Al-Si alloys, produced by compocasting, has been assessed using a pin-on-disc tribometer. The incorporation of SiC reinforcement increased the coefficient of friction and reduced the wear. The addition of graphite did not reduce the coefficient of friction. In the case of hybrid composite with 1 wt% graphite, wear was more or less the same as with SiC reinforced composite, while in the case of hybrid composite with 3 wt% graphite, wear was further reduced. On the worn surfaces of hybrid composites, the presence of the discontinuous mixed surface layer, containing graphite and transferred counter-body material, was noticed. © 2018, Springer-Verlag London Ltd., part of Springer Nature.
T2  - The International Journal of Advanced Manufacturing Technology
T1  - Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles
VL  - 100
IS  - 9-12
SP  - 2135
EP  - 2146
DO  - 10.1007/s00170-018-2866-0
ER  - 

@article{
author = "Vencl, Aleksandar and Vučetić, Filip and Bobić, Biljana M. and Pitel, Ján and Bobić, Ilija",
year = "2019",
abstract = "The influence of SiC microparticles reinforcement and graphite macroparticles addition on the friction and wear characteristics of A356 Al-Si alloys, produced by compocasting, has been assessed using a pin-on-disc tribometer. The incorporation of SiC reinforcement increased the coefficient of friction and reduced the wear. The addition of graphite did not reduce the coefficient of friction. In the case of hybrid composite with 1 wt% graphite, wear was more or less the same as with SiC reinforced composite, while in the case of hybrid composite with 3 wt% graphite, wear was further reduced. On the worn surfaces of hybrid composites, the presence of the discontinuous mixed surface layer, containing graphite and transferred counter-body material, was noticed. © 2018, Springer-Verlag London Ltd., part of Springer Nature.",
journal = "The International Journal of Advanced Manufacturing Technology",
title = "Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles",
volume = "100",
number = "9-12",
pages = "2135-2146",
doi = "10.1007/s00170-018-2866-0"
}

Vencl, A., Vučetić, F., Bobić, B. M., Pitel, J.,& Bobić, I.. (2019). Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles. in The International Journal of Advanced Manufacturing Technology, 100(9-12), 2135-2146.
https://doi.org/10.1007/s00170-018-2866-0

Vencl A, Vučetić F, Bobić BM, Pitel J, Bobić I. Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles. in The International Journal of Advanced Manufacturing Technology. 2019;100(9-12):2135-2146.
doi:10.1007/s00170-018-2866-0 .

Vencl, Aleksandar, Vučetić, Filip, Bobić, Biljana M., Pitel, Ján, Bobić, Ilija, "Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles" in The International Journal of Advanced Manufacturing Technology, 100, no. 9-12 (2019):2135-2146,
https://doi.org/10.1007/s00170-018-2866-0 . .

TY  - JOUR
AU  - Stojanović, Blaža
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Miladinović, Slavica
AU  - Skerlić, Jasmina
PY  - 2018
UR  - http://link.springer.com/10.1007/s40430-018-1237-y
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7710
AB  - This paper presents the investigation of tribological behaviour of aluminium hybrid composites with Al–Si alloy A356 matrix, reinforced with 10 wt% silicon carbide and 0, 1 and 3 wt% graphite (Gr) with the application of Taguchi’s method. Tribological investigations were realized on block-on-disc tribometer under lubricated sliding conditions, at three sliding speeds (0.25, 0.5 and 1 m/s), three normal loads (40, 80 and 120 N) and at sliding distance of 2400 m. Wear rate and coefficient of friction were measured within the research. Analysis of the results was conducted using ANOVA technique, and it showed that the smallest values of wear and friction are observed for hybrid composite containing 3 wt% Gr. The prediction of wear rate and coefficient of friction was performed with the use of artificial neural network (ANN). After training of the ANN, the regression coefficient was obtained and it was equal to 0.98905 for the network with architecture 3-20-30-2.
T2  - Journal of the Brazilian Society of Mechanical Sciences and Engineering
T1  - Experimental optimisation of the tribological behaviour of Al/SiC/Gr hybrid composites based on Taguchi’s method and artificial neural network
VL  - 40
IS  - 6
SP  - 311
DO  - 10.1007/s40430-018-1237-y
ER  - 

@article{
author = "Stojanović, Blaža and Vencl, Aleksandar and Bobić, Ilija and Miladinović, Slavica and Skerlić, Jasmina",
year = "2018",
abstract = "This paper presents the investigation of tribological behaviour of aluminium hybrid composites with Al–Si alloy A356 matrix, reinforced with 10 wt% silicon carbide and 0, 1 and 3 wt% graphite (Gr) with the application of Taguchi’s method. Tribological investigations were realized on block-on-disc tribometer under lubricated sliding conditions, at three sliding speeds (0.25, 0.5 and 1 m/s), three normal loads (40, 80 and 120 N) and at sliding distance of 2400 m. Wear rate and coefficient of friction were measured within the research. Analysis of the results was conducted using ANOVA technique, and it showed that the smallest values of wear and friction are observed for hybrid composite containing 3 wt% Gr. The prediction of wear rate and coefficient of friction was performed with the use of artificial neural network (ANN). After training of the ANN, the regression coefficient was obtained and it was equal to 0.98905 for the network with architecture 3-20-30-2.",
journal = "Journal of the Brazilian Society of Mechanical Sciences and Engineering",
title = "Experimental optimisation of the tribological behaviour of Al/SiC/Gr hybrid composites based on Taguchi’s method and artificial neural network",
volume = "40",
number = "6",
pages = "311",
doi = "10.1007/s40430-018-1237-y"
}

Stojanović, B., Vencl, A., Bobić, I., Miladinović, S.,& Skerlić, J.. (2018). Experimental optimisation of the tribological behaviour of Al/SiC/Gr hybrid composites based on Taguchi’s method and artificial neural network. in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40(6), 311.
https://doi.org/10.1007/s40430-018-1237-y

Stojanović B, Vencl A, Bobić I, Miladinović S, Skerlić J. Experimental optimisation of the tribological behaviour of Al/SiC/Gr hybrid composites based on Taguchi’s method and artificial neural network. in Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2018;40(6):311.
doi:10.1007/s40430-018-1237-y .

Stojanović, Blaža, Vencl, Aleksandar, Bobić, Ilija, Miladinović, Slavica, Skerlić, Jasmina, "Experimental optimisation of the tribological behaviour of Al/SiC/Gr hybrid composites based on Taguchi’s method and artificial neural network" in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40, no. 6 (2018):311,
https://doi.org/10.1007/s40430-018-1237-y . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Biljana M.
AU  - Vučetić, Filip
AU  - Svoboda, Petr
AU  - Popović, Vladimir M.
AU  - Bobić, Ilija
PY  - 2018
UR  - http://link.springer.com/10.1007/s40430-018-1441-9
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7911
AB  - Nanocomposites were synthesized via compocasting using Zn25Al3Si and Zn25Al3Si0.03Sr alloys as the matrices and nanoparticles of Al2O3 (1 wt%) as the reinforcement. Structure of the nanocomposites was examined, and their basic mechanical and tribological properties were tested. Distribution of primary silicon particles in the structure of nanocomposites has been improved compared to their distribution in the Zn25Al3Si matrix alloy due to the presence of Al2O3 nanoparticles and strontium. The primary silicon particles in the structure of the nanocomposites were found to be more fine-grained compared to the same particles in the structure of the as-cast Zn25Al3Si alloy. Tested mechanical properties of the nanocomposite with Zn25Al3Si alloy matrix are improved, compared to the matrix alloy. The nanocomposite with Zn25Al3Si0.03Sr alloy matrix is characterized with slightly higher value of compressive yield strength and a slightly lower hardness value compared to the as-cast Zn25Al3Si alloy. Both nanocomposites showed lower wear rate and higher coefficient of friction, compared to the matrix alloy, in sliding under the boundary lubricating regime. However, the nanocomposite with Zn25Al3Si alloy matrix showed better tribological properties than the nanocomposite with Zn25Al3Si0.03Sr alloy matrix. © 2018, The Brazilian Society of Mechanical Sciences and Engineering.
T2  - Journal of the Brazilian Society of Mechanical Sciences and Engineering
T1  - Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy
VL  - 40
IS  - 11
SP  - 513
DO  - 10.1007/s40430-018-1441-9
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Biljana M. and Vučetić, Filip and Svoboda, Petr and Popović, Vladimir M. and Bobić, Ilija",
year = "2018",
abstract = "Nanocomposites were synthesized via compocasting using Zn25Al3Si and Zn25Al3Si0.03Sr alloys as the matrices and nanoparticles of Al2O3 (1 wt%) as the reinforcement. Structure of the nanocomposites was examined, and their basic mechanical and tribological properties were tested. Distribution of primary silicon particles in the structure of nanocomposites has been improved compared to their distribution in the Zn25Al3Si matrix alloy due to the presence of Al2O3 nanoparticles and strontium. The primary silicon particles in the structure of the nanocomposites were found to be more fine-grained compared to the same particles in the structure of the as-cast Zn25Al3Si alloy. Tested mechanical properties of the nanocomposite with Zn25Al3Si alloy matrix are improved, compared to the matrix alloy. The nanocomposite with Zn25Al3Si0.03Sr alloy matrix is characterized with slightly higher value of compressive yield strength and a slightly lower hardness value compared to the as-cast Zn25Al3Si alloy. Both nanocomposites showed lower wear rate and higher coefficient of friction, compared to the matrix alloy, in sliding under the boundary lubricating regime. However, the nanocomposite with Zn25Al3Si alloy matrix showed better tribological properties than the nanocomposite with Zn25Al3Si0.03Sr alloy matrix. © 2018, The Brazilian Society of Mechanical Sciences and Engineering.",
journal = "Journal of the Brazilian Society of Mechanical Sciences and Engineering",
title = "Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy",
volume = "40",
number = "11",
pages = "513",
doi = "10.1007/s40430-018-1441-9"
}

Vencl, A., Bobić, B. M., Vučetić, F., Svoboda, P., Popović, V. M.,& Bobić, I.. (2018). Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy. in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40(11), 513.
https://doi.org/10.1007/s40430-018-1441-9

Vencl A, Bobić BM, Vučetić F, Svoboda P, Popović VM, Bobić I. Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy. in Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2018;40(11):513.
doi:10.1007/s40430-018-1441-9 .

Vencl, Aleksandar, Bobić, Biljana M., Vučetić, Filip, Svoboda, Petr, Popović, Vladimir M., Bobić, Ilija, "Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy" in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40, no. 11 (2018):513,
https://doi.org/10.1007/s40430-018-1441-9 . .

TY  - JOUR
AU  - Maksimović, Vesna
AU  - Devečerski, Aleksandar
AU  - Došen, Anja M.
AU  - Bobić, Ilija
AU  - Erić, Milić D.
AU  - Volkov-Husović, Tatjana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1391
AB  - In the present study, an aluminum alloy A356 composite with addition of 5 wt% fly ash was synthesized and subjected to the cavitation erosion resistance test in order to find out if this material can be used in conditions where the cavitation erosion resistance is expected. Obtained results were compared with that of as-cast aluminum A356 alloy, confirming that composite possessed better cavitation erosion resistance than original alloy and that fly ash can be used as an effective reinforcement in metal matrix composites production. Scanning electron microscopy and optical microscopy was used for microstructural analysis. Phase identification of fly ash was carried out using X-ray diffraction analysis. Several methods for monitoring the cavitation erosion resistance of A356 alloy and corresponding composite were applied, such as: mass loss (Delta m), volume loss (Delta V), level of surface degradatiom (P/Po) and pit depth.
T2  - Transactions of the Indian Institute of Metals
T1  - Comparative Study on Cavitation Erosion Resistance of A356 Alloy and A356FA5 Composite
VL  - 70
IS  - 1
SP  - 97
EP  - 105
DO  - 10.1007/s12666-016-0864-1
ER  - 

@article{
author = "Maksimović, Vesna and Devečerski, Aleksandar and Došen, Anja M. and Bobić, Ilija and Erić, Milić D. and Volkov-Husović, Tatjana",
year = "2017",
abstract = "In the present study, an aluminum alloy A356 composite with addition of 5 wt% fly ash was synthesized and subjected to the cavitation erosion resistance test in order to find out if this material can be used in conditions where the cavitation erosion resistance is expected. Obtained results were compared with that of as-cast aluminum A356 alloy, confirming that composite possessed better cavitation erosion resistance than original alloy and that fly ash can be used as an effective reinforcement in metal matrix composites production. Scanning electron microscopy and optical microscopy was used for microstructural analysis. Phase identification of fly ash was carried out using X-ray diffraction analysis. Several methods for monitoring the cavitation erosion resistance of A356 alloy and corresponding composite were applied, such as: mass loss (Delta m), volume loss (Delta V), level of surface degradatiom (P/Po) and pit depth.",
journal = "Transactions of the Indian Institute of Metals",
title = "Comparative Study on Cavitation Erosion Resistance of A356 Alloy and A356FA5 Composite",
volume = "70",
number = "1",
pages = "97-105",
doi = "10.1007/s12666-016-0864-1"
}

Maksimović, V., Devečerski, A., Došen, A. M., Bobić, I., Erić, M. D.,& Volkov-Husović, T.. (2017). Comparative Study on Cavitation Erosion Resistance of A356 Alloy and A356FA5 Composite. in Transactions of the Indian Institute of Metals, 70(1), 97-105.
https://doi.org/10.1007/s12666-016-0864-1

Maksimović V, Devečerski A, Došen AM, Bobić I, Erić MD, Volkov-Husović T. Comparative Study on Cavitation Erosion Resistance of A356 Alloy and A356FA5 Composite. in Transactions of the Indian Institute of Metals. 2017;70(1):97-105.
doi:10.1007/s12666-016-0864-1 .

Maksimović, Vesna, Devečerski, Aleksandar, Došen, Anja M., Bobić, Ilija, Erić, Milić D., Volkov-Husović, Tatjana, "Comparative Study on Cavitation Erosion Resistance of A356 Alloy and A356FA5 Composite" in Transactions of the Indian Institute of Metals, 70, no. 1 (2017):97-105,
https://doi.org/10.1007/s12666-016-0864-1 . .

TY  - JOUR
AU  - Veličković, Sandra
AU  - Stojanović, Blaža
AU  - Babić, Miroslav
AU  - Bobić, Ilija
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1631
AB  - This paper analyses the influence of graphite reinforcement, load and sliding speed with constant sliding distance on tribological behavior of A356 aluminum matrix composites reinforced with 10wt.% silicon carbide and graphite using the Taguchi design. Hybrid composites were produced in the compo-casting process. Tribological tests were performed on a block-on-disc tribometer where the weight percentage of graphite has three variations (0, 3, and 5), as well as load (10 N, 20 N, and 30 N) and sliding speed (0.25m/s, 0.5m/s, and 1m/s), with sliding distance of 300m. The wear of the composite is investigated under dry sliding condition. The specific wear rate was analyzed using Taguchi method with the aim of finding the optimal parameters. By applying analysis of variance, it was determined that the best tribological properties has A356/10SiC/3Gr hybrid composite. It was also found that the greatest impact on specific wear rate has load with the percentage effect of 69.163%, then sliding speed with 14.426% and the interaction between wt.% graphite and load. The dominant wear mechanism is adhesive wear as confirmed by scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS).
T2  - Journal of Composite Materials
T1  - Optimization of tribological properties of aluminum hybrid composites using Taguchi design
VL  - 51
IS  - 17
SP  - 2505
EP  - 2515
DO  - 10.1177/0021998316672294
ER  - 

@article{
author = "Veličković, Sandra and Stojanović, Blaža and Babić, Miroslav and Bobić, Ilija",
year = "2017",
abstract = "This paper analyses the influence of graphite reinforcement, load and sliding speed with constant sliding distance on tribological behavior of A356 aluminum matrix composites reinforced with 10wt.% silicon carbide and graphite using the Taguchi design. Hybrid composites were produced in the compo-casting process. Tribological tests were performed on a block-on-disc tribometer where the weight percentage of graphite has three variations (0, 3, and 5), as well as load (10 N, 20 N, and 30 N) and sliding speed (0.25m/s, 0.5m/s, and 1m/s), with sliding distance of 300m. The wear of the composite is investigated under dry sliding condition. The specific wear rate was analyzed using Taguchi method with the aim of finding the optimal parameters. By applying analysis of variance, it was determined that the best tribological properties has A356/10SiC/3Gr hybrid composite. It was also found that the greatest impact on specific wear rate has load with the percentage effect of 69.163%, then sliding speed with 14.426% and the interaction between wt.% graphite and load. The dominant wear mechanism is adhesive wear as confirmed by scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS).",
journal = "Journal of Composite Materials",
title = "Optimization of tribological properties of aluminum hybrid composites using Taguchi design",
volume = "51",
number = "17",
pages = "2505-2515",
doi = "10.1177/0021998316672294"
}

Veličković, S., Stojanović, B., Babić, M.,& Bobić, I.. (2017). Optimization of tribological properties of aluminum hybrid composites using Taguchi design. in Journal of Composite Materials, 51(17), 2505-2515.
https://doi.org/10.1177/0021998316672294

Veličković S, Stojanović B, Babić M, Bobić I. Optimization of tribological properties of aluminum hybrid composites using Taguchi design. in Journal of Composite Materials. 2017;51(17):2505-2515.
doi:10.1177/0021998316672294 .

Veličković, Sandra, Stojanović, Blaža, Babić, Miroslav, Bobić, Ilija, "Optimization of tribological properties of aluminum hybrid composites using Taguchi design" in Journal of Composite Materials, 51, no. 17 (2017):2505-2515,
https://doi.org/10.1177/0021998316672294 . .

TY  - JOUR
AU  - Bobić, Biljana M.
AU  - Bajat, Jelena B.
AU  - Bobić, Ilija
AU  - Jegdić, Bore V.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1174
AB  - The influence of corrosion on the surface appearance and microstructure of particulate ZA27/SiCp composites was examined after 30 d immersion in a sodium chloride solution with the access of atmospheric oxygen. The composites with different contents of SiC micro-particles were synthesized via compo casting. Microstructural studies by means of optical microscopy (OM) and scanning electron microscopy (SEM) showed that corrosion occurred in the composite matrices, preferentially in regions of the. phase, rich in zinc. The corrosion processes did not affect the silicon carbide particles incorporated in the matrix alloy. According to the results of electrochemical polarization measurements, an increase in the content of SiC particles in the composite matrice has led to the lower corrosion resistance in the composites.
T2  - Transactions of Nonferrous Metals Society of China
T1  - Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution
VL  - 26
IS  - 6
SP  - 1512
EP  - 1521
DO  - 10.1016/S1003-6326(16)64257-7
ER  - 

@article{
author = "Bobić, Biljana M. and Bajat, Jelena B. and Bobić, Ilija and Jegdić, Bore V.",
year = "2016",
abstract = "The influence of corrosion on the surface appearance and microstructure of particulate ZA27/SiCp composites was examined after 30 d immersion in a sodium chloride solution with the access of atmospheric oxygen. The composites with different contents of SiC micro-particles were synthesized via compo casting. Microstructural studies by means of optical microscopy (OM) and scanning electron microscopy (SEM) showed that corrosion occurred in the composite matrices, preferentially in regions of the. phase, rich in zinc. The corrosion processes did not affect the silicon carbide particles incorporated in the matrix alloy. According to the results of electrochemical polarization measurements, an increase in the content of SiC particles in the composite matrice has led to the lower corrosion resistance in the composites.",
journal = "Transactions of Nonferrous Metals Society of China",
title = "Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution",
volume = "26",
number = "6",
pages = "1512-1521",
doi = "10.1016/S1003-6326(16)64257-7"
}

Bobić, B. M., Bajat, J. B., Bobić, I.,& Jegdić, B. V.. (2016). Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution. in Transactions of Nonferrous Metals Society of China, 26(6), 1512-1521.
https://doi.org/10.1016/S1003-6326(16)64257-7

Bobić BM, Bajat JB, Bobić I, Jegdić BV. Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution. in Transactions of Nonferrous Metals Society of China. 2016;26(6):1512-1521.
doi:10.1016/S1003-6326(16)64257-7 .

Bobić, Biljana M., Bajat, Jelena B., Bobić, Ilija, Jegdić, Bore V., "Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution" in Transactions of Nonferrous Metals Society of China, 26, no. 6 (2016):1512-1521,
https://doi.org/10.1016/S1003-6326(16)64257-7 . .

TY  - JOUR
AU  - Bobić, Ilija
AU  - Ružić, Jovana
AU  - Bobić, Biljana M.
AU  - Babić, Miroslav
AU  - Vencl, Aleksandar
AU  - Mitrovic, Slobodan
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/128
AB  - Hybrid A356/SiCp/Gr(p) composites were produced via compo-casting using the A356 aluminum alloy as the composite matrix, with silicon carbide microparticles (SiCp) and graphite macroparticles (Gr(p)) as reinforcements. The effect of the thixocasting process on the microstructure of a modified A356 alloy (with 0.03 mass% of strontium) was considered. The microstructures of the thixocast A356 alloy and the synthesized composite materials were examined by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS) and X-ray diffraction (XRD). The fracture surfaces of the composite matrix and the composites were also analyzed. The thixocast A356 alloy and the composites were subjected to artificial aging after a solution heat treatment. Aging kinetics was followed by hardness measurements. Differential scanning calorimetry (DSC) was applied to reveal the presence of phases formed during artificial aging. The composites reached maximum hardness faster than the thixocast A356 alloy. The time required to attain peak hardness decreases with the increase in the content of particulate reinforcements. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing
T1  - Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles
VL  - 612
SP  - 7
EP  - 15
DO  - 10.1016/j.msea.2014.06.028
ER  - 

@article{
author = "Bobić, Ilija and Ružić, Jovana and Bobić, Biljana M. and Babić, Miroslav and Vencl, Aleksandar and Mitrovic, Slobodan",
year = "2014",
abstract = "Hybrid A356/SiCp/Gr(p) composites were produced via compo-casting using the A356 aluminum alloy as the composite matrix, with silicon carbide microparticles (SiCp) and graphite macroparticles (Gr(p)) as reinforcements. The effect of the thixocasting process on the microstructure of a modified A356 alloy (with 0.03 mass% of strontium) was considered. The microstructures of the thixocast A356 alloy and the synthesized composite materials were examined by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS) and X-ray diffraction (XRD). The fracture surfaces of the composite matrix and the composites were also analyzed. The thixocast A356 alloy and the composites were subjected to artificial aging after a solution heat treatment. Aging kinetics was followed by hardness measurements. Differential scanning calorimetry (DSC) was applied to reveal the presence of phases formed during artificial aging. The composites reached maximum hardness faster than the thixocast A356 alloy. The time required to attain peak hardness decreases with the increase in the content of particulate reinforcements. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing",
title = "Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles",
volume = "612",
pages = "7-15",
doi = "10.1016/j.msea.2014.06.028"
}

Bobić, I., Ružić, J., Bobić, B. M., Babić, M., Vencl, A.,& Mitrovic, S.. (2014). Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles. in Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 612, 7-15.
https://doi.org/10.1016/j.msea.2014.06.028

Bobić I, Ružić J, Bobić BM, Babić M, Vencl A, Mitrovic S. Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles. in Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing. 2014;612:7-15.
doi:10.1016/j.msea.2014.06.028 .

Bobić, Ilija, Ružić, Jovana, Bobić, Biljana M., Babić, Miroslav, Vencl, Aleksandar, Mitrovic, Slobodan, "Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles" in Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 612 (2014):7-15,
https://doi.org/10.1016/j.msea.2014.06.028 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Vučetić, Filip
AU  - Bobić, Biljana M.
AU  - Ružić, Jovana
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/144
AB  - The ZA-27 alloy is a zinc-aluminium casting alloy that has been frequently used as the material for sleeves of plain bearings. It has good physical, mechanical and tribological properties. However, one of the major disadvantages is its dimensional instability over a period of time (ageing). To overcome this, copper in the alloy may be replaced with silicon. Coarsening of silicon particles can be controlled by a suitable addition of strontium. In this paper, the commercial ZA-27 alloy and six different Zn25Al alloys (with 1 and 3 wt.% silicon; and with 0, 0.03 and 0.05 wt.% strontium) were obtained by casting in the pre-heated steel mould. Casting of the alloys was carried out at a laboratory level. In the alloys containing silicon, a finer dendritic structure was noticed compared to the structure of the commercial ZA-27 alloy. The addition of strontium influenced the size and distribution of primary silicon particles. Needle-like particles of eutectic silicon were changed into the fibrous ones. The presence of silicon and strontium did not significantly affect mechanical properties of the obtained Zn25Al alloys compared to mechanical properties of the commercial ZA-27 alloy. Wear rate of the alloys containing silicon was lower than that of the ZA-27 alloy. The addition of strontium further lowers the wear rate and slightly increases the coefficient of friction. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Materials and Design
T1  - Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition
VL  - 64
SP  - 381
EP  - 392
DO  - 10.1016/j.matdes.2014.07.056
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Ilija and Vučetić, Filip and Bobić, Biljana M. and Ružić, Jovana",
year = "2014",
abstract = "The ZA-27 alloy is a zinc-aluminium casting alloy that has been frequently used as the material for sleeves of plain bearings. It has good physical, mechanical and tribological properties. However, one of the major disadvantages is its dimensional instability over a period of time (ageing). To overcome this, copper in the alloy may be replaced with silicon. Coarsening of silicon particles can be controlled by a suitable addition of strontium. In this paper, the commercial ZA-27 alloy and six different Zn25Al alloys (with 1 and 3 wt.% silicon; and with 0, 0.03 and 0.05 wt.% strontium) were obtained by casting in the pre-heated steel mould. Casting of the alloys was carried out at a laboratory level. In the alloys containing silicon, a finer dendritic structure was noticed compared to the structure of the commercial ZA-27 alloy. The addition of strontium influenced the size and distribution of primary silicon particles. Needle-like particles of eutectic silicon were changed into the fibrous ones. The presence of silicon and strontium did not significantly affect mechanical properties of the obtained Zn25Al alloys compared to mechanical properties of the commercial ZA-27 alloy. Wear rate of the alloys containing silicon was lower than that of the ZA-27 alloy. The addition of strontium further lowers the wear rate and slightly increases the coefficient of friction. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Materials and Design",
title = "Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition",
volume = "64",
pages = "381-392",
doi = "10.1016/j.matdes.2014.07.056"
}

Vencl, A., Bobić, I., Vučetić, F., Bobić, B. M.,& Ružić, J.. (2014). Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition. in Materials and Design, 64, 381-392.
https://doi.org/10.1016/j.matdes.2014.07.056

Vencl A, Bobić I, Vučetić F, Bobić BM, Ružić J. Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition. in Materials and Design. 2014;64:381-392.
doi:10.1016/j.matdes.2014.07.056 .

Vencl, Aleksandar, Bobić, Ilija, Vučetić, Filip, Bobić, Biljana M., Ružić, Jovana, "Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition" in Materials and Design, 64 (2014):381-392,
https://doi.org/10.1016/j.matdes.2014.07.056 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Stojanović, Blaža
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5894
AB  - Purpose - Aluminium alloys are frequently applied in automotive and other industries, since they provide mass reduction. Besides positive effects, aluminium alloys have their shortcomings reflected, first of all, in inappropriate tribological properties of these materials. The aim of this research was to enable the production of cheap aluminium alloy matrix composite with favourable combination of structural, mechanical and tribological properties, focusing on the tribological behaviour. Design/methodology/approach - The A356 Al-Si alloy was used as a matrix for producing metal matrix composites in compocasting process. Three different materials, in form of particles, were added to the matrix (Al2O3, SiC and graphite). Hardness and tribological properties (wear, friction and wear mechanism) of heat-treated (T6) samples were examined and compared. Tribological tests were carried out on ball-on-block tribometer under dry sliding conditions. Sliding was linear (reciprocating). Counter body was alumina ball. Average velocity was 0.038 m/s (max. 0.06 m/s), sliding distance was 500 m and normal load was 1 N. Findings - The effect of two different ceramic particles and graphite particles on tribological properties of obtained composites was evaluated. Wear resistance of composites reinforced with SiC particles was higher and coefficient of friction was lower compared to the composite reinforced with Al2O3 particles. A dual hybrid composite (with SiC and graphite particles) showed the lowest value of wear rate and friction coefficient. Dominant wear mechanism for all tested material was adhesion. Research limitations/implications - It seems useful to continue the work on developing hybrid composites containing soft graphite particles with A356 Al-Si alloy as matrix. The major task should be to improve particles distribution (especially with higher graphite content) and to explore tribological behaviour in diverse working conditions. Originality/value - Particulate composites with A356 aluminium alloy as a matrix produced in compocasting process using ceramic particles (Al2O3, SiC) were investigated in many researches, but there are only few detailed analyses of dual composites (with the addition of ceramic and graphite particles). In some previous studies, it was shown that compocasting process, as relatively cheap technology, can obtain good structural and mechanical characteristics of composites. In this study, it was shown that even a low graphite content, under specified conditions, can improve tribological properties.
T2  - Industrial Lubrication and Tribology
T1  - Tribological properties of A356 Al-Si alloy composites under dry sliding conditions
VL  - 66
IS  - 1
SP  - 66
EP  - 74
DO  - 10.1108/ILT-06-2011-0047
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Ilija and Stojanović, Blaža",
year = "2014",
abstract = "Purpose - Aluminium alloys are frequently applied in automotive and other industries, since they provide mass reduction. Besides positive effects, aluminium alloys have their shortcomings reflected, first of all, in inappropriate tribological properties of these materials. The aim of this research was to enable the production of cheap aluminium alloy matrix composite with favourable combination of structural, mechanical and tribological properties, focusing on the tribological behaviour. Design/methodology/approach - The A356 Al-Si alloy was used as a matrix for producing metal matrix composites in compocasting process. Three different materials, in form of particles, were added to the matrix (Al2O3, SiC and graphite). Hardness and tribological properties (wear, friction and wear mechanism) of heat-treated (T6) samples were examined and compared. Tribological tests were carried out on ball-on-block tribometer under dry sliding conditions. Sliding was linear (reciprocating). Counter body was alumina ball. Average velocity was 0.038 m/s (max. 0.06 m/s), sliding distance was 500 m and normal load was 1 N. Findings - The effect of two different ceramic particles and graphite particles on tribological properties of obtained composites was evaluated. Wear resistance of composites reinforced with SiC particles was higher and coefficient of friction was lower compared to the composite reinforced with Al2O3 particles. A dual hybrid composite (with SiC and graphite particles) showed the lowest value of wear rate and friction coefficient. Dominant wear mechanism for all tested material was adhesion. Research limitations/implications - It seems useful to continue the work on developing hybrid composites containing soft graphite particles with A356 Al-Si alloy as matrix. The major task should be to improve particles distribution (especially with higher graphite content) and to explore tribological behaviour in diverse working conditions. Originality/value - Particulate composites with A356 aluminium alloy as a matrix produced in compocasting process using ceramic particles (Al2O3, SiC) were investigated in many researches, but there are only few detailed analyses of dual composites (with the addition of ceramic and graphite particles). In some previous studies, it was shown that compocasting process, as relatively cheap technology, can obtain good structural and mechanical characteristics of composites. In this study, it was shown that even a low graphite content, under specified conditions, can improve tribological properties.",
journal = "Industrial Lubrication and Tribology",
title = "Tribological properties of A356 Al-Si alloy composites under dry sliding conditions",
volume = "66",
number = "1",
pages = "66-74",
doi = "10.1108/ILT-06-2011-0047"
}

Vencl, A., Bobić, I.,& Stojanović, B.. (2014). Tribological properties of A356 Al-Si alloy composites under dry sliding conditions. in Industrial Lubrication and Tribology, 66(1), 66-74.
https://doi.org/10.1108/ILT-06-2011-0047

Vencl A, Bobić I, Stojanović B. Tribological properties of A356 Al-Si alloy composites under dry sliding conditions. in Industrial Lubrication and Tribology. 2014;66(1):66-74.
doi:10.1108/ILT-06-2011-0047 .

Vencl, Aleksandar, Bobić, Ilija, Stojanović, Blaža, "Tribological properties of A356 Al-Si alloy composites under dry sliding conditions" in Industrial Lubrication and Tribology, 66, no. 1 (2014):66-74,
https://doi.org/10.1108/ILT-06-2011-0047 . .

TY  - JOUR
AU  - Bobić, Ilija
AU  - Babić, Miroslav
AU  - Vencl, Aleksandar
AU  - Bobić, Biljana M.
AU  - Mitrovic, Slobodan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5727
AB  - Thixocast ZA27 alloy and particulate ZA27/SiCp composites were subjected to artificial aging at 80, 120 and 160 degrees C (T5 regime). Composites with 5 and 10 vol.% SiC particles were produced via the compocasting method. The influence of the aging was investigated using different techniques. Differential scanning calorimetry was performed to reveal the presence of phases created in the thixocast ZA27 alloy and the composites. Microstructures and fracture behavior were examined by means of optical microscopy, scanning electron microscopy and X-ray diffraction. Aging processes in the matrix alloy and composites were followed using hardness measurements. A decrease in the hardness values was noticed with the increase in the aging temperature. At higher temperatures diffusion of zinc atoms from supersaturated phases in the matrix alloy was enhanced, which resulted in faster changes in the hardness. Aging processes in the composites were significantly accelerated compared to the matrix alloy, due to the presence of particulate reinforcements. The maximum in hardness was achieved for shorter time in the ZA27/SiCp composite with higher volume fraction of SiC particles.
T2  - International Journal of Materials Research
T1  - Artificial aging of thixocast ZA27 alloy and particulate ZA27/SiCp composites
VL  - 104
IS  - 10
SP  - 954
EP  - 965
DO  - 10.3139/146.110958
ER  - 

@article{
author = "Bobić, Ilija and Babić, Miroslav and Vencl, Aleksandar and Bobić, Biljana M. and Mitrovic, Slobodan",
year = "2013",
abstract = "Thixocast ZA27 alloy and particulate ZA27/SiCp composites were subjected to artificial aging at 80, 120 and 160 degrees C (T5 regime). Composites with 5 and 10 vol.% SiC particles were produced via the compocasting method. The influence of the aging was investigated using different techniques. Differential scanning calorimetry was performed to reveal the presence of phases created in the thixocast ZA27 alloy and the composites. Microstructures and fracture behavior were examined by means of optical microscopy, scanning electron microscopy and X-ray diffraction. Aging processes in the matrix alloy and composites were followed using hardness measurements. A decrease in the hardness values was noticed with the increase in the aging temperature. At higher temperatures diffusion of zinc atoms from supersaturated phases in the matrix alloy was enhanced, which resulted in faster changes in the hardness. Aging processes in the composites were significantly accelerated compared to the matrix alloy, due to the presence of particulate reinforcements. The maximum in hardness was achieved for shorter time in the ZA27/SiCp composite with higher volume fraction of SiC particles.",
journal = "International Journal of Materials Research",
title = "Artificial aging of thixocast ZA27 alloy and particulate ZA27/SiCp composites",
volume = "104",
number = "10",
pages = "954-965",
doi = "10.3139/146.110958"
}

Bobić, I., Babić, M., Vencl, A., Bobić, B. M.,& Mitrovic, S.. (2013). Artificial aging of thixocast ZA27 alloy and particulate ZA27/SiCp composites. in International Journal of Materials Research, 104(10), 954-965.
https://doi.org/10.3139/146.110958

Bobić I, Babić M, Vencl A, Bobić BM, Mitrovic S. Artificial aging of thixocast ZA27 alloy and particulate ZA27/SiCp composites. in International Journal of Materials Research. 2013;104(10):954-965.
doi:10.3139/146.110958 .

Bobić, Ilija, Babić, Miroslav, Vencl, Aleksandar, Bobić, Biljana M., Mitrovic, Slobodan, "Artificial aging of thixocast ZA27 alloy and particulate ZA27/SiCp composites" in International Journal of Materials Research, 104, no. 10 (2013):954-965,
https://doi.org/10.3139/146.110958 . .

TY  - JOUR
AU  - Bobić, Biljana M.
AU  - Bajat, Jelena B.
AU  - Aćimović-Pavlović, Zagorka
AU  - Bobić, Ilija
AU  - Jegdić, Bore V.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5663
AB  - The influence of corrosion on the microstructure of thixoformed and heat-treated ZA27 alloys was investigated. The microstructure of ZA27 alloy was affected by heat treatment. The process of electrochemical corrosion occurs in both ZA27 alloys through the area of eta phase. According to the results of immersion test and electrochemical measurements, the corrosion rate of the thixoformed ZA27 alloy is at least 50% lower than that of the thixoformed and thermally processed alloy. This indicates the unfavourable influence of applied heat treatment (T4 regime) on the corrosion resistance of the thixoformed ZA27 alloy.
T2  - Transactions of Nonferrous Metals Society of China
T1  - Corrosion behaviour of thixoformed and heat-treated ZA27 alloys in NaCl solution
VL  - 23
IS  - 4
SP  - 931
EP  - 941
DO  - 10.1016/S1003-6326(13)62550-9
ER  - 

@article{
author = "Bobić, Biljana M. and Bajat, Jelena B. and Aćimović-Pavlović, Zagorka and Bobić, Ilija and Jegdić, Bore V.",
year = "2013",
abstract = "The influence of corrosion on the microstructure of thixoformed and heat-treated ZA27 alloys was investigated. The microstructure of ZA27 alloy was affected by heat treatment. The process of electrochemical corrosion occurs in both ZA27 alloys through the area of eta phase. According to the results of immersion test and electrochemical measurements, the corrosion rate of the thixoformed ZA27 alloy is at least 50% lower than that of the thixoformed and thermally processed alloy. This indicates the unfavourable influence of applied heat treatment (T4 regime) on the corrosion resistance of the thixoformed ZA27 alloy.",
journal = "Transactions of Nonferrous Metals Society of China",
title = "Corrosion behaviour of thixoformed and heat-treated ZA27 alloys in NaCl solution",
volume = "23",
number = "4",
pages = "931-941",
doi = "10.1016/S1003-6326(13)62550-9"
}

Bobić, B. M., Bajat, J. B., Aćimović-Pavlović, Z., Bobić, I.,& Jegdić, B. V.. (2013). Corrosion behaviour of thixoformed and heat-treated ZA27 alloys in NaCl solution. in Transactions of Nonferrous Metals Society of China, 23(4), 931-941.
https://doi.org/10.1016/S1003-6326(13)62550-9

Bobić BM, Bajat JB, Aćimović-Pavlović Z, Bobić I, Jegdić BV. Corrosion behaviour of thixoformed and heat-treated ZA27 alloys in NaCl solution. in Transactions of Nonferrous Metals Society of China. 2013;23(4):931-941.
doi:10.1016/S1003-6326(13)62550-9 .

Bobić, Biljana M., Bajat, Jelena B., Aćimović-Pavlović, Zagorka, Bobić, Ilija, Jegdić, Bore V., "Corrosion behaviour of thixoformed and heat-treated ZA27 alloys in NaCl solution" in Transactions of Nonferrous Metals Society of China, 23, no. 4 (2013):931-941,
https://doi.org/10.1016/S1003-6326(13)62550-9 . .

TY  - JOUR
AU  - Mitrovic, S.
AU  - Babic, M.
AU  - Zivic, F.
AU  - Bobić, Ilija
AU  - Erić, Milić D.
AU  - Dzunic, D.
AU  - Pantic, M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5274
AB  - The lubricated and dry sliding wear behaviour of ZA-27 alloy composites reinforced with Al2O3 particles of size 250 mu m was evaluated. The content of Al2O3 particles in the alloy was 3, 5 and 10 wt.%. Composites were produced by the compocasting process using mechanical mixing of the matrix, i.e. Al2O3 particles as reinforcement were added into the semi-solid ZA-27 alloy by infiltration and admixing. A block-on-disc wear test device was used to evaluate the wear rate, whereat 30CrNiMo8 steel disc was used as the counterface, under dry and lubricated sliding conditions at different specific loads and sliding speeds. Results indicated that the wear rates of the composites were lower than those of the matrix alloy and further decreased with the increase in Al2O3 particles content in all combinations of applied loads and sliding speeds both in dry and lubricated tests.
T2  - Journal of the Balkan Tribological Association
T1  - Influence of Al2o3 Particle Content on the Sliding Wear Behaviour of Za-27 Alloy Composites
VL  - 18
IS  - 4
SP  - 548
EP  - 558
UR  - https://hdl.handle.net/21.15107/rcub_vinar_5274
ER  - 

@article{
author = "Mitrovic, S. and Babic, M. and Zivic, F. and Bobić, Ilija and Erić, Milić D. and Dzunic, D. and Pantic, M.",
year = "2012",
abstract = "The lubricated and dry sliding wear behaviour of ZA-27 alloy composites reinforced with Al2O3 particles of size 250 mu m was evaluated. The content of Al2O3 particles in the alloy was 3, 5 and 10 wt.%. Composites were produced by the compocasting process using mechanical mixing of the matrix, i.e. Al2O3 particles as reinforcement were added into the semi-solid ZA-27 alloy by infiltration and admixing. A block-on-disc wear test device was used to evaluate the wear rate, whereat 30CrNiMo8 steel disc was used as the counterface, under dry and lubricated sliding conditions at different specific loads and sliding speeds. Results indicated that the wear rates of the composites were lower than those of the matrix alloy and further decreased with the increase in Al2O3 particles content in all combinations of applied loads and sliding speeds both in dry and lubricated tests.",
journal = "Journal of the Balkan Tribological Association",
title = "Influence of Al2o3 Particle Content on the Sliding Wear Behaviour of Za-27 Alloy Composites",
volume = "18",
number = "4",
pages = "548-558",
url = "https://hdl.handle.net/21.15107/rcub_vinar_5274"
}

Mitrovic, S., Babic, M., Zivic, F., Bobić, I., Erić, M. D., Dzunic, D.,& Pantic, M.. (2012). Influence of Al2o3 Particle Content on the Sliding Wear Behaviour of Za-27 Alloy Composites. in Journal of the Balkan Tribological Association, 18(4), 548-558.
https://hdl.handle.net/21.15107/rcub_vinar_5274

Mitrovic S, Babic M, Zivic F, Bobić I, Erić MD, Dzunic D, Pantic M. Influence of Al2o3 Particle Content on the Sliding Wear Behaviour of Za-27 Alloy Composites. in Journal of the Balkan Tribological Association. 2012;18(4):548-558.
https://hdl.handle.net/21.15107/rcub_vinar_5274 .

Mitrovic, S., Babic, M., Zivic, F., Bobić, Ilija, Erić, Milić D., Dzunic, D., Pantic, M., "Influence of Al2o3 Particle Content on the Sliding Wear Behaviour of Za-27 Alloy Composites" in Journal of the Balkan Tribological Association, 18, no. 4 (2012):548-558,
https://hdl.handle.net/21.15107/rcub_vinar_5274 .

TY  - JOUR
AU  - Aćimović-Pavlović, Zagorka
AU  - Raic, K. T.
AU  - Bobić, Ilija
AU  - Bobić, Biljana M.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4380
AB  - Microstructures and compressive properties of Zn25Al3Cu/ZrO2 particulate composites were studied. The composites were obtained by compocasting process through infiltration of 1 and 3 wt% ZrO2 particles of different size into the semi-solid melt of the base alloy. The influence of reinforcing particles size and quantity on microstructure and mechanical properties of the composites was examined. The composites have shown significant improvement of mechanical properties with respect to the base alloy. Increase in hardness and compressive yield strength of the composites was more expressed in the composites with coarse ZrO2 particles. (C) Koninklijke Brill NV, Leiden, 2011
T2  - Advanced Composite Materials
T1  - Synthesis of ZrO2 Particles Reinforced ZA25 Alloy Composites by Compocasting Process
VL  - 20
IS  - 4
SP  - 375
EP  - 384
DO  - 10.1163/092430411X558512
ER  - 

@article{
author = "Aćimović-Pavlović, Zagorka and Raic, K. T. and Bobić, Ilija and Bobić, Biljana M.",
year = "2011",
abstract = "Microstructures and compressive properties of Zn25Al3Cu/ZrO2 particulate composites were studied. The composites were obtained by compocasting process through infiltration of 1 and 3 wt% ZrO2 particles of different size into the semi-solid melt of the base alloy. The influence of reinforcing particles size and quantity on microstructure and mechanical properties of the composites was examined. The composites have shown significant improvement of mechanical properties with respect to the base alloy. Increase in hardness and compressive yield strength of the composites was more expressed in the composites with coarse ZrO2 particles. (C) Koninklijke Brill NV, Leiden, 2011",
journal = "Advanced Composite Materials",
title = "Synthesis of ZrO2 Particles Reinforced ZA25 Alloy Composites by Compocasting Process",
volume = "20",
number = "4",
pages = "375-384",
doi = "10.1163/092430411X558512"
}

Aćimović-Pavlović, Z., Raic, K. T., Bobić, I.,& Bobić, B. M.. (2011). Synthesis of ZrO2 Particles Reinforced ZA25 Alloy Composites by Compocasting Process. in Advanced Composite Materials, 20(4), 375-384.
https://doi.org/10.1163/092430411X558512

Aćimović-Pavlović Z, Raic KT, Bobić I, Bobić BM. Synthesis of ZrO2 Particles Reinforced ZA25 Alloy Composites by Compocasting Process. in Advanced Composite Materials. 2011;20(4):375-384.
doi:10.1163/092430411X558512 .

Aćimović-Pavlović, Zagorka, Raic, K. T., Bobić, Ilija, Bobić, Biljana M., "Synthesis of ZrO2 Particles Reinforced ZA25 Alloy Composites by Compocasting Process" in Advanced Composite Materials, 20, no. 4 (2011):375-384,
https://doi.org/10.1163/092430411X558512 . .

TY  - JOUR
AU  - Bobić, Biljana M.
AU  - Bajat, Jelena B.
AU  - Aćimović-Pavlović, Zagorka
AU  - Rakin, Marko P.
AU  - Bobić, Ilija
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4160
AB  - The effect of heat treatment on the microstructure and corrosion behaviour of Zn27Al1 5CuO 02Mg alloy was examined The alloy was prepared by melting and casting route and then thermally processed (T4 regime) Corrosion behaviour of the as-cast and heat treated alloy was studied in 3 5 wt % NaCl solution using immersion method and electrochemical polarization measurements The applied heat treatment affected the alloy microstructure and resulted in increased ductility and higher corrosion resistance of the heat treated alloy Electrochemical measurements of the corrosion rate at the free corrosion potential are in agreement with the results obtained using the weight loss method 2010 Elsevier Ltd All rights reserved
T2  - Corrosion Science
T1  - The effect of T4 heat treatment on the microstructure and corrosion behaviour of Zn27Al1.5Cu0.02Mg alloy
VL  - 53
IS  - 1
SP  - 409
EP  - 417
DO  - 10.1016/j.corsci.2010.09.051
ER  - 

@article{
author = "Bobić, Biljana M. and Bajat, Jelena B. and Aćimović-Pavlović, Zagorka and Rakin, Marko P. and Bobić, Ilija",
year = "2011",
abstract = "The effect of heat treatment on the microstructure and corrosion behaviour of Zn27Al1 5CuO 02Mg alloy was examined The alloy was prepared by melting and casting route and then thermally processed (T4 regime) Corrosion behaviour of the as-cast and heat treated alloy was studied in 3 5 wt % NaCl solution using immersion method and electrochemical polarization measurements The applied heat treatment affected the alloy microstructure and resulted in increased ductility and higher corrosion resistance of the heat treated alloy Electrochemical measurements of the corrosion rate at the free corrosion potential are in agreement with the results obtained using the weight loss method 2010 Elsevier Ltd All rights reserved",
journal = "Corrosion Science",
title = "The effect of T4 heat treatment on the microstructure and corrosion behaviour of Zn27Al1.5Cu0.02Mg alloy",
volume = "53",
number = "1",
pages = "409-417",
doi = "10.1016/j.corsci.2010.09.051"
}

Bobić, B. M., Bajat, J. B., Aćimović-Pavlović, Z., Rakin, M. P.,& Bobić, I.. (2011). The effect of T4 heat treatment on the microstructure and corrosion behaviour of Zn27Al1.5Cu0.02Mg alloy. in Corrosion Science, 53(1), 409-417.
https://doi.org/10.1016/j.corsci.2010.09.051

Bobić BM, Bajat JB, Aćimović-Pavlović Z, Rakin MP, Bobić I. The effect of T4 heat treatment on the microstructure and corrosion behaviour of Zn27Al1.5Cu0.02Mg alloy. in Corrosion Science. 2011;53(1):409-417.
doi:10.1016/j.corsci.2010.09.051 .

Bobić, Biljana M., Bajat, Jelena B., Aćimović-Pavlović, Zagorka, Rakin, Marko P., Bobić, Ilija, "The effect of T4 heat treatment on the microstructure and corrosion behaviour of Zn27Al1.5Cu0.02Mg alloy" in Corrosion Science, 53, no. 1 (2011):409-417,
https://doi.org/10.1016/j.corsci.2010.09.051 . .

TY  - JOUR
AU  - Bobić, Biljana M.
AU  - Babić, Miroslav
AU  - Mitrovic, Slobodan
AU  - Ilić, Nenad
AU  - Bobić, Ilija
AU  - Jovanović, Milan T.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4183
AB  - Microstructures and compressive properties of Zn25Al3Cu alloy and Zn25Al3Cu/Al2O3 particulate composites with large reinforcing particles (250 mu m) were examined. The composites were obtained by the compocasting technique through infiltration of 3, 8 and 16 wt.% Al2O3 particles into the semi-solid metal matrix. The influence of temperature in the range from 70 to 170 degrees C on compressive yield strength of the matrix alloy (as-cast and thixocast Zn25Al3Cu alloy) and the composites was investigated. Above 70 degrees C compressive yield strength of all materials decreases, but the rate of decrease is different for the matrix alloy (as-cast and thixocast) and composites. It was found that the abrupt decrease in compressive yield strength of the matrix alloy occurred at temperatures higher than 70 degrees C, whereas composites retained relatively high values of compressive yield strength till the end of the testing temperature range regardless of the amount of reinforcing particles.
T2  - International Journal of Materials Research
T1  - Microstructure and mechanical properties of Zn25Al3Cu based composites with large Al2O3 particles at room and elevated temperatures
VL  - 101
IS  - 12
SP  - 1524
EP  - 1531
DO  - 10.3139/146.110425
ER  - 

@article{
author = "Bobić, Biljana M. and Babić, Miroslav and Mitrovic, Slobodan and Ilić, Nenad and Bobić, Ilija and Jovanović, Milan T.",
year = "2010",
abstract = "Microstructures and compressive properties of Zn25Al3Cu alloy and Zn25Al3Cu/Al2O3 particulate composites with large reinforcing particles (250 mu m) were examined. The composites were obtained by the compocasting technique through infiltration of 3, 8 and 16 wt.% Al2O3 particles into the semi-solid metal matrix. The influence of temperature in the range from 70 to 170 degrees C on compressive yield strength of the matrix alloy (as-cast and thixocast Zn25Al3Cu alloy) and the composites was investigated. Above 70 degrees C compressive yield strength of all materials decreases, but the rate of decrease is different for the matrix alloy (as-cast and thixocast) and composites. It was found that the abrupt decrease in compressive yield strength of the matrix alloy occurred at temperatures higher than 70 degrees C, whereas composites retained relatively high values of compressive yield strength till the end of the testing temperature range regardless of the amount of reinforcing particles.",
journal = "International Journal of Materials Research",
title = "Microstructure and mechanical properties of Zn25Al3Cu based composites with large Al2O3 particles at room and elevated temperatures",
volume = "101",
number = "12",
pages = "1524-1531",
doi = "10.3139/146.110425"
}

Bobić, B. M., Babić, M., Mitrovic, S., Ilić, N., Bobić, I.,& Jovanović, M. T.. (2010). Microstructure and mechanical properties of Zn25Al3Cu based composites with large Al2O3 particles at room and elevated temperatures. in International Journal of Materials Research, 101(12), 1524-1531.
https://doi.org/10.3139/146.110425

Bobić BM, Babić M, Mitrovic S, Ilić N, Bobić I, Jovanović MT. Microstructure and mechanical properties of Zn25Al3Cu based composites with large Al2O3 particles at room and elevated temperatures. in International Journal of Materials Research. 2010;101(12):1524-1531.
doi:10.3139/146.110425 .

Bobić, Biljana M., Babić, Miroslav, Mitrovic, Slobodan, Ilić, Nenad, Bobić, Ilija, Jovanović, Milan T., "Microstructure and mechanical properties of Zn25Al3Cu based composites with large Al2O3 particles at room and elevated temperatures" in International Journal of Materials Research, 101, no. 12 (2010):1524-1531,
https://doi.org/10.3139/146.110425 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Arostegui, Saioa
AU  - Bobić, Biljana M.
AU  - Marinković, Aleksandar D.
AU  - Babić, Miroslav
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4122
AB  - Particulate composites with A356 aluminium alloy as a matrix were produced by compocasting process using ceramic particles (Al2O3, SiC) and graphite particles. The matrix alloy and the composites were thermally processed applying the T6 heat treatment regime. Structural, mechanical and tribological properties of heat treated matrix alloy and the composites were examined and compared. It was shown that heat treatment affected microstructure of the composites matrix. The fracture of the composites matrix was ductile, while transition from ductile to brittle fracture occurred in the zone of reinforcing particles. The values of elasticity modulus of all the composites were higher in relation to the matrix alloy. It was also established that wear resistance and coefficient of friction were better at the SiC particulate composites than at the Al2O3 particulate composite, while the addition of graphite particles improved tribological properties further. (c) 2010 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Structural, mechanical and tribological properties of A356 aluminium alloy reinforced with Al2O3, SiC and SiC plus graphite particles
VL  - 506
IS  - 2
SP  - 631
EP  - 639
DO  - 10.1016/j.jallcom.2010.07.028
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Ilija and Arostegui, Saioa and Bobić, Biljana M. and Marinković, Aleksandar D. and Babić, Miroslav",
year = "2010",
abstract = "Particulate composites with A356 aluminium alloy as a matrix were produced by compocasting process using ceramic particles (Al2O3, SiC) and graphite particles. The matrix alloy and the composites were thermally processed applying the T6 heat treatment regime. Structural, mechanical and tribological properties of heat treated matrix alloy and the composites were examined and compared. It was shown that heat treatment affected microstructure of the composites matrix. The fracture of the composites matrix was ductile, while transition from ductile to brittle fracture occurred in the zone of reinforcing particles. The values of elasticity modulus of all the composites were higher in relation to the matrix alloy. It was also established that wear resistance and coefficient of friction were better at the SiC particulate composites than at the Al2O3 particulate composite, while the addition of graphite particles improved tribological properties further. (c) 2010 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Structural, mechanical and tribological properties of A356 aluminium alloy reinforced with Al2O3, SiC and SiC plus graphite particles",
volume = "506",
number = "2",
pages = "631-639",
doi = "10.1016/j.jallcom.2010.07.028"
}

Vencl, A., Bobić, I., Arostegui, S., Bobić, B. M., Marinković, A. D.,& Babić, M.. (2010). Structural, mechanical and tribological properties of A356 aluminium alloy reinforced with Al2O3, SiC and SiC plus graphite particles. in Journal of Alloys and Compounds, 506(2), 631-639.
https://doi.org/10.1016/j.jallcom.2010.07.028

Vencl A, Bobić I, Arostegui S, Bobić BM, Marinković AD, Babić M. Structural, mechanical and tribological properties of A356 aluminium alloy reinforced with Al2O3, SiC and SiC plus graphite particles. in Journal of Alloys and Compounds. 2010;506(2):631-639.
doi:10.1016/j.jallcom.2010.07.028 .

Vencl, Aleksandar, Bobić, Ilija, Arostegui, Saioa, Bobić, Biljana M., Marinković, Aleksandar D., Babić, Miroslav, "Structural, mechanical and tribological properties of A356 aluminium alloy reinforced with Al2O3, SiC and SiC plus graphite particles" in Journal of Alloys and Compounds, 506, no. 2 (2010):631-639,
https://doi.org/10.1016/j.jallcom.2010.07.028 . .

TY  - JOUR
AU  - Babić, Miroslav
AU  - Slobodan, Mitrovic
AU  - Dzunic, Dragan
AU  - Jeremic, Branislav
AU  - Bobić, Ilija
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3887
AB  - The objective of this investigation is to assess the influence of graphite reinforcement on tribological behavior of ZA-27 alloy. The composite with 2 wt% of graphite particles was produced by the compocasting procedure. Tribological properties of unreinforced alloy and composite were studied, using block-on-disk tribometer, under dry and lubricated sliding conditions at different specific loads and sliding speeds. The worn surfaces of the samples were examined by the scanning electron microscopy (SEM). The obtained results revealed that ZA-27/graphite composite specimens exhibited significantly lower wear rate and coefficient of friction than the matrix alloy specimens in all the combinations of applied loads (F (n) ) and sliding speeds (v) in dry and lubricated tests. The positive tribological effects of graphite reinforcement of ZA-27 in dry sliding tests were provided by the tribo-induced graphite film on the contact surface of composite. In test conditions, characterized by the small graphite content and modest sliding speeds and applied loads, nonuniform tribo-induced graphite films were formed leading to the increase of the friction coefficient and wear rate, with increase of the sliding speed and applied load. In conditions of lubricated sliding, the very fine graphite particles formed in the contact interface mix with the lubricating oil forming the emulsion with improved tribological characteristics. Smeared graphite decreased the negative influence of F (n) on tribological response of composites, what is manifested by the mild regime of the boundary lubrication, as well as by realization of the mixed lubrication at lower values of the v/F (n) ratio, with respect to the matrix alloy.
T2  - Tribology Letters
T1  - Tribological Behavior of Composites Based on ZA-27 Alloy Reinforced with Graphite Particles
VL  - 37
IS  - 2
SP  - 401
EP  - 410
DO  - 10.1007/s11249-009-9535-2
ER  - 

@article{
author = "Babić, Miroslav and Slobodan, Mitrovic and Dzunic, Dragan and Jeremic, Branislav and Bobić, Ilija",
year = "2010",
abstract = "The objective of this investigation is to assess the influence of graphite reinforcement on tribological behavior of ZA-27 alloy. The composite with 2 wt% of graphite particles was produced by the compocasting procedure. Tribological properties of unreinforced alloy and composite were studied, using block-on-disk tribometer, under dry and lubricated sliding conditions at different specific loads and sliding speeds. The worn surfaces of the samples were examined by the scanning electron microscopy (SEM). The obtained results revealed that ZA-27/graphite composite specimens exhibited significantly lower wear rate and coefficient of friction than the matrix alloy specimens in all the combinations of applied loads (F (n) ) and sliding speeds (v) in dry and lubricated tests. The positive tribological effects of graphite reinforcement of ZA-27 in dry sliding tests were provided by the tribo-induced graphite film on the contact surface of composite. In test conditions, characterized by the small graphite content and modest sliding speeds and applied loads, nonuniform tribo-induced graphite films were formed leading to the increase of the friction coefficient and wear rate, with increase of the sliding speed and applied load. In conditions of lubricated sliding, the very fine graphite particles formed in the contact interface mix with the lubricating oil forming the emulsion with improved tribological characteristics. Smeared graphite decreased the negative influence of F (n) on tribological response of composites, what is manifested by the mild regime of the boundary lubrication, as well as by realization of the mixed lubrication at lower values of the v/F (n) ratio, with respect to the matrix alloy.",
journal = "Tribology Letters",
title = "Tribological Behavior of Composites Based on ZA-27 Alloy Reinforced with Graphite Particles",
volume = "37",
number = "2",
pages = "401-410",
doi = "10.1007/s11249-009-9535-2"
}

Babić, M., Slobodan, M., Dzunic, D., Jeremic, B.,& Bobić, I.. (2010). Tribological Behavior of Composites Based on ZA-27 Alloy Reinforced with Graphite Particles. in Tribology Letters, 37(2), 401-410.
https://doi.org/10.1007/s11249-009-9535-2

Babić M, Slobodan M, Dzunic D, Jeremic B, Bobić I. Tribological Behavior of Composites Based on ZA-27 Alloy Reinforced with Graphite Particles. in Tribology Letters. 2010;37(2):401-410.
doi:10.1007/s11249-009-9535-2 .

Babić, Miroslav, Slobodan, Mitrovic, Dzunic, Dragan, Jeremic, Branislav, Bobić, Ilija, "Tribological Behavior of Composites Based on ZA-27 Alloy Reinforced with Graphite Particles" in Tribology Letters, 37, no. 2 (2010):401-410,
https://doi.org/10.1007/s11249-009-9535-2 . .

TY  - JOUR
AU  - Babić, Miroslav
AU  - Mitrovic, Slobodan
AU  - Živić, Fatima
AU  - Bobić, Ilija
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4012
AB  - In present study, the effect of Al2O3 particle reinforcement on the sliding behavior of ZA-27 alloy composites was investigated. The composites with 3, 5, and 10 wt% of Al2O3 particles were produced by the compocasting procedure. Tribological properties of unreinforced alloy and composite were studied, using block-on-disk tribometer under unlubricated sliding conditions at different specific loads and sliding speeds. The worn surfaces of samples were examined by the scanning electron microscopy (SEM). The test results revealed that those composite specimens exhibited significantly lower wear rate than the ZA-27 matrix alloy specimens in all combinations of applied loads and sliding speeds. The difference in the wear resistance of composite with respect to the matrix alloy, increased with the increase of the applied load/sliding speed and Al2O3 particle content. The highest degree of improvement of the ZA-27 alloy tribological behavior corresponded with change of the Al2O3 particles content from 3 to 5 wt%. At low sliding speed, moderate lower wear rate of the composites over that of the matrix alloy was noticed. This has been attributed to micro cracking tendency of the composites. Significantly reduced wear rate, experienced by the composite over that of the matrix alloy at the higher sliding speeds and loads, could be explained due to enhanced compatibility of matrix alloy with dispersoid phase and greater thermal stability of the composite in view of the presence of the dispersoid. Level of wear rate of tested ZA-27/Al2O3 samples pointed to the process of mild wear, which was primarily controlled by the formation and destruction of mechanical mixed layers (MMLs).
T2  - Tribology Letters
T1  - Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition
VL  - 38
IS  - 3
SP  - 337
EP  - 346
DO  - 10.1007/s11249-010-9613-5
ER  - 

@article{
author = "Babić, Miroslav and Mitrovic, Slobodan and Živić, Fatima and Bobić, Ilija",
year = "2010",
abstract = "In present study, the effect of Al2O3 particle reinforcement on the sliding behavior of ZA-27 alloy composites was investigated. The composites with 3, 5, and 10 wt% of Al2O3 particles were produced by the compocasting procedure. Tribological properties of unreinforced alloy and composite were studied, using block-on-disk tribometer under unlubricated sliding conditions at different specific loads and sliding speeds. The worn surfaces of samples were examined by the scanning electron microscopy (SEM). The test results revealed that those composite specimens exhibited significantly lower wear rate than the ZA-27 matrix alloy specimens in all combinations of applied loads and sliding speeds. The difference in the wear resistance of composite with respect to the matrix alloy, increased with the increase of the applied load/sliding speed and Al2O3 particle content. The highest degree of improvement of the ZA-27 alloy tribological behavior corresponded with change of the Al2O3 particles content from 3 to 5 wt%. At low sliding speed, moderate lower wear rate of the composites over that of the matrix alloy was noticed. This has been attributed to micro cracking tendency of the composites. Significantly reduced wear rate, experienced by the composite over that of the matrix alloy at the higher sliding speeds and loads, could be explained due to enhanced compatibility of matrix alloy with dispersoid phase and greater thermal stability of the composite in view of the presence of the dispersoid. Level of wear rate of tested ZA-27/Al2O3 samples pointed to the process of mild wear, which was primarily controlled by the formation and destruction of mechanical mixed layers (MMLs).",
journal = "Tribology Letters",
title = "Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition",
volume = "38",
number = "3",
pages = "337-346",
doi = "10.1007/s11249-010-9613-5"
}

Babić, M., Mitrovic, S., Živić, F.,& Bobić, I.. (2010). Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition. in Tribology Letters, 38(3), 337-346.
https://doi.org/10.1007/s11249-010-9613-5

Babić M, Mitrovic S, Živić F, Bobić I. Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition. in Tribology Letters. 2010;38(3):337-346.
doi:10.1007/s11249-010-9613-5 .

Babić, Miroslav, Mitrovic, Slobodan, Živić, Fatima, Bobić, Ilija, "Wear Behavior of Composites Based on ZA-27 Alloy Reinforced by Al2O3 Particles Under Dry Sliding Condition" in Tribology Letters, 38, no. 3 (2010):337-346,
https://doi.org/10.1007/s11249-010-9613-5 . .

TY  - JOUR
AU  - Babić, Miroslav
AU  - Vencl, Aleksandar
AU  - Mitrovic, Slobodan
AU  - Bobić, Ilija
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3795
AB  - The effects of heat treatment on the microstructure, hardness, tensile properties, and tribological behavior of ZA27 alloy were examined. The alloys were prepared by conventional melting and casting route. The heat treatment of samples included the heating up to 370 A degrees C for 3 or 5 h, quenching in water, and natural aging. Lubricated sliding wear test were conducted on as-cast and heat-treated ZA27 samples using block-on-disc machine. The friction and wear behavior of alloys were tested in contact with steel discs using combinations of three levels of load (10, 30, and 50 N) and three levels of linear sliding speeds (0.26, 0.50, and 1.00 m/s). To determine the wear mechanisms, the worn surfaces of the samples were examined by scanning electron microscopy (SEM). The heat treatment resulted in reduction in the hardness and tensile strength but increase in elongation. The heat-treated alloy samples attained improved tribological behavior over the as-cast ones, under all combinations of sliding speeds and contact loads. The rate of improvement increased with duration of solutionizing process before quenching in water. Obtained tribological results were related to the effects of heat treatment on microstructure changes of alloy.
T2  - Tribology Letters
T1  - Influence of T4 Heat Treatment on Tribological Behavior of Za27 Alloy Under Lubricated Sliding Condition
VL  - 36
IS  - 2
SP  - 125
EP  - 134
DO  - 10.1007/s11249-009-9467-x
ER  - 

@article{
author = "Babić, Miroslav and Vencl, Aleksandar and Mitrovic, Slobodan and Bobić, Ilija",
year = "2009",
abstract = "The effects of heat treatment on the microstructure, hardness, tensile properties, and tribological behavior of ZA27 alloy were examined. The alloys were prepared by conventional melting and casting route. The heat treatment of samples included the heating up to 370 A degrees C for 3 or 5 h, quenching in water, and natural aging. Lubricated sliding wear test were conducted on as-cast and heat-treated ZA27 samples using block-on-disc machine. The friction and wear behavior of alloys were tested in contact with steel discs using combinations of three levels of load (10, 30, and 50 N) and three levels of linear sliding speeds (0.26, 0.50, and 1.00 m/s). To determine the wear mechanisms, the worn surfaces of the samples were examined by scanning electron microscopy (SEM). The heat treatment resulted in reduction in the hardness and tensile strength but increase in elongation. The heat-treated alloy samples attained improved tribological behavior over the as-cast ones, under all combinations of sliding speeds and contact loads. The rate of improvement increased with duration of solutionizing process before quenching in water. Obtained tribological results were related to the effects of heat treatment on microstructure changes of alloy.",
journal = "Tribology Letters",
title = "Influence of T4 Heat Treatment on Tribological Behavior of Za27 Alloy Under Lubricated Sliding Condition",
volume = "36",
number = "2",
pages = "125-134",
doi = "10.1007/s11249-009-9467-x"
}

Babić, M., Vencl, A., Mitrovic, S.,& Bobić, I.. (2009). Influence of T4 Heat Treatment on Tribological Behavior of Za27 Alloy Under Lubricated Sliding Condition. in Tribology Letters, 36(2), 125-134.
https://doi.org/10.1007/s11249-009-9467-x

Babić M, Vencl A, Mitrovic S, Bobić I. Influence of T4 Heat Treatment on Tribological Behavior of Za27 Alloy Under Lubricated Sliding Condition. in Tribology Letters. 2009;36(2):125-134.
doi:10.1007/s11249-009-9467-x .

Babić, Miroslav, Vencl, Aleksandar, Mitrovic, Slobodan, Bobić, Ilija, "Influence of T4 Heat Treatment on Tribological Behavior of Za27 Alloy Under Lubricated Sliding Condition" in Tribology Letters, 36, no. 2 (2009):125-134,
https://doi.org/10.1007/s11249-009-9467-x . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Jovanović, Milan T.
AU  - Babić, Miroslav
AU  - Mitovic, Slobodan
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3572
AB  - In the present study, the effect of the Al2O3 particles (average size of 12 mu m, 3 and 10 wt.%) reinforcement on the microstructure and tribological properties of Al-Si alloy (A356) was investigated. Composites were produced by applying compocasting process. Tribological properties of unreinforced alloy and composites were studied, using pin-on-disc tribometer, under dry sliding conditions at different specific loads and sliding speed of 1 m/s. Microhardness measurements, optical microscope and scanning electron microscope were used for microstructural characterization and investigation of worn surfaces and wear debris. During compocasting of A356 alloy, a transformation from a typical dendritic primary alpha phase to a non-dendritic rosette-like structure occurred. Composites exhibited better wear resistance compared with unreinforced alloy. Presence of 3 wt.% Al2O3 particles in the composite material affected the wear resistance only at specific loads up to 1 MPa. The wear rate of composite with 10 wt.% Al2O3 particles was nearly two order of the magnitude lower than the wear rate of the matrix alloy. Dominant wear mechanism for all materials was adhesion, with others mechanisms: oxidation, abrasion and delamination as minor ones.
T2  - Tribology Letters
T1  - Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles
VL  - 32
IS  - 3
SP  - 159
EP  - 170
DO  - 10.1007/s11249-008-9374-6
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Ilija and Jovanović, Milan T. and Babić, Miroslav and Mitovic, Slobodan",
year = "2008",
abstract = "In the present study, the effect of the Al2O3 particles (average size of 12 mu m, 3 and 10 wt.%) reinforcement on the microstructure and tribological properties of Al-Si alloy (A356) was investigated. Composites were produced by applying compocasting process. Tribological properties of unreinforced alloy and composites were studied, using pin-on-disc tribometer, under dry sliding conditions at different specific loads and sliding speed of 1 m/s. Microhardness measurements, optical microscope and scanning electron microscope were used for microstructural characterization and investigation of worn surfaces and wear debris. During compocasting of A356 alloy, a transformation from a typical dendritic primary alpha phase to a non-dendritic rosette-like structure occurred. Composites exhibited better wear resistance compared with unreinforced alloy. Presence of 3 wt.% Al2O3 particles in the composite material affected the wear resistance only at specific loads up to 1 MPa. The wear rate of composite with 10 wt.% Al2O3 particles was nearly two order of the magnitude lower than the wear rate of the matrix alloy. Dominant wear mechanism for all materials was adhesion, with others mechanisms: oxidation, abrasion and delamination as minor ones.",
journal = "Tribology Letters",
title = "Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles",
volume = "32",
number = "3",
pages = "159-170",
doi = "10.1007/s11249-008-9374-6"
}

Vencl, A., Bobić, I., Jovanović, M. T., Babić, M.,& Mitovic, S.. (2008). Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles. in Tribology Letters, 32(3), 159-170.
https://doi.org/10.1007/s11249-008-9374-6

Vencl A, Bobić I, Jovanović MT, Babić M, Mitovic S. Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles. in Tribology Letters. 2008;32(3):159-170.
doi:10.1007/s11249-008-9374-6 .

Vencl, Aleksandar, Bobić, Ilija, Jovanović, Milan T., Babić, Miroslav, Mitovic, Slobodan, "Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles" in Tribology Letters, 32, no. 3 (2008):159-170,
https://doi.org/10.1007/s11249-008-9374-6 . .