TY  - PAT
AU  - Grahovac, Nebojša
AU  - Pavkov, Vladimir
AU  - Stanković, Srboljub
AU  - Matović, Branko
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11660
AB  - Postupak primene reznog alata sa dijamantskom prevlakom pri obradi legure Al-12%Si i kompozita staklena vlakna/poliesterska smola na strugu je u primeni otpornosti na habanje reznog alata sa dijamantskom prevlakom i površinske hrapavosti obrađivanih površinana definisanje optimalnih režima obrade pomenutih materijala na CNC strugu. Postupak se sastoji od tri faze: 1. Određivanje krive habanja alata sa dijamantskom prevlakom pri mašinskoj obradi legure i kompozita na strugu. 2. Određivanje dijagrama površinske hrapavosti za dati rezni alat. 3. Analiza reznih ivica dijamantskog alata primenom skenirajućeg elektronskog mikroskopa (SEM).
AB  - The procedure for application of cutting tools with diamond coating in the processing of Al-12% Si alloy and glass fiber / polyester resin composites on lathe is in the application of wear resistance of cutting tools with diamond coating and surface roughness of machined surfaces defining optimal processing modes. The procedure consists of three phases: 1. Determination of the wear curve of tools with diamond coating during machining of alloys and composites on a lathe. 2. Determining the surface roughness diagram for a given cutting tool. 3. Analysis of cutting edges of diamond tools using scanning electron microscope (SEM).
T2  - Zavod za intelektualnu svojinu Republike Srbije
T1  - Postupak primene reznog alata sa dijamantskom prevlakom pri obradi legure Al-12%Si i kompozita staklena vlakna/poliesterska smola na strugu
T1  - Procedure for application of cutting tools with diamond coating in the processing of Al-12% Si alloy and glass fiber / polyester resin composites on lathe
VL  - 102
IS  - 7
SP  - 8
EP  - 8
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11660
ER  - 

@misc{
author = "Grahovac, Nebojša and Pavkov, Vladimir and Stanković, Srboljub and Matović, Branko",
year = "2022",
abstract = "Postupak primene reznog alata sa dijamantskom prevlakom pri obradi legure Al-12%Si i kompozita staklena vlakna/poliesterska smola na strugu je u primeni otpornosti na habanje reznog alata sa dijamantskom prevlakom i površinske hrapavosti obrađivanih površinana definisanje optimalnih režima obrade pomenutih materijala na CNC strugu. Postupak se sastoji od tri faze: 1. Određivanje krive habanja alata sa dijamantskom prevlakom pri mašinskoj obradi legure i kompozita na strugu. 2. Određivanje dijagrama površinske hrapavosti za dati rezni alat. 3. Analiza reznih ivica dijamantskog alata primenom skenirajućeg elektronskog mikroskopa (SEM)., The procedure for application of cutting tools with diamond coating in the processing of Al-12% Si alloy and glass fiber / polyester resin composites on lathe is in the application of wear resistance of cutting tools with diamond coating and surface roughness of machined surfaces defining optimal processing modes. The procedure consists of three phases: 1. Determination of the wear curve of tools with diamond coating during machining of alloys and composites on a lathe. 2. Determining the surface roughness diagram for a given cutting tool. 3. Analysis of cutting edges of diamond tools using scanning electron microscope (SEM).",
journal = "Zavod za intelektualnu svojinu Republike Srbije",
title = "Postupak primene reznog alata sa dijamantskom prevlakom pri obradi legure Al-12%Si i kompozita staklena vlakna/poliesterska smola na strugu, Procedure for application of cutting tools with diamond coating in the processing of Al-12% Si alloy and glass fiber / polyester resin composites on lathe",
volume = "102",
number = "7",
pages = "8-8",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11660"
}

Grahovac, N., Pavkov, V., Stanković, S.,& Matović, B.. (2022). Postupak primene reznog alata sa dijamantskom prevlakom pri obradi legure Al-12%Si i kompozita staklena vlakna/poliesterska smola na strugu. in Zavod za intelektualnu svojinu Republike Srbije, 102(7), 8-8.
https://hdl.handle.net/21.15107/rcub_vinar_11660

Grahovac N, Pavkov V, Stanković S, Matović B. Postupak primene reznog alata sa dijamantskom prevlakom pri obradi legure Al-12%Si i kompozita staklena vlakna/poliesterska smola na strugu. in Zavod za intelektualnu svojinu Republike Srbije. 2022;102(7):8-8.
https://hdl.handle.net/21.15107/rcub_vinar_11660 .

Grahovac, Nebojša, Pavkov, Vladimir, Stanković, Srboljub, Matović, Branko, "Postupak primene reznog alata sa dijamantskom prevlakom pri obradi legure Al-12%Si i kompozita staklena vlakna/poliesterska smola na strugu" in Zavod za intelektualnu svojinu Republike Srbije, 102, no. 7 (2022):8-8,
https://hdl.handle.net/21.15107/rcub_vinar_11660 .

TY  - PAT
AU  - Grahovac, Nebojša
AU  - Pavkov, Vladimir
AU  - Maksimović, Vesna
AU  - Matović, Branko
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11664
AB  - Postupak ocene obradljivosti superlegura mašinskom obradom je postupak u kome se primenjuju tri kriterijuma obradljivosti: ocena obradljivosti preko postojanosti alata, ocena obradljivosti preko temperatura pri mašinskoj obradi rezanjem i ocena obradljivosti na osnovu oblika i stepena deformisanosti strugotine. Za određivanje ovih ocena korišćeni su eksperimentalni podaci dobijeni snimanjem toka habanja alata, merenjem temperatura u zoni rezanja i određivanjem vrednosti faktora sabijanja strugotine pri obradi superlegura na bazi nikla IN-100 i MAR-M247.
AB  - The machinability assessment procedure of superalloys is a procedure in which three machinability criteria are applied: machinability assessment based on tool stability, machinability assessment based on cutting temperatures and machinability assessment based on the shape and degree of chip deformation. To determine these assesments, experimental data obtained by recording tool wear process, measuring temperatures in the cutting zone and determining the value of the chip compaction factor when processing nickel-based superalloys IN-100 and MAR-M247 were used.
T2  - Zavod za intelektualnu svojinu Republike Srbije
T1  - Postupak ocene obradljivosti superlegura mašinskom obradom
T1  - Machinability assesment procedure of superalloys
VL  - 102
IS  - 9
SP  - 9
EP  - 9
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11664
ER  - 

@misc{
author = "Grahovac, Nebojša and Pavkov, Vladimir and Maksimović, Vesna and Matović, Branko",
year = "2022",
abstract = "Postupak ocene obradljivosti superlegura mašinskom obradom je postupak u kome se primenjuju tri kriterijuma obradljivosti: ocena obradljivosti preko postojanosti alata, ocena obradljivosti preko temperatura pri mašinskoj obradi rezanjem i ocena obradljivosti na osnovu oblika i stepena deformisanosti strugotine. Za određivanje ovih ocena korišćeni su eksperimentalni podaci dobijeni snimanjem toka habanja alata, merenjem temperatura u zoni rezanja i određivanjem vrednosti faktora sabijanja strugotine pri obradi superlegura na bazi nikla IN-100 i MAR-M247., The machinability assessment procedure of superalloys is a procedure in which three machinability criteria are applied: machinability assessment based on tool stability, machinability assessment based on cutting temperatures and machinability assessment based on the shape and degree of chip deformation. To determine these assesments, experimental data obtained by recording tool wear process, measuring temperatures in the cutting zone and determining the value of the chip compaction factor when processing nickel-based superalloys IN-100 and MAR-M247 were used.",
journal = "Zavod za intelektualnu svojinu Republike Srbije",
title = "Postupak ocene obradljivosti superlegura mašinskom obradom, Machinability assesment procedure of superalloys",
volume = "102",
number = "9",
pages = "9-9",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11664"
}

Grahovac, N., Pavkov, V., Maksimović, V.,& Matović, B.. (2022). Postupak ocene obradljivosti superlegura mašinskom obradom. in Zavod za intelektualnu svojinu Republike Srbije, 102(9), 9-9.
https://hdl.handle.net/21.15107/rcub_vinar_11664

Grahovac N, Pavkov V, Maksimović V, Matović B. Postupak ocene obradljivosti superlegura mašinskom obradom. in Zavod za intelektualnu svojinu Republike Srbije. 2022;102(9):9-9.
https://hdl.handle.net/21.15107/rcub_vinar_11664 .

Grahovac, Nebojša, Pavkov, Vladimir, Maksimović, Vesna, Matović, Branko, "Postupak ocene obradljivosti superlegura mašinskom obradom" in Zavod za intelektualnu svojinu Republike Srbije, 102, no. 9 (2022):9-9,
https://hdl.handle.net/21.15107/rcub_vinar_11664 .

TY  - PAT
AU  - Grahovac, Nebojša
AU  - Stanković, Srboljub
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12127
AB  - Postupak analize ponašanja rashladnog uređaja pri promenljivim opterećenjima se sastoji iz sledećih faza: faza (1), matematička simulacija rada uređaja u celini i komponenti uređaja; faza (1.1), razmatranje karakteristika pojedinih komponenti uređaja za određene radne uslove; faza (1.2), dobijanje radnih karakteristika uređaja u celini i faza (2), eksperimentalna analiza ponašanja uređaja pri promenljivim opterećenjima. Osnov
AB  - Method of analyzing the behavior of a refrigeration device under variable loads consists of step (1) of mathematical simulation of device operation process as a whole and device components; step (1.1) of consideration of the characteristics of individual components of the device for certain operating conditions; step (1.2) to obtaining the operating features of the device and step (2) of experimental analysis of device behavior under variable loads. The novelty of the invention is implementation of steps (1, 1.1,1.2).
T2  - Zavod za intelektualnu svojinu Republike Srbije
T1  - Postupak analize ponašanja rashladnog uređaja pri promenljivim opterećenjima
T1  - Method of analyzing the behavior of a refrigeration device under variable loads
IS  - 6
SP  - 13
EP  - 13
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12127
ER  - 

@misc{
author = "Grahovac, Nebojša and Stanković, Srboljub",
year = "2022",
abstract = "Postupak analize ponašanja rashladnog uređaja pri promenljivim opterećenjima se sastoji iz sledećih faza: faza (1), matematička simulacija rada uređaja u celini i komponenti uređaja; faza (1.1), razmatranje karakteristika pojedinih komponenti uređaja za određene radne uslove; faza (1.2), dobijanje radnih karakteristika uređaja u celini i faza (2), eksperimentalna analiza ponašanja uređaja pri promenljivim opterećenjima. Osnov, Method of analyzing the behavior of a refrigeration device under variable loads consists of step (1) of mathematical simulation of device operation process as a whole and device components; step (1.1) of consideration of the characteristics of individual components of the device for certain operating conditions; step (1.2) to obtaining the operating features of the device and step (2) of experimental analysis of device behavior under variable loads. The novelty of the invention is implementation of steps (1, 1.1,1.2).",
journal = "Zavod za intelektualnu svojinu Republike Srbije",
title = "Postupak analize ponašanja rashladnog uređaja pri promenljivim opterećenjima, Method of analyzing the behavior of a refrigeration device under variable loads",
number = "6",
pages = "13-13",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12127"
}

Grahovac, N.,& Stanković, S.. (2022). Postupak analize ponašanja rashladnog uređaja pri promenljivim opterećenjima. in Zavod za intelektualnu svojinu Republike Srbije(6), 13-13.
https://hdl.handle.net/21.15107/rcub_vinar_12127

Grahovac N, Stanković S. Postupak analize ponašanja rashladnog uređaja pri promenljivim opterećenjima. in Zavod za intelektualnu svojinu Republike Srbije. 2022;(6):13-13.
https://hdl.handle.net/21.15107/rcub_vinar_12127 .

Grahovac, Nebojša, Stanković, Srboljub, "Postupak analize ponašanja rashladnog uređaja pri promenljivim opterećenjima" in Zavod za intelektualnu svojinu Republike Srbije, no. 6 (2022):13-13,
https://hdl.handle.net/21.15107/rcub_vinar_12127 .

TY  - PAT
AU  - Grahovac, Nebojša
AU  - Stanković, Srboljub
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12126
AB  - Postupak optimizacije rada rashladnih kompresora pomoću simulacije rada elektromotora kompresora i ventila kompresora u sklopu rada agregatiranih jedinica, se sastoji iz tri faze:matematička simulacija rada kompresora, uticaj ugrađenog elektromotora kompresora na rad kompresora i uticaj geometrijskih karakteristika ventila na rad kompresora. Novina pronalaska je u primeni druge i treće faze postupka. Iz postupka proističe da je neophodno ventile konstruktivno prilagođavati odgovarajućim elektromotorima tj. režimima rada rashladnih agregata.
AB  - The method for optimizing the operation of refrigeration compressors by simulating the operation of electric compressor motor and compressor valves within the operation of aggregate units, consists of three phases: mathematical simulation of compressor operation, the influence of the built-in electric motor of the compressor on the operation of the compressor and the influence of the geometric characteristics of the valve on the operation of the compressor. The novelty of the invention is implementation of the second and third phases of the method. It is necessary to constructively adopt the valves to correspond to the electric motor, ie. operating modes of refrigeration units.
T2  - Zavod za intelektualnu svojinu Republike Srbije
T1  - Postupak optimizacije rashladnog kompresora pomoću simulacije rada elektromotora kompresora i ventila kompresora u sklopu rada agregatnih jedinica
T1  - The method for optimizing refrigeration compressor by simulating the operation of compressor electric motor and compressor valves as part of the aggregate units operation
IS  - 6
SP  - 13
EP  - 13
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12126
ER  - 

@misc{
author = "Grahovac, Nebojša and Stanković, Srboljub",
year = "2022",
abstract = "Postupak optimizacije rada rashladnih kompresora pomoću simulacije rada elektromotora kompresora i ventila kompresora u sklopu rada agregatiranih jedinica, se sastoji iz tri faze:matematička simulacija rada kompresora, uticaj ugrađenog elektromotora kompresora na rad kompresora i uticaj geometrijskih karakteristika ventila na rad kompresora. Novina pronalaska je u primeni druge i treće faze postupka. Iz postupka proističe da je neophodno ventile konstruktivno prilagođavati odgovarajućim elektromotorima tj. režimima rada rashladnih agregata., The method for optimizing the operation of refrigeration compressors by simulating the operation of electric compressor motor and compressor valves within the operation of aggregate units, consists of three phases: mathematical simulation of compressor operation, the influence of the built-in electric motor of the compressor on the operation of the compressor and the influence of the geometric characteristics of the valve on the operation of the compressor. The novelty of the invention is implementation of the second and third phases of the method. It is necessary to constructively adopt the valves to correspond to the electric motor, ie. operating modes of refrigeration units.",
journal = "Zavod za intelektualnu svojinu Republike Srbije",
title = "Postupak optimizacije rashladnog kompresora pomoću simulacije rada elektromotora kompresora i ventila kompresora u sklopu rada agregatnih jedinica, The method for optimizing refrigeration compressor by simulating the operation of compressor electric motor and compressor valves as part of the aggregate units operation",
number = "6",
pages = "13-13",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12126"
}

Grahovac, N.,& Stanković, S.. (2022). Postupak optimizacije rashladnog kompresora pomoću simulacije rada elektromotora kompresora i ventila kompresora u sklopu rada agregatnih jedinica. in Zavod za intelektualnu svojinu Republike Srbije(6), 13-13.
https://hdl.handle.net/21.15107/rcub_vinar_12126

Grahovac N, Stanković S. Postupak optimizacije rashladnog kompresora pomoću simulacije rada elektromotora kompresora i ventila kompresora u sklopu rada agregatnih jedinica. in Zavod za intelektualnu svojinu Republike Srbije. 2022;(6):13-13.
https://hdl.handle.net/21.15107/rcub_vinar_12126 .

Grahovac, Nebojša, Stanković, Srboljub, "Postupak optimizacije rashladnog kompresora pomoću simulacije rada elektromotora kompresora i ventila kompresora u sklopu rada agregatnih jedinica" in Zavod za intelektualnu svojinu Republike Srbije, no. 6 (2022):13-13,
https://hdl.handle.net/21.15107/rcub_vinar_12126 .

TY  - PAT
AU  - Grahovac, Nebojša
AU  - Stanković, Srboljub
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12125
AB  - Postupak regulacije relativne vlažnosti u rashladnoj komori rashladnog uređaja uvodi higrostat (4) i ventilator (5) u rashladnu komoru rashladnog uređaja, da bi se suvišna vlaga od svežih namirnica i kaliranja rashlađenih proizvoda odstranila iz komore. Kada se napuni komora rashladnog uređaja, u komori poraste i temperatura i relativna vlažnost. Higrostatom (4) se kontroliše relativna vlažnost i podesi na željenu vrednost. Kada se relativna vlažnost poveća higrostat (4) šalje impuls ventilatoru (5) koji povećanjem brzine strujanja smanjuje temperaturu u komori i vraća relativnu vlažnost na željenu vrednost.
AB  - The method of regulating the relative humidity in the refrigeration chamber of the refrigeration unit introduces a hygrostat (4) and a fan (5) into the refrigeration chamber of the refrigeration unit, in order to remove excess moisture from fresh food and refrigerated products shrinkage. When the cooling chamber is filled, the temperature and relative humidity in the chamber increase. The relative humidity is controlled by the hygrostat (4) and set to the desired value. When the relative humidity increases, the hygrostat (4) sends an impulse to the fan (5), which reduces the temperature in the chamber by increasing the flow rate and returns the relative humidity to the desired value.
T2  - Zavod za intelektualnu svojinu Republike Srbije
T1  - Postupak regulacije relativne vlažnosti u rashladnoj komori rashladnog uređaja
T1  - Relative humidity regulation procedure in the cooling device coolong chamber
IS  - 1
SP  - 9
EP  - 10
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12125
ER  - 

@misc{
author = "Grahovac, Nebojša and Stanković, Srboljub",
year = "2022",
abstract = "Postupak regulacije relativne vlažnosti u rashladnoj komori rashladnog uređaja uvodi higrostat (4) i ventilator (5) u rashladnu komoru rashladnog uređaja, da bi se suvišna vlaga od svežih namirnica i kaliranja rashlađenih proizvoda odstranila iz komore. Kada se napuni komora rashladnog uređaja, u komori poraste i temperatura i relativna vlažnost. Higrostatom (4) se kontroliše relativna vlažnost i podesi na željenu vrednost. Kada se relativna vlažnost poveća higrostat (4) šalje impuls ventilatoru (5) koji povećanjem brzine strujanja smanjuje temperaturu u komori i vraća relativnu vlažnost na željenu vrednost., The method of regulating the relative humidity in the refrigeration chamber of the refrigeration unit introduces a hygrostat (4) and a fan (5) into the refrigeration chamber of the refrigeration unit, in order to remove excess moisture from fresh food and refrigerated products shrinkage. When the cooling chamber is filled, the temperature and relative humidity in the chamber increase. The relative humidity is controlled by the hygrostat (4) and set to the desired value. When the relative humidity increases, the hygrostat (4) sends an impulse to the fan (5), which reduces the temperature in the chamber by increasing the flow rate and returns the relative humidity to the desired value.",
journal = "Zavod za intelektualnu svojinu Republike Srbije",
title = "Postupak regulacije relativne vlažnosti u rashladnoj komori rashladnog uređaja, Relative humidity regulation procedure in the cooling device coolong chamber",
number = "1",
pages = "9-10",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12125"
}

Grahovac, N.,& Stanković, S.. (2022). Postupak regulacije relativne vlažnosti u rashladnoj komori rashladnog uređaja. in Zavod za intelektualnu svojinu Republike Srbije(1), 9-10.
https://hdl.handle.net/21.15107/rcub_vinar_12125

Grahovac N, Stanković S. Postupak regulacije relativne vlažnosti u rashladnoj komori rashladnog uređaja. in Zavod za intelektualnu svojinu Republike Srbije. 2022;(1):9-10.
https://hdl.handle.net/21.15107/rcub_vinar_12125 .

Grahovac, Nebojša, Stanković, Srboljub, "Postupak regulacije relativne vlažnosti u rashladnoj komori rashladnog uređaja" in Zavod za intelektualnu svojinu Republike Srbije, no. 1 (2022):9-10,
https://hdl.handle.net/21.15107/rcub_vinar_12125 .

TY  - JOUR
AU  - Vidojković, Sonja M.
AU  - Onjia, Antonije E.
AU  - Devečerski, Aleksandar
AU  - Grahovac, Nebojša N.
AU  - Nastasović, Aleksandra B.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/294
AB  - The main causes of efficiency loss in thermal power plants are boiler tube failures that diminish unit reliability and availability, and raise the cost of the electric energy. For that reason, the regular examination of boiler tubes is indispensable measure for prevention of future malfunctions of power units. The microscopic examination of economizers inner wall microstructure, the analysis of chemical composition of deposit using X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) have been performed in a subcritical power plant. Stress corrosion cracking, pitting corrosion, destroyed protective magnetite layer, presence of magnetite and hematite in deposit and corrosive impurities within the cracks have indicated the effect of inadequate quality of feedwater that cannot entirely ensure reliable operation of the boiler. It may be stated that maintenance of present boiler does not provide its reliable operation. The extensive chemical control of water/steam cycle was recommended.
T2  - Hemijska industrija
T1  - Economizer water-wall damages initiated by feedwater impurities
VL  - 68
IS  - 5
SP  - 559
EP  - 563
DO  - 10.2298/HEMIND130715082V
ER  - 

@article{
author = "Vidojković, Sonja M. and Onjia, Antonije E. and Devečerski, Aleksandar and Grahovac, Nebojša N. and Nastasović, Aleksandra B.",
year = "2014",
abstract = "The main causes of efficiency loss in thermal power plants are boiler tube failures that diminish unit reliability and availability, and raise the cost of the electric energy. For that reason, the regular examination of boiler tubes is indispensable measure for prevention of future malfunctions of power units. The microscopic examination of economizers inner wall microstructure, the analysis of chemical composition of deposit using X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) have been performed in a subcritical power plant. Stress corrosion cracking, pitting corrosion, destroyed protective magnetite layer, presence of magnetite and hematite in deposit and corrosive impurities within the cracks have indicated the effect of inadequate quality of feedwater that cannot entirely ensure reliable operation of the boiler. It may be stated that maintenance of present boiler does not provide its reliable operation. The extensive chemical control of water/steam cycle was recommended.",
journal = "Hemijska industrija",
title = "Economizer water-wall damages initiated by feedwater impurities",
volume = "68",
number = "5",
pages = "559-563",
doi = "10.2298/HEMIND130715082V"
}

Vidojković, S. M., Onjia, A. E., Devečerski, A., Grahovac, N. N.,& Nastasović, A. B.. (2014). Economizer water-wall damages initiated by feedwater impurities. in Hemijska industrija, 68(5), 559-563.
https://doi.org/10.2298/HEMIND130715082V

Vidojković SM, Onjia AE, Devečerski A, Grahovac NN, Nastasović AB. Economizer water-wall damages initiated by feedwater impurities. in Hemijska industrija. 2014;68(5):559-563.
doi:10.2298/HEMIND130715082V .

Vidojković, Sonja M., Onjia, Antonije E., Devečerski, Aleksandar, Grahovac, Nebojša N., Nastasović, Aleksandra B., "Economizer water-wall damages initiated by feedwater impurities" in Hemijska industrija, 68, no. 5 (2014):559-563,
https://doi.org/10.2298/HEMIND130715082V . .

TY  - JOUR
AU  - Grahovac, Nebojša N.
AU  - Stanković, Srboljub
AU  - Zec, Slavica
AU  - Maksimović, Vesna
AU  - Grahovac, Boris
AU  - Milovanović, Dubravka S.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2743
AB  - Results of the wear resistance of the diamond-coated cutting tool inserts upon machining Al-12% Si alloy and glass fiber/polyester resin composites are presented in this paper. The aim of this paper was to demonstrate the advantages of application of cutting tool inserts with the diamond coating over the conventional tungsten-carbide (WC) tools, and to obtain the cheaper serial production (shorter machining time) and satisfactory lifetime of the diamond cutting tool inserts. Surface roughness of the machined samples was measured for both as-received and diamond coated inserts. The diamond microstructure of undamaged part of inserts as well as the appearance of microstructure of diamond coated inserts after machining has been investigated. Results of the behavior of two regimes of preparation of diamond-coated inserts were compared and analyzed. Generally, the wear resistance of the diamond-coated cutting tool is superior over the conventional tool.
T2  - Processing and Application of Ceramics
T1  - Wear of diamond-coated cutting tool inserts upon machining of Al-12% Si and glass fiber/polyester resin composites
VL  - 7
IS  - 2
SP  - 69
EP  - 72
DO  - 10.2298/PAC1302069G
ER  - 

@article{
author = "Grahovac, Nebojša N. and Stanković, Srboljub and Zec, Slavica and Maksimović, Vesna and Grahovac, Boris and Milovanović, Dubravka S.",
year = "2013",
abstract = "Results of the wear resistance of the diamond-coated cutting tool inserts upon machining Al-12% Si alloy and glass fiber/polyester resin composites are presented in this paper. The aim of this paper was to demonstrate the advantages of application of cutting tool inserts with the diamond coating over the conventional tungsten-carbide (WC) tools, and to obtain the cheaper serial production (shorter machining time) and satisfactory lifetime of the diamond cutting tool inserts. Surface roughness of the machined samples was measured for both as-received and diamond coated inserts. The diamond microstructure of undamaged part of inserts as well as the appearance of microstructure of diamond coated inserts after machining has been investigated. Results of the behavior of two regimes of preparation of diamond-coated inserts were compared and analyzed. Generally, the wear resistance of the diamond-coated cutting tool is superior over the conventional tool.",
journal = "Processing and Application of Ceramics",
title = "Wear of diamond-coated cutting tool inserts upon machining of Al-12% Si and glass fiber/polyester resin composites",
volume = "7",
number = "2",
pages = "69-72",
doi = "10.2298/PAC1302069G"
}

Grahovac, N. N., Stanković, S., Zec, S., Maksimović, V., Grahovac, B.,& Milovanović, D. S.. (2013). Wear of diamond-coated cutting tool inserts upon machining of Al-12% Si and glass fiber/polyester resin composites. in Processing and Application of Ceramics, 7(2), 69-72.
https://doi.org/10.2298/PAC1302069G

Grahovac NN, Stanković S, Zec S, Maksimović V, Grahovac B, Milovanović DS. Wear of diamond-coated cutting tool inserts upon machining of Al-12% Si and glass fiber/polyester resin composites. in Processing and Application of Ceramics. 2013;7(2):69-72.
doi:10.2298/PAC1302069G .

Grahovac, Nebojša N., Stanković, Srboljub, Zec, Slavica, Maksimović, Vesna, Grahovac, Boris, Milovanović, Dubravka S., "Wear of diamond-coated cutting tool inserts upon machining of Al-12% Si and glass fiber/polyester resin composites" in Processing and Application of Ceramics, 7, no. 2 (2013):69-72,
https://doi.org/10.2298/PAC1302069G . .

TY  - JOUR
AU  - Vidojković, Sonja
AU  - Onjia, Antonije E.
AU  - Matović, Branko
AU  - Grahovac, Nebojša N.
AU  - Maksimović, Vesna
AU  - Nastasović, Aleksandra B.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5669
AB  - Prevention and minimizing corrosion processes on steam generating equipment is highly important in the thermal power industry. The maintenance of feedwater quality at a level corresponding to the standards of technological designing, followed by timely respond to the fluctuation of measured parameters, has a decisive role in corrosion prevention. In this study, the comprehensive chemical control of feedwater quality in 210 MW Thermal Power Plant (TPP) was carried out in order to evaluate its potentiality to assure reliable function of the boiler and discover possible irregularity that might be responsible for frequent boiler tube failures. Sensitive on-line and off-line analytical instruments were used for measuring key and diagnostic parameters considered to be crucial for boiler safety and performances. Obtained results provided evidences for exceeded levels of oxygen, silica, sodium, chloride, sulfate, copper, and conductivity what distinctly demonstrated necessity of feedwater control improvement. Consequently, more effective feedwater quality monitoring concept was recommended. In this paper, the explanation of presumable root causes of corrosive contaminants was given including basic directions for their maintenance in proscribed limits. (C) 2013 Elsevier Ltd. All rights reserved.
T2  - Applied Thermal Engineering
T1  - Extensive feedwater quality control and monitoring concept for preventing chemistry-related failures of boiler tubes in a subcritical thermal power plant
VL  - 59
IS  - 1-2
SP  - 683
EP  - 694
DO  - 10.1016/j.applthermaleng.2013.06.028
ER  - 

@article{
author = "Vidojković, Sonja and Onjia, Antonije E. and Matović, Branko and Grahovac, Nebojša N. and Maksimović, Vesna and Nastasović, Aleksandra B.",
year = "2013",
abstract = "Prevention and minimizing corrosion processes on steam generating equipment is highly important in the thermal power industry. The maintenance of feedwater quality at a level corresponding to the standards of technological designing, followed by timely respond to the fluctuation of measured parameters, has a decisive role in corrosion prevention. In this study, the comprehensive chemical control of feedwater quality in 210 MW Thermal Power Plant (TPP) was carried out in order to evaluate its potentiality to assure reliable function of the boiler and discover possible irregularity that might be responsible for frequent boiler tube failures. Sensitive on-line and off-line analytical instruments were used for measuring key and diagnostic parameters considered to be crucial for boiler safety and performances. Obtained results provided evidences for exceeded levels of oxygen, silica, sodium, chloride, sulfate, copper, and conductivity what distinctly demonstrated necessity of feedwater control improvement. Consequently, more effective feedwater quality monitoring concept was recommended. In this paper, the explanation of presumable root causes of corrosive contaminants was given including basic directions for their maintenance in proscribed limits. (C) 2013 Elsevier Ltd. All rights reserved.",
journal = "Applied Thermal Engineering",
title = "Extensive feedwater quality control and monitoring concept for preventing chemistry-related failures of boiler tubes in a subcritical thermal power plant",
volume = "59",
number = "1-2",
pages = "683-694",
doi = "10.1016/j.applthermaleng.2013.06.028"
}

Vidojković, S., Onjia, A. E., Matović, B., Grahovac, N. N., Maksimović, V.,& Nastasović, A. B.. (2013). Extensive feedwater quality control and monitoring concept for preventing chemistry-related failures of boiler tubes in a subcritical thermal power plant. in Applied Thermal Engineering, 59(1-2), 683-694.
https://doi.org/10.1016/j.applthermaleng.2013.06.028

Vidojković S, Onjia AE, Matović B, Grahovac NN, Maksimović V, Nastasović AB. Extensive feedwater quality control and monitoring concept for preventing chemistry-related failures of boiler tubes in a subcritical thermal power plant. in Applied Thermal Engineering. 2013;59(1-2):683-694.
doi:10.1016/j.applthermaleng.2013.06.028 .

Vidojković, Sonja, Onjia, Antonije E., Matović, Branko, Grahovac, Nebojša N., Maksimović, Vesna, Nastasović, Aleksandra B., "Extensive feedwater quality control and monitoring concept for preventing chemistry-related failures of boiler tubes in a subcritical thermal power plant" in Applied Thermal Engineering, 59, no. 1-2 (2013):683-694,
https://doi.org/10.1016/j.applthermaleng.2013.06.028 . .

TY  - JOUR
AU  - Jovanović, Milan T.
AU  - Bobić, Ilija
AU  - Djuric, B.
AU  - Grahovac, Nebojša N.
AU  - Ilić, N.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3157
AB  - The effect of heat treatment on microstructure, hardness, tensile properties, fracture mode and wear behaviour during lubricated and dry sliding of the zinc-based alloy with 25 wt.% Al was studied. Microstructural investigation and chemical analysis of as-cast and heat-treated specimens, the fracture and worn surfaces, as well as wear debris were performed by scanning electron microscopy and energy dispersive spectroscopy. Wear tests were carried out using a disc-on block-type wear machine. By a relatively simple heat treating consisting of a short-term annealing in the single-phase region followed by water-quenching, the elongation has been markedly improved, while the strength was maintained high. The results indicate that the wear rate strongly depends on the microstructure, applied load and sliding conditions. The wear rate increases with load, and under dry sliding conditions the wear rate is approximately two orders of a magnitude higher than under lubricated conditions. During dry sliding the best wear behaviour was displayed by the water-quenched specimens, whereas slowly cooled specimens showed the higher wear rate. Lubrication strongly affects the wear behaviour. Contrary to dry sliding, slowly cooled specimens exhibit the best wear properties under lubricated conditions. The wear mechanisms were proposed for dry and lubricated sliding.
T2  - Tribology Letters
T1  - Microstructural and sliding wear behaviour of a heat-treated zinc-based alloy
VL  - 25
IS  - 3
SP  - 173
EP  - 184
DO  - 10.1007/s11249-006-9106-8
ER  - 

@article{
author = "Jovanović, Milan T. and Bobić, Ilija and Djuric, B. and Grahovac, Nebojša N. and Ilić, N.",
year = "2007",
abstract = "The effect of heat treatment on microstructure, hardness, tensile properties, fracture mode and wear behaviour during lubricated and dry sliding of the zinc-based alloy with 25 wt.% Al was studied. Microstructural investigation and chemical analysis of as-cast and heat-treated specimens, the fracture and worn surfaces, as well as wear debris were performed by scanning electron microscopy and energy dispersive spectroscopy. Wear tests were carried out using a disc-on block-type wear machine. By a relatively simple heat treating consisting of a short-term annealing in the single-phase region followed by water-quenching, the elongation has been markedly improved, while the strength was maintained high. The results indicate that the wear rate strongly depends on the microstructure, applied load and sliding conditions. The wear rate increases with load, and under dry sliding conditions the wear rate is approximately two orders of a magnitude higher than under lubricated conditions. During dry sliding the best wear behaviour was displayed by the water-quenched specimens, whereas slowly cooled specimens showed the higher wear rate. Lubrication strongly affects the wear behaviour. Contrary to dry sliding, slowly cooled specimens exhibit the best wear properties under lubricated conditions. The wear mechanisms were proposed for dry and lubricated sliding.",
journal = "Tribology Letters",
title = "Microstructural and sliding wear behaviour of a heat-treated zinc-based alloy",
volume = "25",
number = "3",
pages = "173-184",
doi = "10.1007/s11249-006-9106-8"
}

Jovanović, M. T., Bobić, I., Djuric, B., Grahovac, N. N.,& Ilić, N.. (2007). Microstructural and sliding wear behaviour of a heat-treated zinc-based alloy. in Tribology Letters, 25(3), 173-184.
https://doi.org/10.1007/s11249-006-9106-8

Jovanović MT, Bobić I, Djuric B, Grahovac NN, Ilić N. Microstructural and sliding wear behaviour of a heat-treated zinc-based alloy. in Tribology Letters. 2007;25(3):173-184.
doi:10.1007/s11249-006-9106-8 .

Jovanović, Milan T., Bobić, Ilija, Djuric, B., Grahovac, Nebojša N., Ilić, N., "Microstructural and sliding wear behaviour of a heat-treated zinc-based alloy" in Tribology Letters, 25, no. 3 (2007):173-184,
https://doi.org/10.1007/s11249-006-9106-8 . .

TY  - JOUR
AU  - Vilotijević, Miroljub N.
AU  - Grahovac, Nebojša N.
AU  - Milovanović, Ljiljana M.
AU  - Marinković, Slobodan N.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2997
AB  - Diamond coatings were deposited onto Mo and WC-Co Substrates using a low pressure premixed acetylene-oxygen flat flame by means of a special apparatus operating at 50 mbar. Uniform diamond coatings containing significant amounts of non-diamond carbon were deposited over areas of approximate to 7 cm(2) onto Mo substrates, the coating thickness after 1 h deposition amounted to approximate to 1 mu m. Upon machining an Al-12 % Si alloy under identical conditions, the diamond coated WC-Co cutting tool inserts showed 30 % less wear than the as-receivcd inserts.
T2  - Journal of the Serbian Chemical Society
T1  - Chemical vapour deposition of diamond using low pressure flat combustion flame
VL  - 71
IS  - 2
SP  - 197
EP  - 202
DO  - 10.2298/JSC0602197V
ER  - 

@article{
author = "Vilotijević, Miroljub N. and Grahovac, Nebojša N. and Milovanović, Ljiljana M. and Marinković, Slobodan N.",
year = "2006",
abstract = "Diamond coatings were deposited onto Mo and WC-Co Substrates using a low pressure premixed acetylene-oxygen flat flame by means of a special apparatus operating at 50 mbar. Uniform diamond coatings containing significant amounts of non-diamond carbon were deposited over areas of approximate to 7 cm(2) onto Mo substrates, the coating thickness after 1 h deposition amounted to approximate to 1 mu m. Upon machining an Al-12 % Si alloy under identical conditions, the diamond coated WC-Co cutting tool inserts showed 30 % less wear than the as-receivcd inserts.",
journal = "Journal of the Serbian Chemical Society",
title = "Chemical vapour deposition of diamond using low pressure flat combustion flame",
volume = "71",
number = "2",
pages = "197-202",
doi = "10.2298/JSC0602197V"
}

Vilotijević, M. N., Grahovac, N. N., Milovanović, L. M.,& Marinković, S. N.. (2006). Chemical vapour deposition of diamond using low pressure flat combustion flame. in Journal of the Serbian Chemical Society, 71(2), 197-202.
https://doi.org/10.2298/JSC0602197V

Vilotijević MN, Grahovac NN, Milovanović LM, Marinković SN. Chemical vapour deposition of diamond using low pressure flat combustion flame. in Journal of the Serbian Chemical Society. 2006;71(2):197-202.
doi:10.2298/JSC0602197V .

Vilotijević, Miroljub N., Grahovac, Nebojša N., Milovanović, Ljiljana M., Marinković, Slobodan N., "Chemical vapour deposition of diamond using low pressure flat combustion flame" in Journal of the Serbian Chemical Society, 71, no. 2 (2006):197-202,
https://doi.org/10.2298/JSC0602197V . .