TY  - JOUR
AU  - Laketić, Slađana
AU  - Rakin, Marko
AU  - Momčilović, Miloš
AU  - Ciganović, Jovan
AU  - Veljović, Đorđe N.
AU  - Cvijović-Alagić, Ivana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9735
AB  - The effects of picosecond Nd:YAG laser irradiation on chemical and morphological surface characteristics of the commercially pure titanium and Ti-13Nb-13Zr alloy in air and argon atmospheres were studied under different laser output energy values. During the interaction of laser irradiation with the investigated materials, a part of the energy was absorbed on the target surface, influencing surface modifications. Laser beam interaction with the target surface resulted in various morphological alterations, resulting in crater formation and the presence of microcracks and hydrodynamic structures. Moreover, different chemical changes were induced on the target materials' surfaces, resulting in the titanium oxide formation in the irradiation-affected area and consequently increasing the irradiation energy absorption. Given the high energy absorption at the site of interaction, the dimensions of the surface damaged area increased. Consequently, surface roughness increased. The appearance of surface oxides also led to the increased material hardness in the surface-modified area. Observed chemical and morphological changes were pronounced after laser irradiation of the Ti-13Nb-13Zr alloy surface.
PB  - Springer, New York
T2  - International Journal of Minerals Metallurgy and Materials
T1  - Surface modifications of biometallic commercially pure Ti and Ti-13Nb-13Zr alloy by picosecond Nd:YAG laser
DO  - 10.1007/s12613-020-2061-9
ER  - 

@article{
author = "Laketić, Slađana and Rakin, Marko and Momčilović, Miloš and Ciganović, Jovan and Veljović, Đorđe N. and Cvijović-Alagić, Ivana",
year = "2021",
abstract = "The effects of picosecond Nd:YAG laser irradiation on chemical and morphological surface characteristics of the commercially pure titanium and Ti-13Nb-13Zr alloy in air and argon atmospheres were studied under different laser output energy values. During the interaction of laser irradiation with the investigated materials, a part of the energy was absorbed on the target surface, influencing surface modifications. Laser beam interaction with the target surface resulted in various morphological alterations, resulting in crater formation and the presence of microcracks and hydrodynamic structures. Moreover, different chemical changes were induced on the target materials' surfaces, resulting in the titanium oxide formation in the irradiation-affected area and consequently increasing the irradiation energy absorption. Given the high energy absorption at the site of interaction, the dimensions of the surface damaged area increased. Consequently, surface roughness increased. The appearance of surface oxides also led to the increased material hardness in the surface-modified area. Observed chemical and morphological changes were pronounced after laser irradiation of the Ti-13Nb-13Zr alloy surface.",
publisher = "Springer, New York",
journal = "International Journal of Minerals Metallurgy and Materials",
title = "Surface modifications of biometallic commercially pure Ti and Ti-13Nb-13Zr alloy by picosecond Nd:YAG laser",
doi = "10.1007/s12613-020-2061-9"
}

Laketić, S., Rakin, M., Momčilović, M., Ciganović, J., Veljović, Đ. N.,& Cvijović-Alagić, I.. (2021). Surface modifications of biometallic commercially pure Ti and Ti-13Nb-13Zr alloy by picosecond Nd:YAG laser. in International Journal of Minerals Metallurgy and Materials
Springer, New York..
https://doi.org/10.1007/s12613-020-2061-9

Laketić S, Rakin M, Momčilović M, Ciganović J, Veljović ĐN, Cvijović-Alagić I. Surface modifications of biometallic commercially pure Ti and Ti-13Nb-13Zr alloy by picosecond Nd:YAG laser. in International Journal of Minerals Metallurgy and Materials. 2021;.
doi:10.1007/s12613-020-2061-9 .

Laketić, Slađana, Rakin, Marko, Momčilović, Miloš, Ciganović, Jovan, Veljović, Đorđe N., Cvijović-Alagić, Ivana, "Surface modifications of biometallic commercially pure Ti and Ti-13Nb-13Zr alloy by picosecond Nd:YAG laser" in International Journal of Minerals Metallurgy and Materials (2021),
https://doi.org/10.1007/s12613-020-2061-9 . .

TY  - JOUR
AU  - Laketić, Slađana
AU  - Rakin, Marko
AU  - Momčilović, Miloš
AU  - Ciganović, Jovan
AU  - Veljović, Đorđe N.
AU  - Cvijović-Alagić, Ivana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9747
AB  - In the present study surface alterations of the high pressure torsion (HPT)-deformed Ti[sbnd]45Nb (mass%) alloy induced by laser irradiation treatment are presented. The alloy was irradiated in air, argon, and nitrogen atmosphere using the Nd:YAG laser. Laser-induced surface modifications were analyzed by field-emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS), profilometric analysis, and Vickers microhardness measurements. Alloy irradiation under a low laser output energy and a low number of accumulated pulses resulted in the formation of shallow surface craters. An increase of these irradiation parameters caused the appearance of more pronounced surface craters with microcracks and hydrodynamic effects in the form of wave-like structures, ripples, and solidified droplets and consequently caused an increase in the surface roughness. The highest value of the surface roughness of 3.062 μm was attained during the alloy irradiation in argon atmosphere under 15 mJ with 150 accumulated pulses. Interaction of the laser beam with the alloy surface was accompanied by plasma formation and surface ablation due to the irradiation energy absorption. The maximal ablated target material volumes of 5.5 × 1014 nm3 and 2.6 × 1014 nm3 were observed after the irradiation under 15 mJ with 150 accumulated pulses in argon and air atmosphere, respectively. Moreover, attainment of high temperatures at the alloy surface induced its chemical composition alterations. Formation of mixed Ti- and Nb-oxide surface film and absence of nitride particles at the alloy surface was detected irrespective of the irradiation atmosphere. Irradiation in air resulted in the appearance of the most pronounced surface oxide layer with the highest microhardness value which can in great merit influence an increase of the alloy bio-integration abilities and its tribo-corrosion resistance. © 2021 Elsevier B.V.
T2  - Surface and Coatings Technology
T1  - Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics
VL  - 418
SP  - 127255
DO  - 10.1016/j.surfcoat.2021.127255
ER  - 

@article{
author = "Laketić, Slađana and Rakin, Marko and Momčilović, Miloš and Ciganović, Jovan and Veljović, Đorđe N. and Cvijović-Alagić, Ivana",
year = "2021",
abstract = "In the present study surface alterations of the high pressure torsion (HPT)-deformed Ti[sbnd]45Nb (mass%) alloy induced by laser irradiation treatment are presented. The alloy was irradiated in air, argon, and nitrogen atmosphere using the Nd:YAG laser. Laser-induced surface modifications were analyzed by field-emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS), profilometric analysis, and Vickers microhardness measurements. Alloy irradiation under a low laser output energy and a low number of accumulated pulses resulted in the formation of shallow surface craters. An increase of these irradiation parameters caused the appearance of more pronounced surface craters with microcracks and hydrodynamic effects in the form of wave-like structures, ripples, and solidified droplets and consequently caused an increase in the surface roughness. The highest value of the surface roughness of 3.062 μm was attained during the alloy irradiation in argon atmosphere under 15 mJ with 150 accumulated pulses. Interaction of the laser beam with the alloy surface was accompanied by plasma formation and surface ablation due to the irradiation energy absorption. The maximal ablated target material volumes of 5.5 × 1014 nm3 and 2.6 × 1014 nm3 were observed after the irradiation under 15 mJ with 150 accumulated pulses in argon and air atmosphere, respectively. Moreover, attainment of high temperatures at the alloy surface induced its chemical composition alterations. Formation of mixed Ti- and Nb-oxide surface film and absence of nitride particles at the alloy surface was detected irrespective of the irradiation atmosphere. Irradiation in air resulted in the appearance of the most pronounced surface oxide layer with the highest microhardness value which can in great merit influence an increase of the alloy bio-integration abilities and its tribo-corrosion resistance. © 2021 Elsevier B.V.",
journal = "Surface and Coatings Technology",
title = "Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics",
volume = "418",
pages = "127255",
doi = "10.1016/j.surfcoat.2021.127255"
}

Laketić, S., Rakin, M., Momčilović, M., Ciganović, J., Veljović, Đ. N.,& Cvijović-Alagić, I.. (2021). Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics. in Surface and Coatings Technology, 418, 127255.
https://doi.org/10.1016/j.surfcoat.2021.127255

Laketić S, Rakin M, Momčilović M, Ciganović J, Veljović ĐN, Cvijović-Alagić I. Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics. in Surface and Coatings Technology. 2021;418:127255.
doi:10.1016/j.surfcoat.2021.127255 .

Laketić, Slađana, Rakin, Marko, Momčilović, Miloš, Ciganović, Jovan, Veljović, Đorđe N., Cvijović-Alagić, Ivana, "Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics" in Surface and Coatings Technology, 418 (2021):127255,
https://doi.org/10.1016/j.surfcoat.2021.127255 . .