TY  - JOUR
AU  - Trtica, Milan S
AU  - Limpouch, J.
AU  - Gavrilov, P.
AU  - Hribek, P.
AU  - Stasic, J.
AU  - Branković, Goran
AU  - Chen, X.
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1051
AB  - A study of ASP 30 steel surface modification with high intensity Ti:sapphire laser, operating at 804 nm wavelength and pulse duration of 60 fs, in vacuum ambient, is presented. ASP 30 steel surface variations were studied at laser intensities of 10(14) and 10(13) W/cm(2). The steel target specific surface changes and phenomena observed are: (i) Creation of craters at 10(14) W/cm(2) intensity; (ii) formation of periodic surface structures only at the reduced intensity of 10(13) W/cm(2); (iii) chemical surface changes registered only at higher laser intensity, and (iv) occurrence of plasma in front of the surface, including its emission in X-ray region. It can be concluded from this study that the reported laser intensities can effectively be applied for ASP 30 steel surface modification. Careful choosing of laser intensity and pulse count can lead to precise superficial material removal, for example laser intensity similar to 10(13) W/cm(2) and low pulse count can lead to ultra-precise surface processing. Generally, femtosecond laser surface modification of ASP 30 steel is non-contact and very rapid compared with traditional modification methods.
PB  - Cambridge Univ Press, New York
T2  - Laser and Particle Beams
T1  - Surface modification of ASP 30 steel induced by femtosecond laser with 10(14) and 10(13) W/cm(2) intensity in vacuum
EP  - 542
IS  - 3
SP  - 534
VL  - 35
DO  - 10.1017/S0263034617000337
ER  - 

@article{
author = "Trtica, Milan S and Limpouch, J. and Gavrilov, P. and Hribek, P. and Stasic, J. and Branković, Goran and Chen, X.",
year = "2017",
abstract = "A study of ASP 30 steel surface modification with high intensity Ti:sapphire laser, operating at 804 nm wavelength and pulse duration of 60 fs, in vacuum ambient, is presented. ASP 30 steel surface variations were studied at laser intensities of 10(14) and 10(13) W/cm(2). The steel target specific surface changes and phenomena observed are: (i) Creation of craters at 10(14) W/cm(2) intensity; (ii) formation of periodic surface structures only at the reduced intensity of 10(13) W/cm(2); (iii) chemical surface changes registered only at higher laser intensity, and (iv) occurrence of plasma in front of the surface, including its emission in X-ray region. It can be concluded from this study that the reported laser intensities can effectively be applied for ASP 30 steel surface modification. Careful choosing of laser intensity and pulse count can lead to precise superficial material removal, for example laser intensity similar to 10(13) W/cm(2) and low pulse count can lead to ultra-precise surface processing. Generally, femtosecond laser surface modification of ASP 30 steel is non-contact and very rapid compared with traditional modification methods.",
publisher = "Cambridge Univ Press, New York",
journal = "Laser and Particle Beams",
title = "Surface modification of ASP 30 steel induced by femtosecond laser with 10(14) and 10(13) W/cm(2) intensity in vacuum",
pages = "542-534",
number = "3",
volume = "35",
doi = "10.1017/S0263034617000337"
}

Trtica, M. S., Limpouch, J., Gavrilov, P., Hribek, P., Stasic, J., Branković, G.,& Chen, X.. (2017). Surface modification of ASP 30 steel induced by femtosecond laser with 10(14) and 10(13) W/cm(2) intensity in vacuum. in Laser and Particle Beams
Cambridge Univ Press, New York., 35(3), 534-542.
https://doi.org/10.1017/S0263034617000337

Trtica MS, Limpouch J, Gavrilov P, Hribek P, Stasic J, Branković G, Chen X. Surface modification of ASP 30 steel induced by femtosecond laser with 10(14) and 10(13) W/cm(2) intensity in vacuum. in Laser and Particle Beams. 2017;35(3):534-542.
doi:10.1017/S0263034617000337 .

Trtica, Milan S, Limpouch, J., Gavrilov, P., Hribek, P., Stasic, J., Branković, Goran, Chen, X., "Surface modification of ASP 30 steel induced by femtosecond laser with 10(14) and 10(13) W/cm(2) intensity in vacuum" in Laser and Particle Beams, 35, no. 3 (2017):534-542,
https://doi.org/10.1017/S0263034617000337 . .

TY  - JOUR
AU  - Trtica, Milan S
AU  - Limpouch, J.
AU  - Gavrilov, P.
AU  - Gemini, L.
AU  - Panjan, Peter
AU  - Stasic, J.
AU  - Milovanović, D.
AU  - Branković, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/877
AB  - A double layer a-CN/TiAlN coating deposited on ASP30 steel substrate was irradiated by femtosecond laser and surface modification effects were observed. Moderate laser intensities used were in the range of 10(14)-10(13) W/cm(2), while the total thickness of double layer coating was 4.8 mu m (a-CN = 0.6 and TiAlN = 4.2 mu m). Laser-induced changes of the surface showed dependence on laser intensity and number of accumulated pulses. Irradiations at the highest intensity resulted in preservation of one or both layers up to 10 pulses, while at lower intensity (10(13) W/cm(2)) a-CN layer is removed after several pulses and TiAlN is preserved up to 50 pulses. Evaluated damage threshold of the target was 0.49 J/cm(2). Lower laser intensity irradiation produced periodic surface structures (LIPSS) over the entire irradiated spot with periodicity of similar to 700 nm, almost in agreement with the laser wavelength used. Irradiations carried out at the highest laser intensity (10(14) W/cm(2)) and laser pulse count of 50 resulted in the creation of crater like damages with depth up to 20 mu m. Craters were conically shaped, implying intensive processes which took place at the surface. Generation of LIPSS as well as craters can be of great interest for contemporary technologies.
PB  - Cambridge Univ Press, New York
T2  - Laser and Particle Beams
T1  - Surface modification of a-CN/TiAlN double layer coating on ASP 30 steel induced by femtosecond laser with 10(13)-10(14) W/cm(2) intensity in vacuum
EP  - 559
IS  - 3
SP  - 551
VL  - 33
DO  - 10.1017/S0263034615000610
ER  - 

@article{
author = "Trtica, Milan S and Limpouch, J. and Gavrilov, P. and Gemini, L. and Panjan, Peter and Stasic, J. and Milovanović, D. and Branković, Goran",
year = "2015",
abstract = "A double layer a-CN/TiAlN coating deposited on ASP30 steel substrate was irradiated by femtosecond laser and surface modification effects were observed. Moderate laser intensities used were in the range of 10(14)-10(13) W/cm(2), while the total thickness of double layer coating was 4.8 mu m (a-CN = 0.6 and TiAlN = 4.2 mu m). Laser-induced changes of the surface showed dependence on laser intensity and number of accumulated pulses. Irradiations at the highest intensity resulted in preservation of one or both layers up to 10 pulses, while at lower intensity (10(13) W/cm(2)) a-CN layer is removed after several pulses and TiAlN is preserved up to 50 pulses. Evaluated damage threshold of the target was 0.49 J/cm(2). Lower laser intensity irradiation produced periodic surface structures (LIPSS) over the entire irradiated spot with periodicity of similar to 700 nm, almost in agreement with the laser wavelength used. Irradiations carried out at the highest laser intensity (10(14) W/cm(2)) and laser pulse count of 50 resulted in the creation of crater like damages with depth up to 20 mu m. Craters were conically shaped, implying intensive processes which took place at the surface. Generation of LIPSS as well as craters can be of great interest for contemporary technologies.",
publisher = "Cambridge Univ Press, New York",
journal = "Laser and Particle Beams",
title = "Surface modification of a-CN/TiAlN double layer coating on ASP 30 steel induced by femtosecond laser with 10(13)-10(14) W/cm(2) intensity in vacuum",
pages = "559-551",
number = "3",
volume = "33",
doi = "10.1017/S0263034615000610"
}

Trtica, M. S., Limpouch, J., Gavrilov, P., Gemini, L., Panjan, P., Stasic, J., Milovanović, D.,& Branković, G.. (2015). Surface modification of a-CN/TiAlN double layer coating on ASP 30 steel induced by femtosecond laser with 10(13)-10(14) W/cm(2) intensity in vacuum. in Laser and Particle Beams
Cambridge Univ Press, New York., 33(3), 551-559.
https://doi.org/10.1017/S0263034615000610

Trtica MS, Limpouch J, Gavrilov P, Gemini L, Panjan P, Stasic J, Milovanović D, Branković G. Surface modification of a-CN/TiAlN double layer coating on ASP 30 steel induced by femtosecond laser with 10(13)-10(14) W/cm(2) intensity in vacuum. in Laser and Particle Beams. 2015;33(3):551-559.
doi:10.1017/S0263034615000610 .

Trtica, Milan S, Limpouch, J., Gavrilov, P., Gemini, L., Panjan, Peter, Stasic, J., Milovanović, D., Branković, Goran, "Surface modification of a-CN/TiAlN double layer coating on ASP 30 steel induced by femtosecond laser with 10(13)-10(14) W/cm(2) intensity in vacuum" in Laser and Particle Beams, 33, no. 3 (2015):551-559,
https://doi.org/10.1017/S0263034615000610 . .

TY  - JOUR
AU  - Petrović, Suzana M
AU  - Perusko, Davor B
AU  - Radovic-Bogdanović, I
AU  - Branković, Goran
AU  - Cekada, M
AU  - Gaković, Biljana M
AU  - Jaksic, M
AU  - Trtica, Milan S
AU  - Milosavljević, Momir S
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/532
AB  - In this work we studied the influence of laser radiation on the composition, structure and morphology of WTi thin films deposited on n-type (100) silicon wafers. The films were deposited by d.c. sputtering from a 70:30 at% W-Ti target, using Ar ions, to a thickness of similar to 190 nm. Irradiation was performed with a pulsed Nd:YAG laser operating at 1064 nm, whereas the pulse duration was 150 ps. Laser fluences of 3.2 and 5.9 J/cm(2) were found to be sufficient for modification of the WTi/silicon target system. The results show: (i) ablation of WTi thin film and a Si substrate in the central zone of spots, (ii) appearance of hydrodynamic features like resolidified material, (iii) partial ablation of the WTi thin film at the periphery and (iv) appearance of thin film cracks at the far periphery. On the non-ablated areas, the laser modification induced changes in composition, such as inter-mixing of components at the WTi/Si interface with formation of silicides in both metals. Surface oxidation was the dominant process in the ablated areas, which is demonstrated by the presence of a SiO2 phase.
PB  - Korean Inst Metals Materials, Seoul
T2  - Metals and Materials International
T1  - Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser
EP  - 463
IS  - 3
SP  - 457
VL  - 18
DO  - 10.1007/s12540-012-3012-4
ER  - 

@article{
author = "Petrović, Suzana M and Perusko, Davor B and Radovic-Bogdanović, I and Branković, Goran and Cekada, M and Gaković, Biljana M and Jaksic, M and Trtica, Milan S and Milosavljević, Momir S",
year = "2012",
abstract = "In this work we studied the influence of laser radiation on the composition, structure and morphology of WTi thin films deposited on n-type (100) silicon wafers. The films were deposited by d.c. sputtering from a 70:30 at% W-Ti target, using Ar ions, to a thickness of similar to 190 nm. Irradiation was performed with a pulsed Nd:YAG laser operating at 1064 nm, whereas the pulse duration was 150 ps. Laser fluences of 3.2 and 5.9 J/cm(2) were found to be sufficient for modification of the WTi/silicon target system. The results show: (i) ablation of WTi thin film and a Si substrate in the central zone of spots, (ii) appearance of hydrodynamic features like resolidified material, (iii) partial ablation of the WTi thin film at the periphery and (iv) appearance of thin film cracks at the far periphery. On the non-ablated areas, the laser modification induced changes in composition, such as inter-mixing of components at the WTi/Si interface with formation of silicides in both metals. Surface oxidation was the dominant process in the ablated areas, which is demonstrated by the presence of a SiO2 phase.",
publisher = "Korean Inst Metals Materials, Seoul",
journal = "Metals and Materials International",
title = "Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser",
pages = "463-457",
number = "3",
volume = "18",
doi = "10.1007/s12540-012-3012-4"
}

Petrović, S. M., Perusko, D. B., Radovic-Bogdanović, I., Branković, G., Cekada, M., Gaković, B. M., Jaksic, M., Trtica, M. S.,& Milosavljević, M. S.. (2012). Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser. in Metals and Materials International
Korean Inst Metals Materials, Seoul., 18(3), 457-463.
https://doi.org/10.1007/s12540-012-3012-4

Petrović SM, Perusko DB, Radovic-Bogdanović I, Branković G, Cekada M, Gaković BM, Jaksic M, Trtica MS, Milosavljević MS. Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser. in Metals and Materials International. 2012;18(3):457-463.
doi:10.1007/s12540-012-3012-4 .

Petrović, Suzana M, Perusko, Davor B, Radovic-Bogdanović, I, Branković, Goran, Cekada, M, Gaković, Biljana M, Jaksic, M, Trtica, Milan S, Milosavljević, Momir S, "Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser" in Metals and Materials International, 18, no. 3 (2012):457-463,
https://doi.org/10.1007/s12540-012-3012-4 . .

TY  - JOUR
AU  - Stasic, J.
AU  - Trtica, Milan S
AU  - Gaković, B.
AU  - Batani, D.
AU  - Desai, T.
AU  - Branković, Goran
PY  - 2009
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/329
AB  - Interaction of Nd:YAG laser, operating at 266 nm wavelength and a pulse duration of 40 ps, with AISI 1045 steel was studied. Surface damage threshold was estimated to be 0.14 J/cm(2). The steel surface modi. cation was studied at the laser fluence of similar to 1.0 J/cm(2). The energy absorbed from Nd: YAG laser beam is partially converted to thermal energy, which generates a series of effects, such as melting, vaporization of the molten material, shock waves, etc. The following AISI 1045 steel surface morphological changes and processes were observed: (i) intensive damage of the target in the central zone of irradiated area; (ii) appearance of periodic surface structures at nano-level, with periodicity in agreement with the used wavelength; (iii) reduction of oxygen concentration in irradiated area; and (iv) development of plasma in front of the target. Generally, interaction of laser beam with AISI 1045 steel (at 266 nm) results in a near-instantaneous creation of damage, meaning that large steel surfaces can be modified in short times.
PB  - Elsevier, Amsterdam
T2  - Applied Surface Science
T1  - Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses
EP  - 8225
IS  - 19
SP  - 8221
VL  - 255
DO  - 10.1016/j.apsusc.2009.05.049
ER  - 

@article{
author = "Stasic, J. and Trtica, Milan S and Gaković, B. and Batani, D. and Desai, T. and Branković, Goran",
year = "2009",
abstract = "Interaction of Nd:YAG laser, operating at 266 nm wavelength and a pulse duration of 40 ps, with AISI 1045 steel was studied. Surface damage threshold was estimated to be 0.14 J/cm(2). The steel surface modi. cation was studied at the laser fluence of similar to 1.0 J/cm(2). The energy absorbed from Nd: YAG laser beam is partially converted to thermal energy, which generates a series of effects, such as melting, vaporization of the molten material, shock waves, etc. The following AISI 1045 steel surface morphological changes and processes were observed: (i) intensive damage of the target in the central zone of irradiated area; (ii) appearance of periodic surface structures at nano-level, with periodicity in agreement with the used wavelength; (iii) reduction of oxygen concentration in irradiated area; and (iv) development of plasma in front of the target. Generally, interaction of laser beam with AISI 1045 steel (at 266 nm) results in a near-instantaneous creation of damage, meaning that large steel surfaces can be modified in short times.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Surface Science",
title = "Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses",
pages = "8225-8221",
number = "19",
volume = "255",
doi = "10.1016/j.apsusc.2009.05.049"
}

Stasic, J., Trtica, M. S., Gaković, B., Batani, D., Desai, T.,& Branković, G.. (2009). Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses. in Applied Surface Science
Elsevier, Amsterdam., 255(19), 8221-8225.
https://doi.org/10.1016/j.apsusc.2009.05.049

Stasic J, Trtica MS, Gaković B, Batani D, Desai T, Branković G. Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses. in Applied Surface Science. 2009;255(19):8221-8225.
doi:10.1016/j.apsusc.2009.05.049 .

Stasic, J., Trtica, Milan S, Gaković, B., Batani, D., Desai, T., Branković, Goran, "Modifications of AISI 1045 steel by picosecond Nd:YAG laser at 266 nm; comparison with 532 and 1064 nm pulses" in Applied Surface Science, 255, no. 19 (2009):8221-8225,
https://doi.org/10.1016/j.apsusc.2009.05.049 . .