TY  - CONF
AU  - Chumakov, A. N.
AU  - Nikonchuk, I. S.
AU  - Gaković, Biljana M.
AU  - Petrović, Suzana
AU  - Trtica, Milan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12470
AB  - Features of submicron structures and oxides formation on steel in air and liquids under laser irradiation are investigated experimentally.
PB  - Minsk : National Academy of Sciences of Belarus; B.I. Stepanov Institute of Physics
C3  - XI Belarusian-Serbian Symposium "Physics and Diagnostics of Laboratory and Astrophysical Plasmas" (РDР-11) : Proceedings
T1  - Formation of microstructures and oxides on steel surface by laser irradiation in air and liquids
SP  - 87
EP  - 90
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12470
ER  - 

@conference{
author = "Chumakov, A. N. and Nikonchuk, I. S. and Gaković, Biljana M. and Petrović, Suzana and Trtica, Milan",
year = "2016",
abstract = "Features of submicron structures and oxides formation on steel in air and liquids under laser irradiation are investigated experimentally.",
publisher = "Minsk : National Academy of Sciences of Belarus; B.I. Stepanov Institute of Physics",
journal = "XI Belarusian-Serbian Symposium "Physics and Diagnostics of Laboratory and Astrophysical Plasmas" (РDР-11) : Proceedings",
title = "Formation of microstructures and oxides on steel surface by laser irradiation in air and liquids",
pages = "87-90",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12470"
}

Chumakov, A. N., Nikonchuk, I. S., Gaković, B. M., Petrović, S.,& Trtica, M.. (2016). Formation of microstructures and oxides on steel surface by laser irradiation in air and liquids. in XI Belarusian-Serbian Symposium "Physics and Diagnostics of Laboratory and Astrophysical Plasmas" (РDР-11) : Proceedings
Minsk : National Academy of Sciences of Belarus; B.I. Stepanov Institute of Physics., 87-90.
https://hdl.handle.net/21.15107/rcub_vinar_12470

Chumakov AN, Nikonchuk IS, Gaković BM, Petrović S, Trtica M. Formation of microstructures and oxides on steel surface by laser irradiation in air and liquids. in XI Belarusian-Serbian Symposium "Physics and Diagnostics of Laboratory and Astrophysical Plasmas" (РDР-11) : Proceedings. 2016;:87-90.
https://hdl.handle.net/21.15107/rcub_vinar_12470 .

Chumakov, A. N., Nikonchuk, I. S., Gaković, Biljana M., Petrović, Suzana, Trtica, Milan, "Formation of microstructures and oxides on steel surface by laser irradiation in air and liquids" in XI Belarusian-Serbian Symposium "Physics and Diagnostics of Laboratory and Astrophysical Plasmas" (РDР-11) : Proceedings (2016):87-90,
https://hdl.handle.net/21.15107/rcub_vinar_12470 .

TY  - CONF
AU  - Chumakov, A. N.
AU  - Nikonchuk, I. S.
AU  - Gaković, Biljana M.
AU  - Petrović, Suzana
AU  - Mitrić, Miodrag
AU  - Lupulescu, C.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10957
AB  - Creation of various surface structures on the laser-irradiated materials and formation of metal oxides play an important role to improve the mechanical, physical and chemical properties of materials used in different fields of industry [1-4]. Therefore, the establishment of main mechanisms and optimal regimes of laser micro and nanostructuring of materials and regularities of oxides formation is an important task. In the present study the multipulse laser irradiation (λ = 1064 nm, τ = 1 ns, f = 100÷500 Hz, q = 4.4·109 W/cm2) was used to create micro and nanostructures on the surface of high quality structural carbon steel at different conditions. Steel samples were moving along a computer given trajectory with a velocity of v = 0.2 cm/s. Steel samples were irradiated in ambient air, 3% hydrogen peroxide (H2O2) and ethanol (C2H5OH). Surface structures and composition analysis were examined by methods of optical and scanning electron microscopy. X-ray diffraction (XRD) was used to analyze a phase composition of irradiated steel samples. XRD spectra for various conditions of laser action have had different intensity profiles (peaks value, its position and width). Energydispersive X-ray spectroscopy (EDS) was used for elemental analyses. Surface structures were examined by scanning electron microscope (SEM). The detected surface structures are strongly depends on environment conditions and parameters of laser irradiation. In particular, on the surface of steel samples irradiated in the ambient air, wave structures with a period of 1 μm, irregular structures with a size of ÷22000 nm, grains with the size of 50÷200 nm, pores and irregular threadlike structures were observed. Quasiregular structures with a size of 100÷200 nm and plurality of pores with a size of 40÷600 nm were discovered on the surface of steel samples irradiated in the ethanol. On the surface of the samples irradiated in the environment of hydrogen peroxide numerous cracks and grain structures with the size of 30÷70 nm were observed. The reasons of these differences are discussed.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade
T1  - Microstructures and oxides formation on structural steel by nanosecond laser irradiation
SP  - 188
EP  - 189
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10957
ER  - 

@conference{
author = "Chumakov, A. N. and Nikonchuk, I. S. and Gaković, Biljana M. and Petrović, Suzana and Mitrić, Miodrag and Lupulescu, C.",
year = "2015",
abstract = "Creation of various surface structures on the laser-irradiated materials and formation of metal oxides play an important role to improve the mechanical, physical and chemical properties of materials used in different fields of industry [1-4]. Therefore, the establishment of main mechanisms and optimal regimes of laser micro and nanostructuring of materials and regularities of oxides formation is an important task. In the present study the multipulse laser irradiation (λ = 1064 nm, τ = 1 ns, f = 100÷500 Hz, q = 4.4·109 W/cm2) was used to create micro and nanostructures on the surface of high quality structural carbon steel at different conditions. Steel samples were moving along a computer given trajectory with a velocity of v = 0.2 cm/s. Steel samples were irradiated in ambient air, 3% hydrogen peroxide (H2O2) and ethanol (C2H5OH). Surface structures and composition analysis were examined by methods of optical and scanning electron microscopy. X-ray diffraction (XRD) was used to analyze a phase composition of irradiated steel samples. XRD spectra for various conditions of laser action have had different intensity profiles (peaks value, its position and width). Energydispersive X-ray spectroscopy (EDS) was used for elemental analyses. Surface structures were examined by scanning electron microscope (SEM). The detected surface structures are strongly depends on environment conditions and parameters of laser irradiation. In particular, on the surface of steel samples irradiated in the ambient air, wave structures with a period of 1 μm, irregular structures with a size of ÷22000 nm, grains with the size of 50÷200 nm, pores and irregular threadlike structures were observed. Quasiregular structures with a size of 100÷200 nm and plurality of pores with a size of 40÷600 nm were discovered on the surface of steel samples irradiated in the ethanol. On the surface of the samples irradiated in the environment of hydrogen peroxide numerous cracks and grain structures with the size of 30÷70 nm were observed. The reasons of these differences are discussed.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade",
title = "Microstructures and oxides formation on structural steel by nanosecond laser irradiation",
pages = "188-189",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10957"
}

Chumakov, A. N., Nikonchuk, I. S., Gaković, B. M., Petrović, S., Mitrić, M.,& Lupulescu, C.. (2015). Microstructures and oxides formation on structural steel by nanosecond laser irradiation. in PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 188-189.
https://hdl.handle.net/21.15107/rcub_vinar_10957

Chumakov AN, Nikonchuk IS, Gaković BM, Petrović S, Mitrić M, Lupulescu C. Microstructures and oxides formation on structural steel by nanosecond laser irradiation. in PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade. 2015;:188-189.
https://hdl.handle.net/21.15107/rcub_vinar_10957 .

Chumakov, A. N., Nikonchuk, I. S., Gaković, Biljana M., Petrović, Suzana, Mitrić, Miodrag, Lupulescu, C., "Microstructures and oxides formation on structural steel by nanosecond laser irradiation" in PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade (2015):188-189,
https://hdl.handle.net/21.15107/rcub_vinar_10957 .

TY  - JOUR
AU  - Chumakov, A. N.
AU  - Nikonchuk, I. S.
AU  - Gaković, Biljana M.
AU  - Petrović, Suzana
AU  - Trtica, Milan
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7057
AB  - Results of surface modification are presented for MnNiCrMo-steel samples exposed to a Nd:YAG laser operating in a pulse-periodic mode (10 Hz frequency, 532 nm wavelength and 17 ns pulse duration). The steel samples were irradiated in air by a series of laser pulses at a fluence of 10.7 J cm(-2) close to a plasma formation threshold. Surface structures were examined by optical, scanning electron and confocal optical microscopy. The appearance of the detected surface structures strongly depends on the number of laser pulses and power density of laser radiation. Significant differences were found between laser-induced structures in the center of the laser spot, at its edges and in the nearest surrounding of the laser spot. The reasons for such differences are discussed.
T2  - Physica Scripta
T1  - Multipulse nanosecond laser modification of steel surface
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014016
ER  - 

@article{
author = "Chumakov, A. N. and Nikonchuk, I. S. and Gaković, Biljana M. and Petrović, Suzana and Trtica, Milan",
year = "2014",
abstract = "Results of surface modification are presented for MnNiCrMo-steel samples exposed to a Nd:YAG laser operating in a pulse-periodic mode (10 Hz frequency, 532 nm wavelength and 17 ns pulse duration). The steel samples were irradiated in air by a series of laser pulses at a fluence of 10.7 J cm(-2) close to a plasma formation threshold. Surface structures were examined by optical, scanning electron and confocal optical microscopy. The appearance of the detected surface structures strongly depends on the number of laser pulses and power density of laser radiation. Significant differences were found between laser-induced structures in the center of the laser spot, at its edges and in the nearest surrounding of the laser spot. The reasons for such differences are discussed.",
journal = "Physica Scripta",
title = "Multipulse nanosecond laser modification of steel surface",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014016"
}

Chumakov, A. N., Nikonchuk, I. S., Gaković, B. M., Petrović, S.,& Trtica, M.. (2014). Multipulse nanosecond laser modification of steel surface. in Physica Scripta, T162.
https://doi.org/10.1088/0031-8949/2014/T162/014016

Chumakov AN, Nikonchuk IS, Gaković BM, Petrović S, Trtica M. Multipulse nanosecond laser modification of steel surface. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014016 .

Chumakov, A. N., Nikonchuk, I. S., Gaković, Biljana M., Petrović, Suzana, Trtica, Milan, "Multipulse nanosecond laser modification of steel surface" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014016 . .

TY  - JOUR
AU  - Chumakov, A. N.
AU  - Nikonchuk, Irina S.
AU  - Gaković, Biljana M.
AU  - Petrović, Suzana
AU  - Mitrić, Miodrag
AU  - Lupulescu, C.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10958
AB  - Results of laser-induced oxidation (100−500 Hz frequency, 1064 nm wavelength, and 1 ns pulse duration) and formation of micro- and nanostructures on the surface of high-quality structural carbon steel (0.42 wt.% C, 0.5 wt.% Mn, 0.25 wt.% Cr) are presented. The steel samples were irradiated in ambient air, water, 3% hydrogen peroxide, and ethanol by a series of laser pulses at a power density of (3.2−4.4)·109 W/cm2, which is close to the ablation threshold. The surface structures were examined by optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and Raman spectroscopy. Different kinds of structures detected on the steel surface and the efficiency of oxide formation depend strongly on both the liquid or gaseous environments and the parameters of laser treatment. It was found that the efficiency of nano/microstructures and oxides formation on structural steel is especially expressed for samples irradiated in air and hydrogen peroxide environments.
T2  - High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
T1  - Formation of microstructures and oxides on structural steel by nanosecond laser irradiation
VL  - 18
IS  - 3
DO  - 10.1615/hightempmatproc.2015015600
ER  - 

@article{
author = "Chumakov, A. N. and Nikonchuk, Irina S. and Gaković, Biljana M. and Petrović, Suzana and Mitrić, Miodrag and Lupulescu, C.",
year = "2014",
abstract = "Results of laser-induced oxidation (100−500 Hz frequency, 1064 nm wavelength, and 1 ns pulse duration) and formation of micro- and nanostructures on the surface of high-quality structural carbon steel (0.42 wt.% C, 0.5 wt.% Mn, 0.25 wt.% Cr) are presented. The steel samples were irradiated in ambient air, water, 3% hydrogen peroxide, and ethanol by a series of laser pulses at a power density of (3.2−4.4)·109 W/cm2, which is close to the ablation threshold. The surface structures were examined by optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and Raman spectroscopy. Different kinds of structures detected on the steel surface and the efficiency of oxide formation depend strongly on both the liquid or gaseous environments and the parameters of laser treatment. It was found that the efficiency of nano/microstructures and oxides formation on structural steel is especially expressed for samples irradiated in air and hydrogen peroxide environments.",
journal = "High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes",
title = "Formation of microstructures and oxides on structural steel by nanosecond laser irradiation",
volume = "18",
number = "3",
doi = "10.1615/hightempmatproc.2015015600"
}

Chumakov, A. N., Nikonchuk, I. S., Gaković, B. M., Petrović, S., Mitrić, M.,& Lupulescu, C.. (2014). Formation of microstructures and oxides on structural steel by nanosecond laser irradiation. in High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, 18(3).
https://doi.org/10.1615/hightempmatproc.2015015600

Chumakov AN, Nikonchuk IS, Gaković BM, Petrović S, Mitrić M, Lupulescu C. Formation of microstructures and oxides on structural steel by nanosecond laser irradiation. in High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes. 2014;18(3).
doi:10.1615/hightempmatproc.2015015600 .

Chumakov, A. N., Nikonchuk, Irina S., Gaković, Biljana M., Petrović, Suzana, Mitrić, Miodrag, Lupulescu, C., "Formation of microstructures and oxides on structural steel by nanosecond laser irradiation" in High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, 18, no. 3 (2014),
https://doi.org/10.1615/hightempmatproc.2015015600 . .