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Plasma
Analysis of thermal physical processes and peculiarities of modification of a steel surface by pulsed plasma flows
A. M. Zhukeshov, A. T. Gabdullina, A. V. Amrenova, G. A. Abdraimova, M. M. Mukhamedryskyzy National Nanotechnology Laboratory of open type, al-Farabi KazNU
Abstract:
The temperature gradient and melting depth of the surface of iron-based alloys under the action of high-temperature pulsed plasma beams have been estimated and compared with the experimental data. It has been shown that the steel surface melts under the action of a pulsed plasma flow at an energy density of 15–20 J/cm$^2$; the heat front propagates to a depth of up to 20 $\mu$m, the thickness of the molten layer being less than 10 $\mu$m. The characteristic size of the microstructure formed as a result of thermal perturbation is estimated at 17 nm. The formation of new phases with crystallite sizes that vary in the range of 16–270 nm is demonstrated experimentally. It has been shown that the formation of nanosize crystalline structure and modified near-surface region are the main factors responsible for strengthening steels.
Received: 04.04.2017
Citation:
A. M. Zhukeshov, A. T. Gabdullina, A. V. Amrenova, G. A. Abdraimova, M. M. Mukhamedryskyzy, “Analysis of thermal physical processes and peculiarities of modification of a steel surface by pulsed plasma flows”, Zhurnal Tekhnicheskoi Fiziki, 87:12 (2017), 1819–1823; Tech. Phys., 62:12 (2017), 1817–1821
Linking options:
https://www.mathnet.ru/eng/jtf6046 https://www.mathnet.ru/eng/jtf/v87/i12/p1819
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Abstract page: | 36 | Full-text PDF : | 18 |
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