The structure and phase composition of the U9 steel surface layer alloyed with chromium atoms under the action of compression plasma flows

  • Nikolai N. Cherenda Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Alexander A. Malashevich Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Vladimir V. Uglov Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Valentin M. Astashynski A. V. Luikov heat and mass transfer Institute of the National Academy of Sciences of Belarus, 15 P. Broŭki Street, Minsk 220072, Belarus
  • Anton M. Kuzmitski A. V. Luikov heat and mass transfer Institute of the National Academy of Sciences of Belarus, 15 P. Broŭki Street, Minsk 220072, Belarus

Abstract

In this work, the elemental and phase compositions as well as mechanical properties of the instrumental U9 steel surface layer alloyed with chromium atoms under the action of compression plasma flows, generated by the magnetoplasma compressor of compact geometry, were investigated. X-ray diffraction analysis, scanning electron microscopy, energy dispersion microanalysis, and microhardness measurements were used to study the modified layer structure and properties. The findings show that an increase of the energy density absorbed by the surface leads to growth of the alloyed layer thickness and to the increased surface erosion intensity and hence results in a decrease of the chromium concentration in this layer. X-ray diffraction analysis reveals the presence of the metastable γ-Fe phase in the alloyed layer. Existence of the metastable phase can be explained by its stabilization with the nitrogen atoms diffused from the residual atmosphere of the vacuum chamber. The concentration of this phase is depending on the treatment parameters. The formation of the surface layer dispersed structure leads to increase of the microhardness by a factor of two and more.

Author Biographies

Nikolai N. Cherenda, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

PhD (physics and mathematics); associate professor at the department of solid state physics, faculty of physics

Alexander A. Malashevich, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

masterʼs degree student at the department of solid state physics, faculty of physics

Vladimir V. Uglov, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

doctor of science (physics and mathematics), full professor; head of the department of solid state physics, fa culty of physics

Valentin M. Astashynski, A. V. Luikov heat and mass transfer Institute of the National Academy of Sciences of Belarus, 15 P. Broŭki Street, Minsk 220072, Belarus

doctor of science (physics and mathematics); deputy director for research

Anton M. Kuzmitski, A. V. Luikov heat and mass transfer Institute of the National Academy of Sciences of Belarus, 15 P. Broŭki Street, Minsk 220072, Belarus

senior researcher

References

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Published
2017-05-30
Keywords: compression plasma flows, structural and phase changes, alloying, instrumental steel
How to Cite
Cherenda, N. N., Malashevich, A. A., Uglov, V. V., Astashynski, V. M., & Kuzmitski, A. M. (2017). The structure and phase composition of the U9 steel surface layer alloyed with chromium atoms under the action of compression plasma flows. Journal of the Belarusian State University. Physics, 2, 102-107. Retrieved from https://journals.bsu.by/index.php/physics/article/view/446
Issue
No 2 (2017): Journal of the Belarusian State University. Physics
Section
Condensed State Physics

Copyright (c) 2017 Journal of the Belarusian State University. Physics

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