Changes in the near-surface layer of steel processed by a pulsed electron beam

  • Natallia I. Poliak Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus
  • Victor M. Anishchik Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus
  • Valery V. Khodasevich Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

Abstract

The effect of irradiation by a pulsed electron beam with an energy of E = 300 keV, number of pulses of N = 100, pulse duration of τ = 50 ns and current density of J = 3 A/cm2 on the surface morphology and physico-mechanical properties of near-surface layer of hardened steel grade 65 has been studied. It was found that the treatment of samples with an electron beam leads to the formation of a more developed surface relief (with cone-shaped formations of various sizes) as a result of radiation erosion, the redistribution of carbon atoms in the near-surface layer due to ultrafast heating and abrupt cooling, the resulting appearance of a high concentration of vacancies and stress fields affecting the formation oxycarbides of complex composition. A change in the physical and mechanical properties (Vickers microhardness (HVμ), Martens hardness (HM), indentation hardness (HIT), Young’s modulus (EIT), indentation creep (СIT), еlastic reverse deformation work of indentation (Wel), total mechanical work of indentation (Wtotal), еlastic component of work (ηIT) and indentation relaxation (R)) of the modified steel layer was revealed. It is shown that the change in the parameters of the fine structure (the period of the crystal lattice, the value of the microstresses and the size of the mosaic blocks) obtained by X-ray diffraction analysis correlates with a change in its physical and mechanical properties.

Author Biographies

Natallia I. Poliak, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

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

Victor M. Anishchik, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

doctor of science (physics and mathematics), full professor; professor at the department of solid state physics and nanotechnologies, faculty of physics

Valery V. Khodasevich, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

PhD (physics and mathematics), docent; leading specialist in educational equipment at the department of solid state physics and nanotechnologies, faculty of physics

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Published
2024-05-29
Keywords: pulsed electron beam, steel, surface morphology, phase composition, structure, hardness, Young’s modulus
How to Cite
Poliak, N. I., Anishchik, V. M., & Khodasevich, V. V. (2024). Changes in the near-surface layer of steel processed by a pulsed electron beam. Journal of the Belarusian State University. Physics, 2, 84-92. Retrieved from https://journals.bsu.by/index.php/physics/article/view/6205
Issue
No 2 (2024): Journal of the Belarusian State University. Physics
Section
Condensed State Physics

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