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<p><b>Abstract</b>—The effect of irradiation with pulsed helium ion beams and helium plasma on the structural characteristics and mechanical properties of titanium alloys with the following compositions (wt %): Ti–0.5 Nb–0.5 Mo–3 Zr–3 Al; Ti–1 Nb–1 Mo–3 Zr–3 Al; and Ti–1.5 Nb–1.5 Mo–3 Zr–3 Al was investigated. The irradiation was carried out using a Plasma Focus type device with power flux densities of <i>q</i> = 2 × 10<sup>8</sup> W/cm<sup>2</sup> for helium ions and <i>q</i> = 4 × 10<sup>7</sup> W/cm<sup>2</sup> for helium plasma, with pulse durations of 20–100 ns. Metallographic and X-ray phase analyses were performed and the mechanical properties (ultimate strength, yield strength, and elongation) and microhardness of the alloy samples before and after irradiation were determined. The irradiation caused a slight (less than 10%) decrease in the strength and plasticity indicators of the alloy samples, while the microhardness remained practically unchanged.</p>

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Investigation of the Effect of Pulsed Helium Ion and Helium Plasma Flows on the Structure and Mechanical Properties of Surface Layers of Ti–Nb–Mo–Zr–Al Alloys

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • K. V. Sergienko,
  • M. A. Sevostyanov,
  • A. S. Demin,
  • E. V. Morozov,
  • N. A. Epifanov,
  • S. V. Konushkin,
  • M. A. Kaplan,
  • Ya. A. Morozova,
  • A. G. Kolmakov

摘要

Abstract—The effect of irradiation with pulsed helium ion beams and helium plasma on the structural characteristics and mechanical properties of titanium alloys with the following compositions (wt %): Ti–0.5 Nb–0.5 Mo–3 Zr–3 Al; Ti–1 Nb–1 Mo–3 Zr–3 Al; and Ti–1.5 Nb–1.5 Mo–3 Zr–3 Al was investigated. The irradiation was carried out using a Plasma Focus type device with power flux densities of q = 2 × 108 W/cm2 for helium ions and q = 4 × 107 W/cm2 for helium plasma, with pulse durations of 20–100 ns. Metallographic and X-ray phase analyses were performed and the mechanical properties (ultimate strength, yield strength, and elongation) and microhardness of the alloy samples before and after irradiation were determined. The irradiation caused a slight (less than 10%) decrease in the strength and plasticity indicators of the alloy samples, while the microhardness remained practically unchanged.