Formation of the Structure and Properties of the Near-Surface Layer in Alloys of the Ti–6Al–4V–H System Under Irradiation with a Pulsed Electron Beam

The effect of pulsed electron beam (PEB) irradiation modes on the structure formation and properties of the near-surface layer of titanium alloys of the Ti–6Al–4V–H system has been studied. The microhardness, elasticity modulus, friction coefficient, and plasticity (Hμ/E) and resistance (Hμ3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\mathrm{H}}_{\upmu }^{3}$$\end{document} / E2) indices have been determined. PEB irradiation in the mode without surface melting is shown to reduce the strength characteristics and the Hμ/E and Hμ3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\mathrm{H}}_{\upmu }^{3}$$\end{document} / E2 indices of the near-surface layer of alloys. Because of PEB irradiation in the surface melting mode, a two-phase α + α'' lamellar structure with increased Hμ/E and Hμ3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\mathrm{H}}_{\upmu }^{3}$$\end{document} / E2 indices is formed in the near-surface layer of alloys ~10 μm thick. The effect of the near-surface layer properties on the alloy resistance to deformation under tension and creep has been studied.