Effect of the Pulsed Electron Beam Melting on a Chemical Composition and Surface Layer

Abstract – Investigation results of elemental com-position, structural-phase conditions and surface morphology behavior of the thin surface layers of the TiNi-based alloys modified with the pulsed electron beam melting are presented in the paper. The low-energy ( ∼ 30keV) high current ( ∼ 30 kA) electron beam (3–10 J/cm2) pulsed with 2–3 µs in time length have been used. An irradiation treat-ment was carried out in an argon atmosphere ( ~ 10–4 torr) at different contents of carbon and oxygen impurities in a residual atmosphere. Correlation between the subsurface layers ele-mental composition of the Ti49.5Ni50.5 alloy and sur-face treatment conditions (electrolytical polished and irradiated) is shown. 1