Physicomechanical properties of Ti-Ta-based surface alloys synthesized on the NiTi shape memory alloy

Abstract

This paper presents a research data on investigation of physicomechanical properties of Ti-Ta-based surface alloys, synthesized on the NiTi-substrate. The Ti-Ta-based surface alloys were formed in a single vacuum cycle, that comprises preliminary low-energy high-current pulsed electron beam (LEHCPEB), Ti-Ta film deposition by magnetron sputtering, and pulsed electron beam melting of the system “Ti-Ta-based surface alloy/NiTi-substrate”. Experimental investigation and analysis of physicomechanical properties of Ti-Ta-based surface alloys on the NiTi-substrate were performed by method of nanoindentation. Our data suggest that the electron beam synthesis of Ti-Ta-based surface alloys, different in thickness and composition on the NiTi-substrate, leads to a gradient change of physicomechanical parameters. Modification of the surface of NiTi alloy changed the functional (pseudoelastic) properties by no more than 10%.