Physical–Mechanical Properties of Synthesized Layers of Ti–Ni–Nb-Based Surface Alloys, Formed on the Surface of TiNi Alloy

The physical-mechanical properties of the Ti–Ni–Nb–Si-based surface alloy formed on the TiNi substrate using the electron-beam synthesis have been studied. The surface alloy has 2 times higher values of the microhardness and elastic modulus than the TiNi-substrate. On the contrary, the values of the elastic-plastic parameters are close to those of the substrate. It was found that at a depth of ≤250 nm, the deformation behavior and physical-mechanical properties of the surface alloy differ due to the heterogeneity of the surface alloy structure.