Abstract
This article is focused on research of properties of vacuum-plasma coatings Ti+TiVN and V+TiVN applied to the surface of titanium alloys Ti-6Al-4V and VT8M-1(rus.) (Ti-5.7Al-3.8Mo-1.2Zr-1.3Sn) in ultrafine-grained (UFG) states obtained by two different severe plastic deformation (SPD) techniques-equal-channel angular pressing (ECAP) and rotary swaging (RS). The influence of substrate UFG structure on coatings service properties improvement has been established. It was demonstrated that complex hardening of titanium alloy including formation of bulk UFG structure and applying vacuum-plasma protective coating to the surface significantly increases resistance to erosive wear of the latter in comparison with the substrate having the initial coarse-grained structure.
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