Review on Improvements in Surface Performance of Tial-Based Alloys by Double Glow Plasma Surface Alloying Technology

摘要

TiAl-based alloys are one kind of innovative high temperature materials which have been extensively applied in aviation, space flight, military industry and other industrial sectors due to their high strength to weight ratio and other positive merits. However, insufficient wear resistance and poor oxidation resistance have restricted their much wider applications. Double glow plasma surface alloying (DGPSA) process has been confirmed as an effective surface modification technology to improve the surface performance of TiAl-based alloys. In this paper, the studies and applications of DGPSA process in improving the surface performance of TiAl-based alloys were reviewed and summarized.