Microstructure and properties of GR2 titanium treated by plasma-pulsed detonation

Abstract The modified layers were prepared on the GR2 titanium by plasma-pulsed detonation technology (PPD) in the compressed air (Air), argon (Ar) and nitrogen (N2) atmospheres, respectively. We observed that the modified layer was composed of TiN, TiN0.3, TixOy and Ti phases. The second phase strengthening, the fine grain strengthening and the dislocations strengthening are the main reasons for the improvement of wear resistance. Compared with the substrate, all modified layers have lower friction coefficient and better wear resistance. The wear volumes of three kinds of modified layers decrease by about 97%, 72% and 95%, respectively.