Friction and wear behavior of Mo-N diffusion layer on Ti6A14V alloy surface

Tow kinds of Mo-N alloyed layers were fabricated on the surface of Ti6A14V alloy by Xu-Tec process. One process was Mo-diffusing with nitriding simultaneously, and the other is nitriding after Mo-diffusing. This paper investigated their friction and wear behaviors against a polished 2100 steel counterbody ball under ball-on-disc test condition. It has been found that both the two Mo-N diffusion layers have excellent wear-resistant behavior in sliding but their friction coefficient increases slightly. The wear rate for Mo-diffusing with simultaneous nitriding 400 times less than Ti6A14V and 1080 times less for nitriding after Mo-diffusing.