Evaluation of wear corrosion characteristics of Ti-6Al-4V in quasi-human body environment and improvement of wear corrosion characteristics by gas nitriding

摘要

Ti-6Al-4V is well known as a material used for artificial joints, however this material has inferior wear corrosion characteristics. For this reason, surface modification was required. At present, wear corrosion characteristics were for improving those characteristics not fully understood comprehensively both from wear and corrosion behaviors. Therefore, in this study, wear corrosion characteristics of Ti-6Al-4V were evaluated comprehensively both from wear and corrosion characters of this material and some trials for improving wear corrosion characteristics by gas nitriding were conducted. As a result, wear corrosion behavior was well understood from the viewpoint of the mutual interaction of wear and corrosion. Also, the improvement in both of wear and corrosion characteristics was recognized when gas nitriding was applied to the surface of the specimen.