Microstructure and wear resistance of Ti-3Zr-2Sn-3Mo-15Nb (TLM) alloy

The effects of heat treatment on the microstructure and phase constitution of Ti-3Zr-2Sn-3Mo-15Nb (TLM) alloy were investigated by optical microscopy, X-ray diffractometry and transmission electron microscopy. The wear resistance of TLM alloy was tested by sliding wear in comparison with as-annealed Ti-6Al-4V and as-aged Ti-13Nb-13Zr. The results show that the specimen cooled from alpha+ss dual phase region is mainly composed of ss, alpha and alpha '' phases, while the specimen cooled from ss single phase region is mainly composed of ss and alpha phases, in which ss phase is predominate. The coefficient of friction of TLM alloy treated at 680 degrees C, 1 h, AC+510 degrees C, 6 h, AC is smaller than that of others, thereby TLM alloy has a better wear resistance which is also proved by the surface topography after wear test.Metallurgy & Metallurgical EngineeringSCI(E)CPCI-S(ISTP)