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 α＋β dual phase region is mainly composed of β, α and α＂ phases, while the specimen cooled from fl single phase region is mainly composed of β and a phases, in which βphase is predominate, The coefficient of friction of TLM alloy treated at 680 ℃, 1 h, AC＋510℃, 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.