抄録
A Ti-10 wt% Cr alloy was quenched from a high temperature (β region) and then tempered at various temperatures from room temperature to 800°C. The changes in physical properties, viz., internal friction specific heat coefficient of thermal expansion and hardness, with tempering were measured. The experimental results are summarized as follows:
(1) Heat evolution and abnormal contraction were observed at 250°∼350°C. After tempering at 150°∼300°C, the internal friction decreased. It is suggested that these changes correspond to the ω formation from retained β.
(2) Heat absorption and abnormal expansion were observed at 400°∼450°C. After tempering at about 400°∼450°C, the internal friction increased. These changes may correspond to redissolution of ω to β phase.
(3) Heat evolution and contraction were observed at about 490°C. The change seems to correspond to the α formation.
