[G] Titanium and Its Alloys

[370] Effect of V addition on dislocation mobility in beta titanium alloys

*Rei Yano¹, Tatsuya Morikawa², Shigeto Yamasaki², Tomohito Tsuru³, Masaki Tanaka² (1. Graduate school,Kyushu Univ., 2. Kyushu Univ., 3. Japan Atomic Energy Agency)

Keywords:beta titanium alloys、dislocation mobility、thermally activated process、brittle-to-ductile transition

β型チタン合金Ti-22V，Ti-17Vについて，広い温度域で衝撃試験，引張試験，歪速度急変試験を行い，転位移動の活性化エンタルピーの温度依存性を求め，転位易動度に及ぼすV添加の影響を考察する．