体心立方金属韧脆转变机制研究进展

韩卫忠, 卢岩, 张雨衡

Mechanism of Ductile-to-Brittle Transition in Body-Centered-Cubic Metals：A Brief Review

HAN Weizhong, LU Yan, ZHANG Yuheng

图3 热激活条件下螺位错的迁移[30]

Fig.3 Double-kink assisted migration of screw dislocation under thermal activation[30] (Up—Peierls barrier, τg—time constant for generating a kink pair, τm—time constant for moving the kinks to the extent of the dislocation line, νs—screw dislocation velocity)