Plastic anisotropy in b.c.c. transition metals
Plastic anisotropy in b.c.c. transition metals
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DOI：
10.1016/s0921-5093(97)00386-9
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发表时间：
1997-08
期刊：
影响因子：
6.4
通讯作者：
K. Edagawa;Toshio Suzuki;S. Takeuchi
中科院分区：
文献类型：
--
作者：
K. Edagawa;Toshio Suzuki;S. Takeuchi
b.c.c.中的<$111型双螺位错运动。晶体的热激活扭结对形成的概念进行了研究。为了解释b.c.c.对于过渡金属，在（111）平面中假定二维Peierls势，而不指定滑移平面。利用二维Peierls势，计算了临界流动应力和积分滑移面方向随应力方向和温度的变化关系。用一个在稳定位置周围具有六边形轮廓的精细Peierls势计算，成功地定量地再现了α-Fe的塑性数据。
Motion of a 〈111〉 screw dislocation in a b.c.c. crystal has been investigated in the concept of thermally activated kink pair formation. To explain the plastic anisotropy of b.c.c. transition metals, a two dimensional Peierls potential is assumed in the (111) plane without specifying the glide plane. Using the two dimensional Peierls potential, the critical flow stress and the direction of integrated slip plane have been calculated as a function of the direction of the applied stress and temperature. The calculation with a refined Peierls potential, which has hexagonal contours around the stable positions, successfully reproduces quantitatively the plastic data of α-Fe.