Strain rate dependence of the slip transfer through a penetrable high angle grain boundary in copper
Strain rate dependence of the slip transfer through a penetrable high angle grain boundary in copper
复制标题
DOI：
10.1016/j.scriptamat.2017.05.042
复制
发表时间：
2017-09
影响因子：
6
通讯作者：
N. Malyar;G. Dehm;C. Kirchlechner
中科院分区：
文献类型：
--
作者：
N. Malyar;G. Dehm;C. Kirchlechner
在应变速率为10−~10~10−·4s−~(-1)的条件下，用微柱压缩的方法分析了具有可穿透高角度晶界的铜柱的应变率依赖关系。含晶界的铜柱表现出明显的应变率依赖关系，Fm=0.04±0.02，而单晶柱似乎具有弱的应变率依赖关系。结果表明，晶界位错线的运动是这类晶界含柱形变的关键过程，位错线需要从入向滑移面向出向滑移面转变。
Micro pillar compression is used to analyze the strain rate dependence of copper pillars containing a penetrable high-angle grain boundary viain situcompression tests at strain rates ranging from 10− 1to 10− 4s− 1. While the grain-boundary containing pillars exhibit a clear strain-rate dependence ofm= 0.04 ± 0.02, their single crystal counterparts seem to have a weak strain rate dependence ofm= 0.01 ± 0.01. The results strongly suggest that the movement of the dislocation line in the grain boundary, required to change its orientation from the incoming to the outgoing slip plane, is the critical process in deforming this kind of grain-boundary containing pillars.