论文部分内容阅读
对晶粒组元因晶体生长时沿晶界发生旋转的铜双晶体进行了恒定塑性应变幅下的循环形变研究,塑性应变幅为1.5X10-3通过扫描电子显微镜-电子通道衬度技术（SEM-ECC）对滑移形貌和位错组态的演化进行了观察,发现由于晶粒内部的几何效应使沿晶界的位错组态随着晶粒的旋转方向的变化也相应发生变化,逐渐表现为由滑移带与晶界的相互作用过渡到形变带与晶界的相互作用.形变带Ⅱ（DB Ⅱ）对于主滑移有着明显的阻碍作用.晶界无位错区（DFZ）伴随着形变带Ⅱ在晶界的出现而产生.胞状结构的形成是由于次滑移系的开动使形变带Ⅱ中的位错墙结构先破坏而后形成.
Cyclic deformation of the copper bimodal with constant grain strain amplitude was studied for the grain components of copper double crystals rotating along the grain boundaries due to crystal growth. The plastic strain amplitude was 1.5X10-3. SEM (scanning electron microscopy - electron channel contrast technique -ECC) observed the evolution of slip morphology and dislocation configuration, and found that the dislocation configuration along the grain boundaries changes correspondingly with the rotation direction of the grains due to the geometric effect inside the grains, It is shown that the interaction between the slip band and the grain boundary and the interaction between the deformation zone and the grain boundary gradually appear.The deformation zone Ⅱ (DB Ⅱ) has obvious obstruction to the main slip.The grain boundary dislocation zone (DFZ) Accompanied by the appearance of deformation zone Ⅱ in the grain boundary.The formation of the cellular structure is due to the sub-slip system to start the dislocation wall in the deformation zone Ⅱ disrupted the structure and then formed.