变形Mg-Gd合金中退孪生组态的透射电子显微研究  

TEM study of characteristic structure associated with de-twinning in deformed Mg-Gd alloy

作　　者：王子荣[1] 孙威[1] 李万鹏[1] 杨旭[1] 

机构地区：[1]北京工业大学固体微结构与性能研究所,北京100124

出　　处：《电子显微学报》2017年第6期542-546,共5页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(Nos.11274027;51171004)

摘　　要：本文利用透射电子显微镜(TEM)对室温冷轧变形Mg-5Gd(at.%)合金中共轴{10 12}孪晶变体的相互作用组态进行了细致的表征,揭示了其中涉及的退孪晶结构特征,并对退孪生发生的原因及过程进行解释,认为这种退孪生的本质是一种在相互作用原始孪晶中发生逆向二次孪生的过程,并且退孪生从孪晶界面处开始向孪晶内部进行。Interaction of coaxial { 1012 } twins leading to the occurrence of de-twinning and the related structural variations in the Mg-5Gd alloy （at. %） cold rolled at room temperature have been characterized by transmission electron microscopy （TEM）. Based on TEM observation results,possible reason for the de-twinning involved in twin-twin interaction is analyzed. It is shown that the de- twinning can be described as a reverse secondary twinning process occurred in a primary twin, proceeding into the twin from its boundary.

关 键 词：镁合金 退孪晶 相互作用 晶格扭转 显微表征 

分 类 号：TG115.21[金属学及工艺—物理冶金] TG146.22[金属学及工艺—金属学]