Interactions between dislocations and twins in deformed titanium aluminide crystals

论文摘要

Using scanning, transmission electron microscopy and aberration-corrected scanning transmission electron microscopy, we have studied the interactions between dislocations and twins in impact deformed polysynthetic twinned TiAl crystal. The 1/3 < 111] and 1/6 < 211] step dislocations on coherent twin boundaries reveal the interactions of glissile 1/2 < 101> dislocations with the coherent twin boundaries.An abnormal stacking fault was found adjacent to the coherent twin boundary. It has the same stacking sequence but different atom species in the [110] direction with an additional displacement of 1/4[110]in two neighboring {111} layers, and is likely induced by the slip of a 1/12[112]（i.e. 1/4[110] + 1/6[211]）dislocation.

论文目录

文章来源

类型: 期刊论文

作者: Guang Yang,Shang-Yi Ma,Kui Du,Dong-Sheng Xu,Sen Chen,Yang Qi,Heng-Qiang Ye

来源: Journal of Materials Science & Technology 2019年03期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 化学

单位: School of Materials Science and Engineering, Northeastern University,Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences,Division of Titanium Alloys, Institute of Metal Research, Chinese Academy of Sciences,Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Northeastern University

基金: Foundation of China (Grant Nos. 51390473 and 51771203),the Key Research Program of Frontier Sciences,Chinese Academy of Sciences,the National Key Research and Development Plan (Grant No. 2016YFB0701304),the Fundamental Research Fund for the Central Universities (Grant No. N140108001)

分类号: O772

页码: 402-408

总页数: 7

文件大小: 1226K

下载量: 21

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