Observation of Twin Transmission Process in Mg Alloys by In Situ EBSD

Guo Changfa; Xin Renlong; Wu GuilinLiu FeiyaHu GuangshanLiu Qing

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Observation of Twin Transmission Process in Mg Alloys by In Situ EBSD

机译：Observation of Twin Transmission Process in Mg Alloys by In Situ EBSD

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Twin pairs are frequently observed at the common grain boundaries of Mg alloys. The formation of twin pairs is associated with a twin transmission (TT) process. Investigating the TT process is important for understanding the deformation mechanism of Mg alloys. Here, the authors report an in situ electron backscatter diffraction (EBSD) examination on the TT process in AZ31 Mg alloys subjected to tensile deformation. TT process is clearly observed by band contrast images resulting in the formation of twin chains as strain increases. Interestingly, transmitted twins are developed in advance in form of non-indexing dislocations or twins in neighboring grain. The TT direction is roughly along the shear plane normal or shear direction of the paired twins. In addition, multiple twin variants are activated by TT mechanism and nucleation of new twins at pre-existing twin boundaries.

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来源
《Advanced Engineering Materials》 |2019年第7期|共8页
作者
Guo Changfa; Xin Renlong; Wu GuilinLiu FeiyaHu GuangshanLiu Qing;
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作者单位

Chongqing Univ, Coll Mat Sci & Engn, Joint Int Lab Light Alloys MOE, Chongqing, Peoples R China;

Jiaxing Univ, Coll Mech & Elect Engn, Jiaxing, Peoples R China;

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正文语种英语
中图分类工程材料学;
关键词
in situ EBSD; magnesium alloys; twinning; twin transmission; variant selection;

Observation of Twin Transmission Process in Mg Alloys by In Situ EBSD

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