Effect of Twinning and Detwinning on Mechanical Proprieties of AZ31 Magnesium Alloy

Chen Qiangqiang; Song Guangsheng; Xu Yong; Zhang Shihong

doi:10.15980/j.tzzz.2015.03.029

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Effect of Twinning and Detwinning on Mechanical Proprieties of AZ31 Magnesium Alloy
Vol. 35, Issue 3, Pages: 325-329(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.03.029

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[1]陈强强,宋广胜,徐勇,张士宏.孪晶和解孪晶对AZ31镁合金力学性能的影响[J].特种铸造及有色合金,2015,35(03):325-329.

Chen Qiangqiang, Song Guangsheng, Xu Yong, et al. Effect of Twinning and Detwinning on Mechanical Proprieties of AZ31 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 35(3):325-329(2015)
[1]陈强强,宋广胜,徐勇,张士宏.孪晶和解孪晶对AZ31镁合金力学性能的影响[J].特种铸造及有色合金,2015,35(03):325-329. DOI： 10.15980/j.tzzz.2015.03.029.

Chen Qiangqiang, Song Guangsheng, Xu Yong, et al. Effect of Twinning and Detwinning on Mechanical Proprieties of AZ31 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 35(3):325-329(2015) DOI： 10.15980/j.tzzz.2015.03.029.

摘要

以商用热轧AZ31镁合金板材为研究对象

室温下通过沿轧制方向（Rolling Direction）、轧板法向（Normal Direction）以及RD-ND 3种压缩变形试验

研究了AZ31镁合金在压缩变形过程中的孪晶、解孪晶现象及其对力学性能的影响。结果表明

沿RD压缩后晶粒取向发生变化

变形后的组织中出现了明显的平行带状和透镜状孪晶带。沿ND压缩时

{1012}拉伸孪晶没有发生

且无论压缩变形量大小

金相组织中均无孪晶出现

塑性变形主要依靠滑移产生。解孪晶时屈服应力下降明显

且完全解孪晶所需应变比孪晶小。

Abstract

Twinning

detwinning and their effects on mechanical properties of commercial hot-rolled AZ31 Mg alloy were investigated under three compression along rolling direction（RD）

normal direction（ND）and RD-ND at room temperature

respectively.The results show that the grain orientation is changed and there exists many distinctly parallel and lenticular twinning bands in microstructure after compression along RD.While compression along ND

no matter how much the specimens was compressed

the absence of{1012}extension twinning and any twinning microstructure can be observed

which reveals that plastic deformation is mainly dependent on slips under compression along ND.The yield stress is decreased significantly during detwinning process

and the strain needed by complete detwinning is smaller than that of twinning.

关键词

AZ31镁合金孪晶解孪晶力学性能

Keywords

AZ31MagnesiumTwinning GrainDetwinningMechanical Proprieties

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