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Mechanical behavior and microstructural characteristics of magnesium alloy containing {10-12} twin lamellar structure

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Abstract

A hot-rolled AZ31 Mg alloy sheet was subjected to dynamic plastic deformation parallel to the rolling direction with the aim of introducing {10-12} twins. Subsequent tensile tests were carried out along the predeformed direction and the initial transverse direction (TD). It was found that untwinning led to a significant drop in yield stress when tension is carried out along the predeformed direction. And {10-12} twins and strain caused by twinning were recovered by untwinning. The tensile yield stress increased slightly with prestrain was correlated with the texture hardening caused by untwinning. When tension is carried out along initial TD, {10-12} twinning activity was restrained and slip dominated plastic deformation. The tensile yield stress increased significantly with prestrain was strongly correlated with the hardening contributions of {10-12} twins. {10-12} twinning led to the obvious yield stress in-plane anisotropy but had little effect on the maximum flow stress.

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ACKNOWLEDGMENTS

This work was supported by National Natural Science Foundation of China (Grant Nos. 51071183, 50890170, and 51271208) and the Fundamental Research Funds for the Central Universities (Grant No. CDJXS11132225).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Chongqing University, Chongqing, 400030, China

    Chao Lou, Xiyan Zhang, Runhong Wang & Qing Liu

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  1. Chao Lou
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  2. Xiyan Zhang
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  3. Runhong Wang
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  4. Qing Liu
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Correspondence to Xiyan Zhang.

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Lou, C., Zhang, X., Wang, R. et al. Mechanical behavior and microstructural characteristics of magnesium alloy containing {10-12} twin lamellar structure. Journal of Materials Research 28, 733–739 (2013). https://doi.org/10.1557/jmr.2012.394

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  • DOI: https://doi.org/10.1557/jmr.2012.394

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