Improving the room-temperature bendability of Mg–3Al–1Zn alloy sheet by introducing a bimodal microstructure and the texture re-orientation

Chao He; Yibing Zhang; Ming Yuan; Bin Jiang; Qinghang Wang; Yanfu Chai; Guangsheng Huang; Dingfei Zhang; Fusheng Pan

doi:10.1007/s12613-021-2384-1

Volume 29 Issue 7

Jul. 2022

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2022 > 29(7): 1322-1333

Chao He, Yibing Zhang, Ming Yuan, Bin Jiang, Qinghang Wang, Yanfu Chai, Guangsheng Huang, Dingfei Zhang, and Fusheng Pan, Improving the room-temperature bendability of Mg–3Al–1Zn alloy sheet by introducing a bimodal microstructure and the texture re-orientation, Int. J. Miner. Metall. Mater., 29(2022), No. 7, pp. 1322-1333. https://doi.org/10.1007/s12613-021-2384-1

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Chao He, Yibing Zhang, Ming Yuan, Bin Jiang, Qinghang Wang, Yanfu Chai, Guangsheng Huang, Dingfei Zhang, and Fusheng Pan, Improving the room-temperature bendability of Mg–3Al–1Zn alloy sheet by introducing a bimodal microstructure and the texture re-orientation, Int. J. Miner. Metall. Mater., 29(2022), No. 7, pp. 1322-1333. https://doi.org/10.1007/s12613-021-2384-1

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Research Article

Improving the room-temperature bendability of Mg–3Al–1Zn alloy sheet by introducing a bimodal microstructure and the texture re-orientation

+ Author Affiliations

Corresponding authors:
Ming Yuan E-mail: yuanming@cqu.edu.cn

Bin Jiang E-mail: jiangbinrong@cqu.edu.cn
Received: 27 July 2021; Revised: 27 October 2021; Accepted: 16 November 2021; Available online: 19 November 2021

Abstract

Abstract

A significant enhancement of bendability was achieved by the introduction of bimodal microstructure for AZ31B alloy sheets via pre-compression and subsequent annealing (PCA) process. This combined treatment led to the c-axis of the extracted samples that were inclined by 30° to the rolling direction (30° sample) further shifting toward the rolling direction (RD) and resulting in a higher Schmid factor (SF) value of basal slip under the RD tensile stress. Furthermore, the bimodal microstructure that was introduced by the PCA process broke the damage bands (DBs) in the initial hot rolled AZ31B alloy sheets and gave rise to a more uniform strain distribution in the outer tension region of the bending samples, in which the tensile deformation was accommodated by the equally distributed {$ 10\bar{1} 2$} tension twinning and basal slip. Consequently, the bimodal microstructure, shifted basal texture and the modification of DBs were responsible for the significant enhancement in the bendability of the AZ31 alloys.
- magnesium alloy;
- pre-compression;
- texture;
- bimodal microstructure;
- bendability

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