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Significantly improving the bending formability of AZ31 Mg alloy by pre-introducing {10 [formula omitted] 2} tensile twins.

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Title: Significantly improving the bending formability of AZ31 Mg alloy by pre-introducing {10 [formula omitted] 2} tensile twins.
Authors: Sun, Longhui1 (AUTHOR), Jing, Hongchen1 (AUTHOR), Zhang, Hua1 (AUTHOR) zhanghua@ytu.edu.cn, Sun, Liying1 (AUTHOR), Wang, Lifei2 (AUTHOR), Lu, Liwei3 (AUTHOR), Shin, Kwang Seon1,4 (AUTHOR), Duishenaliev, T.B.5 (AUTHOR)
Source: Progress in Natural Science. Feb2026, Vol. 36 Issue 1, p110-118. 9p.
Abstract: {10 1 ¯ 2} tensile twins were introduced by pre-compressing the rolled AZ31 Mg alloy sheet along the transverse direction (TD) with a strain of 3 %, aiming to investigate the effect of pre-existing twins on its bending deformation behavior. For the AZ31 Mg alloy, the pre-existing {10 1 ¯ 2} tensile twins significantly improved the mechanical properties, the tension-compression yield asymmetry coefficient (0.57 vs. 0.35), and the bending property (bend angle: 97° vs. 65°). The pre-existing {10 1 ¯ 2} twins led to the deflection of the c-axis of the grains, thus modifying the strong (0001) basal texture, which improved the tension-compression yield asymmetry, making the strain distribution during the bending process in each region of the specimen more uniform. The basal slip caused by grain deflection on the rolling direction (RD)-normal direction (ND) plane increased the thickness-direction strain of the specimen during the bending deformation process. Moreover, the introduction of a large number of twin lamellae effectively subdivided and refined the grains, enhancing the plastic deformation ability of the specimen. In summary, these factors led to a significant improvement in the bending formability of the AZ31 Mg alloy. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:{10 1 ¯ 2} tensile twins were introduced by pre-compressing the rolled AZ31 Mg alloy sheet along the transverse direction (TD) with a strain of 3 %, aiming to investigate the effect of pre-existing twins on its bending deformation behavior. For the AZ31 Mg alloy, the pre-existing {10 1 ¯ 2} tensile twins significantly improved the mechanical properties, the tension-compression yield asymmetry coefficient (0.57 vs. 0.35), and the bending property (bend angle: 97° vs. 65°). The pre-existing {10 1 ¯ 2} twins led to the deflection of the c-axis of the grains, thus modifying the strong (0001) basal texture, which improved the tension-compression yield asymmetry, making the strain distribution during the bending process in each region of the specimen more uniform. The basal slip caused by grain deflection on the rolling direction (RD)-normal direction (ND) plane increased the thickness-direction strain of the specimen during the bending deformation process. Moreover, the introduction of a large number of twin lamellae effectively subdivided and refined the grains, enhancing the plastic deformation ability of the specimen. In summary, these factors led to a significant improvement in the bending formability of the AZ31 Mg alloy. [ABSTRACT FROM AUTHOR]
ISSN:10020071
DOI:10.1016/j.pnsc.2025.12.002