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Significantly improving the bending formability of AZ31 Mg alloy by pre-introducing tensile twins

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Longhui Sun^a, Hongchen Jing^a, Hua Zhang^a^,^*, Liying Sun^a, Lifei Wang^b, Liwei Lu^c, Kwang Seon Shin^a^,^d, T.B. Duishenaliev^e

Progress in Natural Science: Materials International | 2026, 36(1) : 110 - 118

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Progress in Natural Science: Materials International | 2026, 36(1): 110-118

• Research Article •

Significantly improving the bending formability of AZ31 Mg alloy by pre-introducing

tensile twins

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Longhui Sun^a, Hongchen Jing^a, Hua Zhang^a^,^*, Liying Sun^a, Lifei Wang^b, Liwei Lu^c, Kwang Seon Shin^a^,^d, T.B. Duishenaliev^e

Affiliations

^aShandong Key Laboratory of Advanced Structural Materials Genome Engineering, Yantai University, Yantai, 264005, China

^bDepartment of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China

^cHunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material, Hunan University of Science and Technology, Xiangtan, 411201, China

^dResearch Institute of Advanced Materials, Seoul National University, Seoul, 08826, South Korea

^eKyrgyz State Technical University Named After Iskhak Razzakov, Bishkek, 720044, Kyrgyzstan

Published: 2026-02-22 doi: 10.1016/j.pnsc.2025.12.002

Outline

Abstract

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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 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 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.

Key words

Mg alloy / Pre-compression / Tension-compression asymmetry / Bending behavior / {10 1^- 2} tensile twin

Cite this Article

Longhui Sun, Hongchen Jing, Hua Zhang, Liying Sun, Lifei Wang, Liwei Lu, Kwang Seon Shin, T.B. Duishenaliev. Significantly improving the bending formability of AZ31 Mg alloy by pre-introducing

tensile twins[J]. Progress in Natural Science: Materials International, 2026 , 36 (1) : 110 -118 . DOI: 10.1016/j.pnsc.2025.12.002

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Funding

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National Natural Science Foundation of China(52274397)
Shandong Provincial Natural Science Foundation of China(ZR2024JQ020)
Graduate Innovation Foundation of Yantai University, China(KGIFYTU2520)

Appendix

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Year 2026 volume 36 Issue 1

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Cite this Article

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Article Info

doi: 10.1016/j.pnsc.2025.12.002

Receive Date：2025-09-22
Online Date：2026-06-03
Published：2026-02-22

表12种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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