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Improving Strength and Formability of Rolled AZ31 Sheet by Two-Step Twinning Deformation

Abstract

The present work aims to improve strength and stretch formability of rolled AZ31 sheet by two-step twinning deformation, i.e., compression (8%) along the rolling direction (RD) and subsequent tension (5%) along RD. A recrystallization annealing was carried out between two twinning deformations to avoid detwinning. It shows that two-step twinning deformation can form strong c-axis//RD texture and generate profuse crossed twin lamellae in each grain. The former can generate a refinement hardening effect to enhance the strength and the latter can contribute to a high stretch formability at room temperature.

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Acknowledgements

This project was financially supported by the National Natural Science Foundation of China (51601154, 51701033), the Fundamental Research Funds for the Central Universities (XDJK2019B003), Chongqing Science and Technology Commission (cstc2018jcyjAX0022), and Chongqing Municipal Education Commission (KJQN201901504), National Natural Science Foundation of China (51531002, U1764253).

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Correspondence to Bin Jiang or Bo Song.

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Yang, Q., Jiang, B., Song, B. et al. Improving Strength and Formability of Rolled AZ31 Sheet by Two-Step Twinning Deformation. JOM 72, 2551–2560 (2020). https://doi.org/10.1007/s11837-019-03894-x

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