Multiscale-deformation behavior of magnesium alloy sheet during in-plane cyclic loading

由于对轻质材料的需求不断增加，镁合金在各个行业中受到了大量关注。然而，它们的变形行为还没有得到很好的理解。本研究旨在探讨镁合金板材的循环拉压行为，实验和理论。在不同加载条件下的实验结果表明，孪晶的活跃性在加工硬化行为中起着重要的作用。在实验结果的基础上，提出了一个新的理论模型来预测基于晶体变形的变形行为。模拟结果准确地预测了加工硬化行为和织构的演变，验证了模型的正确性。上述结果为镁合金板材的变形行为提供了新的认识。

Magnesium alloys are receiving a lot of attention in various industries because of an increasing demand for lightweight materials. However their deformation behavior has not been understood well. The present study aims at investigating the cyclic tension-compression behavior in magnesium alloy sheets both experimentally and theoretically. The experimental results under various loading conditions showed that the activity of twinning played a significant role in the work-hardening behavior. Based on the results obtained from the experiment, a new theoretical model was proposed to predict the deformation behavior based on the crystalline deformation. The simulation predicted the work-hardening behavior as well as the evolution of texture accurately, verifying the model. The above results brought new insight into the deformation behavior of magnesium alloy sheets.