Unloading behaviors of the rare-earth magnesium alloy ZE10 sheet
Unloading behaviors of the rare-earth magnesium alloy ZE10 sheet
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稀土镁合金ZE10板材的卸载行为
DOI：
10.1016/j.jma.2020.02.023
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发表时间：
2021-05-15
影响因子：
17.6
通讯作者：
Wu, Peidong
中科院分区：
文献类型：
--
作者：
Tang, Weiqin;Lee, Jeong Yeon;Wu, Peidong
镁合金由于其晶体结构的低对称性、低弹性模量（约45 GPa）和低屈服应力，在卸载过程中表现出较强的非弹性行为。随着镁合金的不断发展，其卸载行为的研究越来越少，尤其是稀土镁合金。本文通过力学试验和晶体塑性模拟研究了稀土镁合金ZE 10板材的卸载行为。根据应力-应变曲线、非弹性应变、弦线模量和主动变形机制，表征了ZE 10板材卸载行为的显著各向异性和加载路径依赖性。非弹性应变通常在压缩加载-卸载（L-UL）下比在拉伸L-UL下大，在拉伸L-UL下沿沿着横向（TD）比沿沿着轧制方向（RD）大，并且在压缩L-UL下沿沿着RD比沿沿着TD大。结果表明，基底滑移、孪生和去孪生是影响ZE 10板材卸载行为的主要因素。(C)2020年重庆大学。Elsevier B. V.代表KeAi Communications Co. Ltd.提供的出版服务。
Due to their low symmetry in crystal structure, low elastic modulus (similar to 45 GPa) and low yielding stress, magnesium (Mg) alloys exhibit strong inelastic behaviors during unloading. As more and more Mg alloys are developed, their unloading behaviors were less investigated, especially for rare-earth (RE) Mg alloys. In the current work, the unloading behaviors of the RE Mg alloy ZE10 sheet is carefully studied by both mechanical tests and crystal plasticity modeling. In terms of the stress-strain curves, the inelastic strain, the chord modulus, and the active deformation mechanisms, the substantial anisotropy and the loading path dependency of the unloading behaviors of ZE10 sheets are characterized. The inelastic strains are generally larger under compressive Loading-UnLoading (L-UL) than under tensile L-UL, along the transverse direction (TD) than along the rolling direction (RD) under tensile L-UL, and along RD than along TD under compressive L-UL. The basal slip, twinning and de-twinning are found to be responsible for the unloading behaviors of ZE10 sheets. (C) 2020 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.