Strength differential effect and anisotropy of Mg-1.9Mn-0.3Ce (wt-%) alloy subjected to high-rate loadings
Strength differential effect and anisotropy of Mg-1.9Mn-0.3Ce (wt-%) alloy subjected to high-rate loadings
复制标题
强度%20差异%20效应%20and%20各向异性%20of%20Mg-1.9Mn-0.3Ce%20(wt-%)%20合金%20受%20to%20高速率%20loadings
DOI：
10.1080/02670836.2021.1944525
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发表时间：
2021
影响因子：
1.8
通讯作者：
Li Ziran
中科院分区：
文献类型：
--
作者：
Wang Jin;Wang Yang;Li Ziran
Tension and compression tests for a rare-earth-containing alloy sheet, Mg–1.9Mn–0.3Ce (wt-%), are performed under quasi-static and high-rate loadings along the rolling, transverse and normal direction, and stress – strain responses exhibit positive strain-rate dependence. Empirically based Johnson-Cook constitutive model is modified to describe the rate-dependent plastic deformation in multiple loading directions. A strong strength differential effect persists, and such effect is shown to be stronger at high strain rates. A weak in-plane anisotropy exists in the initial yielding and subsequent strain hardening behaviour as well as strength differential effect. In contrast, the out-of-plane anisotropy in compression is apparent and is approximately rate insensitive. Microstructural observations indicate that twinning plays the key role for the enhancement of strain-hardening rate under high strain-rate deformation.
