Warm deformation behavior of hot-rolled AZ31 Mg alloy
Warm deformation behavior of hot-rolled AZ31 Mg alloy
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DOI：
10.1016/j.msea.2004.09.039
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发表时间：
2005-02
期刊：
影响因子：
6.4
通讯作者：
D. Yin;Kezhao Zhang;G. Wang;W. Han
中科院分区：
文献类型：
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作者：
D. Yin;Kezhao Zhang;G. Wang;W. Han
采用单向拉伸试验研究了热轧AZ 31镁合金在50-200°C温度范围内、应变速率为1.4×10−3s−1 ~ 1.4×10− 1 s −1范围内的温变形性能。利用光学显微镜（OM）和透射电子显微镜（TEM）观察了温变形过程中的动态再结晶（DRX）和孪生。结果表明，在低温和初始变形阶段，以不同取向的孪晶相互交叉的复合方式为特征的孪晶是主要的变形机制。孪晶积累的畸变能量是DRX发生的原因。
Uniaxial tensile test was employed to evaluate the warm deformation properties of hot-rolled AZ31 Mg alloy at a temperature range of 50–200°C and a strain rate range of 1.4×10−3s−1–1.4×10−1s−1. The dynamic recrystallization (DRX) and twinning during the warm deformation were observed by optical microscopy (OM) and transmission electronic microscopy (TEM). It is shown that twinning characterized by a compound mode with differently oriented twins intersecting each other is the dominant deformation mechanism at low temperatures and initial deformation stage. The distortion energy accumulated by twinning is the reason for the occurrence of DRX.