材料科学
微观结构
体积分数
极限抗拉强度
合金
延伸率
相(物质)
打滑(空气动力学)
冶金
粒度
应变硬化指数
复合材料
硬化(计算)
变形(气象学)
可塑性
热力学
化学
有机化学
物理
图层(电子)
作者
Fei Zhong,Shun Zhang,Ruizhi Wu,Huajie Wu,Xiaochun Ma,Linrui Hou,Jinghuai Zhang
标识
DOI:10.1002/adem.202201716
摘要
The effects of rolling reductions on microstructure evolution and mechanical properties of as‐rolled Mg – 8Li – 1Al – 0.6Y – 0.6Ce alloys are studied. When the thickness reduction increases from 30% to 90%, α‐Mg phase is elongated along the rolling direction, and the aspect ratio of fiber structure increases. At the same time, the volume fraction of β‐Li phase increases, because part of α‐Mg phase transforms into β‐Li phase. When the rolling reduction is 70%, the alloy shows the best comprehensive performance with the ultimate tensile strength (UTS) of 238 MPa and the elongation of 24%, mainly caused by fine‐grain strengthening and strain hardening. During the rolling process, β‐Li phase is deformed preferentially and subsequently drives the deformation of α‐Mg phase. Then some twins are generated, which promote the dislocation slip, thereby promoting the deformation coordination.
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