Microtexture evolution via deformation twinning and slip during compression of magnesium alloy AZ31
Microtexture evolution via deformation twinning and slip during compression of magnesium alloy AZ31
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DOI：
10.1016/j.msea.2006.07.175
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发表时间：
2008-06
期刊：
影响因子：
6.4
通讯作者：
J. Jiang;A. Godfrey;Wei Liu;Q. Liu
中科院分区：
文献类型：
--
作者：
J. Jiang;A. Godfrey;Wei Liu;Q. Liu
研究了 AZ31 镁合金在室温和 150°C 压缩测试期间的孪生和滑移系统活动。从卷材上切下的样品被压缩，压缩轴与片材法线方向成不同的角度。扫描电子显微镜中的电子背散射衍射技术用于研究局部织构和微观结构演化。镁的塑性变形受变形过程中的{101´2}<101´1>孪晶和滑移控制。当样品垂直于基面法线 (BPN) 加载时，会发生广泛的孪晶。与 BPN 平行加载的样品观察到高加工硬化率，几乎没有孪晶。应力-应变曲线的主要特征可以根据微观结构和纹理数据来解释。
The twinning and slip system activities during compression testing at room temperature and 150°C have been investigated for an AZ31 magnesium alloy. The samples, which were cut from a rolled sheet, were compressed with the compression axis taken at different angles to the sheet normal direction. The electron backscatter diffraction technique in the scanning electron microscope was used to investigate the local texture and microstructure evolution. The plastic deformation of magnesium is controlled by both {101¯2}〈101¯1〉 twinning and slip during deformation. Extensive twinning takes place when the sample is loaded perpendicular to the basal plane normals (BPNs). A high work-hardening rate, with very little twinning, is observed for samples loaded parallel to the BPNs. The main features of the stress–strain curves can be explained based on the microstructural and texture data.