Anisotropy of the residual strain in Mg-SiCp composites
Anisotropy of the residual strain in Mg-SiCp composites
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Mg-SiCp 复合材料中残余应变的各向异性
DOI：
10.1016/j.compscitech.2006.03.019
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发表时间：
2006
影响因子：
9.1
通讯作者：
G. Bruno
中科院分区：
文献类型：
--
作者：
G. Garcés;G. Bruno
纯镁基复合材料中的残余应变已通过中子衍射测定。在增强阶段，它们是静水压的，并且随着增强体体积分数的增加而增加。非强化合金和复合材料均呈现各向异性基体残余应变。它们对于晶粒来说是静水压和压缩的，其基极几乎垂直于挤压方向（“基本取向晶粒”），对于某些其他方向（“非基本晶粒”）是拉伸和偏向的。这可以通过将材料建模为三相复合材料来解释，其中“基本取向晶粒”和 SiC 颗粒都是硬相，其余的 Mg 晶粒是软相。
Residual strains have been determined by neutron diffraction in pure magnesium matrix composites. In the reinforcing phase, they are hydrostatic, compressive and increase with increasing reinforcement volume fraction. Both the unreinforced alloy and the composites present anisotropic matrix residual strains. They are hydrostatic and compressive for grain with their basal pole almost perpendicular to the extrusion direction (“basal oriented grains”) and tensile and deviatoric for some other orientations (“non-basal grains”). This can be explained modeling the material as a three-phase composite, where both the “basal oriented grains” and the SiC particles are hard phases and the rest of the Mg grains are the soft phase.