摘要
用X-ray衍射分析、扫描电子显微镜和透射电子显微镜(TEM)研究了铸态Mg-Zn-Y合金的显微组织.实验结果表明:铸态Mg-Zn-Y合金的显微组织主要由粗大的α-Mg和少量枝晶处的共晶产物构成.实验中发现,铸态组织中的α-Mg晶粒内有一种近平行四边形的颗粒状合金相沉淀析出.通过电子衍射分析确定出该合金相具有面心正交结构,与镁基体间存在着一定的取向关系.求出了该合金相的晶格参数以及α-Mg基体与该合金相的转换矩阵,根据取向关系做出镁基体和该合金相的极射投影图.
Microstructure of as-cast Mg-Zn-Y alloy are studied by using X-ray, SEM and TEM. The resuk indicates that microstructure of as-cast Mg-Zn-Y alloy are mainly composed of coarse α-Mg and a few eutectic products which in the dendrite region. It is found that a kind of alloy phase with a similar parallelogram form precipitated in the α-Mg grain. By electron diffraction analysis, it is identified that the alloy phase has a face center orthogonal structure and there are some orientation relationship between the Mg matrix and the alloy phase. The lattice parameters of the alloy phase and the transformation matrix between Mg matrix and the alloy phase are calculated, the pole figure is drawn according to the orientation relationship.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第1期45-48,共4页
Journal of Chongqing University
基金
国家高科技研究发展计划(863计划)资助项目(2001AA331050)
关键词
合金相
电子衍射
晶体学特征
取向关系
alloy phase
electron diffraction
crystallography
orientation relationship
