Mg-Gd-Y(Zr)合金时效析出相分析  

Analysis on precipitated phases in Mg-Gd-Y(Zr) alloy subjected to aging treatment

作　　者：郭全英[1] 孙晶[1] 毛萍莉[1] 刘正[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《沈阳工业大学学报》2013年第5期530-534,共5页Journal of Shenyang University of Technology

基　　金：十二五国家科技支撑计划项目(2011BAE22B06)

摘　　要：为了确定Mg-Gd-Y(Zr)合金时效析出相的形态和物相组成,分别在150、200、250和300℃对挤压态Mg-13Gd-4Y-0.4Zr合金进行不同时间的时效处理.采用x-射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和能谱分析(EDS)等技术检测并分析了不同温度时效后的析出相形态和物相组成,用扩散理论分析了时效温度对析出相的影响.结果表明,合金经不同温度时效后析出相是白色块状的Mg2(Gd,Y)、Mg3(Gd,Y)和片状的Mg5(Gd,Y).分析认为,时效温度决定了Mg-Gd-Y(Zr)合金时效析出相的形态.To determine the morphology and constitute of precipitated phases in Mg-Gd-Y （Zr） alloy subjected to aging treatment, the aging treatment at 150℃, 200℃, 250℃ and 300℃ with different time was performed for as-extruded Mg-13Gd-4Y-0. 4Zr alloy. The morphology and constitute of precipitated phases in the experimental alloy subjected to aging treatment at different temperatures were characterized with x-ray diffractometer （XRD）, scanning electron microscope （SEM）, transmission electron microscope （TEM） and energy dispersive spectroscopy （EDS）. The effect of aging temperature on the precipitated phases was analyzed with the diffusion theory. The results show that the precipitated phases in the alloy subjected to aging treatment at different temperatures are Mg2 （Gd, Y） and Mg3 （Gd, Y） phases with block shape and Mg5 （Gd, Y） phase with lameUar shape. The analysis indicates that the aging temperature determinates the morphology of precipitated phases in Mg-Gd-Y（Zr） alloy subjected to aging treatment.

关 键 词：Mg-13Gd-4Y-0 4Zr合金 时效处理 析出相 形貌 时效温度 物相组成 硬度 显微组织 

分 类 号：TG113.1[金属学及工艺—物理冶金]