EBSD探究脉冲电流作用对AZ31镁合金微观结构的影响  

Application of EBSD for discussion of effect of pulse current action times on the microstructure of AZ31 magnesium alloy

作　　者：邓江宁[1] 吴楠[2] 王新丽[1] Deng Jiangning;Wu Nan;Wang Xinli(Instrumental Analysis Center, Northeastern University, Shenyang 110089,China;Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang 110089,China)

机构地区：[1]东北大学分析测试中心,沈阳110819 [2]东北大学材料各向异性教育部重点实验室,沈阳110819

出　　处：《材料与冶金学报》2019年第1期75-78,共4页Journal of Materials and Metallurgy

基　　金：国家自然科学基金面上项目(No.51471047)

摘　　要：借助扫描电子显微镜中电子背散射衍射技术探究了脉冲电流作用次数对样品内部晶粒取向的影响,通过对不同样品微取向差分布的统计系统研究了脉冲电流作用次数对AZ31镁合金微观结构的影响.研究结果表明,脉冲电流作用过程中晶粒发生转动,尤其随作用次数增加,晶粒尺寸分布变得更加均匀.晶粒取向差图分析可知,脉冲电流作用后随作用次数的增加,样品中大角度取向差的晶粒增多,同时伴随着拉伸孪晶增多.Electron backscattered diffraction(EBSD)was used to study the effect of pulse current action times on grain orientations.By analyzing the distribution of misorientation angles obtained from EBSD,the effect of pulse current action times on the microstructure of AZ31 magnesium alloy was discussed.The results showed that due to the electric current pulse,the grains rotated and with increase of the action times,the grain size became more uniform.With increase of the large angle misorientation,amount of tensile twins were apparent in the grains.

关 键 词：EBSD 脉冲电流 AZ31镁合金 

分 类 号：TG142.1[一般工业技术—材料科学与工程]