Effect of homogenization treatment on microstructure evolution and the distributions of RE and Zr elements in various MgeLieREeZr alloys  

作　　者：Lei Bao Qichi Le Zhiqiang Zhang Jianzhong Cui Qinxue Li 

机构地区：[1]Key Lab of the Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,People’s Republic of China

出　　处：《Journal of Magnesium and Alloys》2013年第2期139-144,共6页镁合金学报（英文）

基　　金：This work was supported by the Major State Basic Research Development Program of China(No.2013CB632203);National Key Technology R&D Program of China(2011BAE22B03);(2012BAF09B01);National Natural Science Foundation of China(51074207);Chinese Postdoctoral Science Foundation(2012M520634);the Fundamental Research Foundation of Central Universities(Grant Nos.N120509002 and N120309003).

摘　　要：Mge3Lie0.4Zr alloys containing RE elements(Gd,La,Nd)(Mge3LieREe0.4Zr alloys)are investigated to reveal the influence of homogenization treatment on microstructures and distributions of RE,Zr elements.It is found that 300
C24 h homogenization treatment shows better improvement on the microstructure including the refinement of grain size,the dispersion of cellular dendrite and low melting point particles.Before treatment,La and Nd segregate effectively at grain boundary and Zr segregates in the form of precipitates.Homogenization treatment induces the reduction of RE segregation.However,the segregation of Zr in precipitates cannot be abated due to the relatively low diffusion rate compared with RE elements.

关 键 词：MgeLi based alloys RE elements Homogenization treatment Microstructure Micro segregation 

分 类 号：TG1[金属学及工艺—金属学]