Precipitation modification in cast Mg-1Nd-1Ce-Zr alloy by Zn addition  

作　　者：Yiyuan Zhou Penghuai Fu Liming Peng Dan Wang Yingxin Wang Bin Hu Ming Liu Anil K.Sachdev Wenjiang Ding 

机构地区：[1]National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite,Shanghai Jiao Tong University,Shanghai 200240,PR China [2]Shanghai Light Alloy Net Forming National Engineering Research Center Co.,Ltd,Shanghai 201615,PR China [3]General Motors China Science Laboratory,Shanghai 201206,PR China [4]General Motors Research&Development Center,Warren,MI 48090,USA

出　　处：《Journal of Magnesium and Alloys》2019年第1期113-123,共11页镁合金学报（英文）

基　　金：This work was supported by National Key Research and Development Program of China(2016YFB0301000&2016YFB0701204);Shanghai Rising-Star Program(15QB1402700);National Natural Science Foundation of China(NSFC)(51671128&51771113);Special Fund of Jiangsu Province for the Transformation of Scientific and Technological Achievements(BA2016039).

摘　　要：The effects of different Zn addition(0,0.2,0.5,1.0 wt%)on the microstructure and mechanical properties of cast Mg-1Nd-1Ce-Zr alloy in as-cast,solution-treated and 200℃peak-aged conditions were studied.Precipitates in cast Mg-1Nd-1Ce-Zr alloy are significantly modified by the Zn addition.In the Zn-free alloy,the disk-shaped prismatic precipitates and the point-like precipitates are the main strengthening phases.When 0.2 Zn is added,the disk-shaped precipitates are refined and very fine basal precipitates form additionally.When 0.5 Zn is added,the basal precipitates become the main strengthening phase.Further increasing the Zn addition to 1.0%,only spare basal precipitates and point-like precipitates exist.The 0.5 Zn addition alloy has the highest strength at room temperature,whose yield strength,ultimate tensile strength and elongation in T6 condition are 136 MPa,237 MPa and 9%,respectively.

关 键 词：Mg alloy Precipitate Rare earth Zn addition Mechanical properties Mg wheel 

分 类 号：TG1[金属学及工艺—金属学]