Substitution of Ni for Zn on microstructure and mechanical properties of Mg-Gd-Y-Zn-Mn alloy  

作　　者：Rongqing Zhang Jingfeng Wang Song Huang Shijie Liu Fusheng Pan 

机构地区：[1]Chongqing Bashu Secondary School,Chongqing 400013,China [2]National Engineering Research Center for Magnesium Alloys,College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China

出　　处：《Journal of Magnesium and Alloys》2017年第3期355-361,共7页镁合金学报（英文）

基　　金：supported by the National Key Research and Development Program of China(No.2016YFB0301100);the Natural Science Foundation Commission of China(Grant No.51571044);Chongqing foundation and advanced research project(Grant No.cstc2015jcyjBX0081);the National Basic Research Program of China(Grant No.2013 CB632201)。

摘　　要：This study analyzes the effect of substitution of Ni for Zn on microstructure and mechanical properties of Mg-Gd-Y-Zn-Mn alloy.Our results show that the volume fraction of Mg5(Gd,Y)and(Mg,Zn)3RE phase decreased and LPSO phase increased with more substitution of Ni.After homogenization,onlyα-Mg and LPSO phase existed.In Mg-Gd-Y-Zn-Mn alloys,the LPSO phases mainly consisted of the 14H type.While in Mg-Gd-Y-Ni-Mn alloy,the LPSO phases consisted of the 18R type.In addition,compared with Mg-Gd-Y-Zn-Mn alloy,the mechanical properties of as-extruded Ni-substitution alloys were improved due to the better refinement of the size of grains and LPSO phases.The tensile strength in as-extruded Mg-Gd-Y-Ni-Mn alloy could reach up to 400 MPa with 18%of the elongation to failure.

关 键 词：Magnesium alloy SUBSTITUTION Microstructure Mechanical property LPSO phase 

分 类 号：TG1[金属学及工艺—金属学]