Mechanical property and anisotropy of as-extruded Mg-Zn-Y-Mn alloys with different volume fraction of long-period stacking ordered(LPSO)phase  

作　　者：Dahui Liang Mincong Chen Chuanqiang Li Zhipei Tong Yong Dong Dong Bian 

机构地区：[1]School of Materials and Energy,Guangdong University of Technology,Guangzhou,510006,China [2]Medical Research Institute,Department of Orthopedics,Guangdong Provincial People's Hospital(Guangdong Academy of Medical Sciences),Southern Medical University,Guangzhou,510080,China

出　　处：《Journal of Rare Earths》2024年第12期2259-2269,I0003,共12页稀土学报（英文版）

基　　金：Project supported by Guangdong Basic and Applied Basic Research Foundation(2024A1515030065,2023A1515012299);Guangzhou Science and Technology Planning Project(2024A04J6299,202201011454);Young Talent Support Project of Guangzhou Association for Science and Technology(QT2024-012);the National Natural Science Foundation of China(52101283);National College Students Innovation and Entrepreneurship Training Program(xj2023118450625)。

摘　　要：Effects of different volume fraction of long-period stacking ordered(LPSO)phase on the microstructure,mechanical property and anisotropy of the as-extruded Mg-xZn-yY-0.1Mn(x=1 wt%,2 wt%,4 wt%and y=2 wt%,4 wt%,8 wt%)alloys were studied by an optical microscope,a scanning electron microscope,texture analysis,a transmission electron microscope and tensile testing.The results reveal that the volume fraction of LPSO phase increases from ZW12 to ZW24 to ZW48 alloys with the elevating Zn and Y content but constant Y/Zn value,and the mechanical strength of the LPSO-containing Mg-Zn-Y-Mn system is gradually improved when increasing LPSO phases.With the highest volume fraction of LPSO phase,ZW48 alloy presents the highest ultimate tensile strength(UTS)of 427 MPa along the extrusion direction(ED)when compared with those of ZW12 alloy with the UTS of 307 MPa and ZW24 alloy with the UTS of 347 MPa.Moreover,the elongation ratio of ZW48 alloy is maintained to moderate 9.9%,which is also the highest among three studied alloys.On the other hand,texture analysis demonstrates that the basal texture of the a-Mg phase in the ZW48 alloy is significantly weakened by the generation of more LPSO phases.On the contrary,a high texture intensity of a-Mg phase and obvious mechanical anisotropy can be observed for the ZW12 alloy.However,mechanical anisotropy still exists in the ZW48 alloy containing massive LPSO phases,which is attributed primarily to the zonal distribution of large LPSO along the ED.

关 键 词：Microstructure Mg-Zn-Y-Mn alloy LPSO phase Texture Mechanical anisotropy Rare earths 

分 类 号：TG146.22[一般工业技术—材料科学与工程]