Influence of Rare Earth(Ce and La) Addition on the Performance of Al-3.0 wt%Mg Alloy  

作　　者：张欣 王泽华 ZHOU Zehua XU Jianming 

机构地区：[1]College of Mechanics and Materials, Hohai University, Nanjing 210098, China [2]Zhangjiagang Hongji Aluminum Co. Ltd., Suzhou 215600, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2017年第3期611-618,共8页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51379070);the Fundamental Research Funds for the Central Universities(No.2017B40314)

摘　　要：The influences of rare earth elements（cerium and lanthanum） on the microstructure and phases of Al-3.0 wt%Mg alloys used for electromagnetic shielding wire were characterized by scanning electron microscopy（SEM）, energy-dispersive spectroscopy（EDS）, X-ray diffraction（XRD） and differential scanning calorimetry（DSC）. The mechanical properties and electrical resistivity were also investigated. The results indicated that a certain content of rare earth could improve the purification of the aluminum molten, enhance the strength, and reduce the electrical resistivity of Al-3.0 wt%Mg alloys. The strength reached the top value when RE content was 0.3 wt% while the alloy with 0.2 wt% RE addition had the smallest electrical resistivity. The elongation varied little when RE addition was no more than 0.2 wt%. But the excessive addition of rare earth would be harmful to the microstructure and properties of Al-3.0 wt%Mg alloys.The influences of rare earth elements（cerium and lanthanum） on the microstructure and phases of Al-3.0 wt%Mg alloys used for electromagnetic shielding wire were characterized by scanning electron microscopy（SEM）, energy-dispersive spectroscopy（EDS）, X-ray diffraction（XRD） and differential scanning calorimetry（DSC）. The mechanical properties and electrical resistivity were also investigated. The results indicated that a certain content of rare earth could improve the purification of the aluminum molten, enhance the strength, and reduce the electrical resistivity of Al-3.0 wt%Mg alloys. The strength reached the top value when RE content was 0.3 wt% while the alloy with 0.2 wt% RE addition had the smallest electrical resistivity. The elongation varied little when RE addition was no more than 0.2 wt%. But the excessive addition of rare earth would be harmful to the microstructure and properties of Al-3.0 wt%Mg alloys.

关 键 词：Al-3.0 wt%Mg alloy Ce and La additions microstructure mechanical property electrical resistivity 

分 类 号：TG146.21[一般工业技术—材料科学与工程] O614.33[金属学及工艺—金属材料]