Microstructure and Mechanical Properties of Mg-3Al-1Zn-xRE Alloys  

作　　者：Wei Qiu Enhou Han Lu Liu 

机构地区：[1]Environmental Corrosion Center, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China [2]Shenyang National Laboratory for Material Science, Institute of Metal Research,Chinese Academy of Sciences, Shenyang 110016, China

出　　处：《Journal of Materials Science & Technology》2009年第3期356-360,共5页材料科学技术（英文版）

基　　金：supported by the National Natural Science Fundation of China (NSFC) under grant Nos.50431020;National Basic Research Program of China(973 Program) project under grant No.2007CB613704

摘　　要：In this work, the influence of element RE on the microstructures and mechanical properties of the hot extuded Mg-3Al-1Zn-xRE alloys （with element RE content of 0.05, 0.1 and 0.2 wt pct） has been investigated and compared. It was found that RE can bring about precipitations phase that is identified as Al11RE3 by X-ray diffraction and transmission electron microscopy （TEM）. The grain sizes would not be refined after adding RE element. Al11RE3 phase would increase strength and decrease the ductility. The addition of RE element affects dynamic recrystallized process and even reorientation of recrystallized grains. The results showed that the mechanical properties of AZ31＋RE alloy are affected by combination of Al atoms, Mn atoms, Al11RE3 phase and grains orientation. It is important to consider the ratio of RE/Al when designing new Mg-Al-RE alloys.In this work, the influence of element RE on the microstructures and mechanical properties of the hot extuded Mg-3Al-1Zn-xRE alloys （with element RE content of 0.05, 0.1 and 0.2 wt pct） has been investigated and compared. It was found that RE can bring about precipitations phase that is identified as Al11RE3 by X-ray diffraction and transmission electron microscopy （TEM）. The grain sizes would not be refined after adding RE element. Al11RE3 phase would increase strength and decrease the ductility. The addition of RE element affects dynamic recrystallized process and even reorientation of recrystallized grains. The results showed that the mechanical properties of AZ31＋RE alloy are affected by combination of Al atoms, Mn atoms, Al11RE3 phase and grains orientation. It is important to consider the ratio of RE/Al when designing new Mg-Al-RE alloys.

关 键 词：Mg alloy RE elements EXTRUSION Mechanical properties 

分 类 号：TB383[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]