Effect of Heat-treatment on the Microstructures and Mechanical Properties of Mg-10Zn-5Al-0.1Sb-xCu Magnesium Alloy  

作　　者：游志勇 ZHANG Yuhua CHENG Weili ZHANG Jinshan WEI Yinghui 

机构地区：[1]College of Materials Science and Engineering, Taiyuan University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第4期834-839,共6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.51044007,51001079,50571073);the National Natural Science Foundation of Shanxi Province(2009011028-3);the Research Fund for the Dectoral Program of Higher Education of China(20111402110004)

摘　　要：The effects of the solution and aging treatment on microstructures and mechanical properties of the Mg-10Zn-5A1-0.1Sb-XCu cast magnesium alloys were investigated by brinell hardness measurement, scanning electron microscopy （SEM）, energy spectrum analyzing apparatus and X-ray diffraction （XRD）. The experimental results show that the strip-like t-Mg32 （A1, Zn）49 phase is shown at the grain boundaries and Mg2Cu phase become smaller, even granular after solution treatment at 350 ~C for 24 h. By ageing treatment at 180 ~C, the ternary strengthening phase （r phase） precipitates gradually at or around grain boundary. With increasing aging time, the micro-hardness improves obviously and up to the maximum （105.9 HV） at aging time of 36 h. In addition, the tensile-strengths at room temperature and at an elevated temperature respectively reach 228 MPa and 176 MPa, which is increased by 20% and 10%, respectively.The effects of the solution and aging treatment on microstructures and mechanical properties of the Mg-10Zn-5A1-0.1Sb-XCu cast magnesium alloys were investigated by brinell hardness measurement, scanning electron microscopy （SEM）, energy spectrum analyzing apparatus and X-ray diffraction （XRD）. The experimental results show that the strip-like t-Mg32 （A1, Zn）49 phase is shown at the grain boundaries and Mg2Cu phase become smaller, even granular after solution treatment at 350 ~C for 24 h. By ageing treatment at 180 ~C, the ternary strengthening phase （r phase） precipitates gradually at or around grain boundary. With increasing aging time, the micro-hardness improves obviously and up to the maximum （105.9 HV） at aging time of 36 h. In addition, the tensile-strengths at room temperature and at an elevated temperature respectively reach 228 MPa and 176 MPa, which is increased by 20% and 10%, respectively.

关 键 词：solution and aging magnesium alloy MICROSTRUCTURE mechanical property 

分 类 号：TG166.4[金属学及工艺—热处理]