Microstructures and mechanical properties of extruded Mg-2Sn-xYb(x=0,0.1,0.5 at.%)sheets  

作　　者：Jing Jiang Guangli Bi Jiaan Liu ChunChun Ye Jianshe Lian Zhonghao Jiang 

机构地区：[1]Key Laboratory of Automobile Materials,College of Materials Science and Engineering,Jilin University,Nanling Campus,Changchun 130025,China [2]Lanzhou State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology,Lanzhou 730050,China

出　　处：《Journal of Magnesium and Alloys》2014年第3期257-264,共8页镁合金学报（英文）

基　　金：This work was financially supported by the National Natural Science Foundations of China(No.51371089,No.51301082 and No.51201068).

摘　　要：Microstructures and mechanical properties of extruded Mg-2Sn-xYb(x=0,0.1,0.5 at.%)sheets were investigated.The grain size of as-cast Mg-2Sn alloy is significantly reduced with increasing Yb concentration.In addition toα-Mg and Mg_(2)Sn phase,some fine Mg_(2)(Sn,Yb)particles are observed in as-cast Mg-2Sn-0.5Yb alloy,but these fine particles are not observed in as-cast Mg-2Sn-0.1Yb alloy due to a high solubility of Yb in Mg matrix.Tensile tests demonstrated that extruded Mg-2Sn-0.5Yb sheet exhibited the highest tensile strength and available elongation to failure at room temperature,while extruded Mg-2Sn-0.1Yb alloy exhibited the highest tensile properties at 100°C and 200°C.The difference in the tensile properties of extruded sheets mainly arises from the different strengthening roles of grain refinement,solid solution strengthening and precipitation strengthening of particles.

关 键 词：Mg-Sn-Yb sheet Microstructures Rare earth Mechanical properties Elevated temperature 

分 类 号：TG1[金属学及工艺—金属学]