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

Journal of Magnesium and Alloys

Jiaan Liu¹  Jianshe Lian¹  ChunChun Ye¹  Zhonghao Jiang¹  Jing Jiang¹  Guangli Bi² 

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

关键词: Mg–Sn–Yb sheet;    Microstructures;    Rare earth;    Mechanical properties;    Elevated temperature;   

DOI  :  10.1016/j.jma.2014.09.004

来源: DOAJ

【 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 to α-Mg and Mg2Sn phase, some fine Mg2(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.

【 授权许可】

Unknown