Grain-refinement strengthening effect of Y and Sm on magnesium alloy AZ81

International Conference on Manufacturing Technology, Materials and Chemical Engineering

材料科学;化学工业

Zhang, Qing^1^2 ; Wang, Ying^3 ; Li, Ping^3

School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang

471023, China^1

Henan Province Collaborative Innovation Center of Nonferrous Metals, Luoyang

471023, China^2

School of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang

471023, China^3

关键词: Grain refinement mechanism;    Grain refinement strengthening;    Grain size;    Heterogeneous nucleation;    High melting point;    Mg matrix;    Microstructure analysis;    Sm addition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/592/1/012027/pdf
DOI  :  10.1088/1757-899X/592/1/012027

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The grain refinement mechanism and resulting grain-refinement strengthening effect of rare earth elements Y and Sm on magnesium alloy AZ81 have been investigated by means of microstructure analysis, tensile tests and theoretic calculation. The results show that the formation of high melting-point Al2Y and Al2Sm phases is observed in magnesium alloy AZ81 after 1.8 wt% Y and Sm addition. The phases act as the heterogeneous nucleation cores of α-Mg matrix, and refine the grain size. It leads to the effective grain-refinement strengthening and enhance the strength of the alloy.