稀土元素Y对Mg合金组织和力学性能的影响

Effect of Rare Earth Y Content on Microstructure and Mechanical Property of Mg Alloy

研究了稀土元素Y对Mg合金组织和力学性能的影响。结果表明,在合金中添加元素Y之后,合金中呈现出树枝状晶粒且晶粒尺寸变小;Y和Zn元素存在着共聚偏析现象。随Y含量增加,镁合金的抗拉强度增大,而伸长率不断减小。当稀土元素Y含量为1.0%,Mg合金的抗拉强度最低,为265.3 MPa,此时Mg合金的伸长率最高,为20.6%。

The effects of rare earth Y element on the microstructure and mechanical properties of Mg-Zn alloy were studied. The results show that by the addition of Y into alloy, dendritic grain appears in the Mg alloy and the size of the grain is smaller. There is also co-segregation for Y and Zn element. The tensile strength of Mg alloy increases while the elongation decreases with the increase of Y. When Y content is 1.0%, the tensile strength of Mg alloy reaches the minimum value of 265.3 MPa, while the elongation reaches the maximum value of 20.6%.