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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 effect of rare earth element Y on the microstructure and mechanical properties of Mg alloy was studied. The results show that dendritic grains appear in the alloy and the grain size decreases when the element Y is added to the alloy. The segregation of Y and Zn elements exists. With the increase of Y content, the tensile strength of magnesium alloy increases, while the elongation decreases. When the content of rare earth element Y is 1.0%, the tensile strength of Mg alloy is the lowest, which is 265.3 MPa. At this time, the elongation of Mg alloy is the highest, which is 20.6%.