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以Mg-4%Zn-5%Al合金为研究对象,研究Sn含量变化对Mg合金物相、显微组织和拉伸性能的影响。采用XRD对样品进行物相的测定,并测试了不同Sn含量的样品的抗拉强度。结果表明,Sn的加入使Mg合金在晶界处生成共晶相,随着Sn含量增加,Mg合金抗拉强度和伸长率先增加后减小。当Sn含量为1.0%时,Mg合金抗拉强度达到最大值226.5 MPa,而未添加Sn时的Mg合金抗拉强度为189.2 MPa,此时Mg合金的伸长率为9.1%;当Sn含量继续增加时,Mg合金的抗拉强度和伸长率将下降。
The effect of Sn content on the phase, microstructure and tensile properties of Mg alloy was investigated with Mg-4% Zn-5% Al alloy. The phase of the sample was measured by XRD and the tensile strength of samples with different Sn contents was tested. The results show that the addition of Sn causes the eutectic phase of Mg alloy to form at the grain boundary. With the increase of Sn content, the tensile strength and elongation of Mg alloy first increase and then decrease. When the content of Sn is 1.0%, the tensile strength of Mg alloy reaches the maximum value of 226.5 MPa, while the tensile strength of Mg alloy without addition of Sn is 189.2 MPa, and the elongation of Mg alloy is 9.1%. When Sn content continues As it increases, the tensile strength and elongation of the Mg alloy will decrease.