论文部分内容阅读
以含有I-Mg3YZn6准晶相的Mg-3.0Zn-0.6Y-0.6Zr合金(以下简称ZWK3合金)为基体,通过加入一定量的Nd,使用扫描电镜、X射线衍射、拉伸和动态热机械分析等手段,研究了Nd对准晶增强ZWK3合金组织和性能的影响。结果表明,Nd的加入使合金中的共晶组织含量增加,且随着Nd含量增大,共晶组织由层片状转变为离异共晶,但无准晶相生成;加入Nd后的合金抗拉强度和伸长率都随着Nd含量的增加而增大,但力学性能整体上略低于基体合金;加入Nd后合金的阻尼性能有一定提升,其阻尼行为可由G-L位错模型来解释。
The Mg-3.0Zn-0.6Y-0.6Zr alloy containing I-Mg3YZn6 quasicrystalline phase (hereinafter referred to as ZWK3 alloy) was prepared by adding a certain amount of Nd, using scanning electron microscopy, X-ray diffraction, tensile and dynamic thermal mechanical Analysis and other means to study the impact of Nd on the crystal structure and properties of ZWK3 alloy. The results show that the addition of Nd increases the content of eutectic in the alloy. With the increase of Nd content, the eutectic structure changes from lamellar to dissociative eutectic, but no quasicrystalline phase is formed. Both the tensile strength and the elongation increase with the increase of Nd content, but the mechanical properties are slightly lower than that of the matrix alloy. The damping properties of the alloys increase with the addition of Nd, and the damping behavior can be explained by the GL dislocation model.