【摘要】 采用光学金相显微镜、扫描电子显微镜、能谱仪、XRD等对Mg-Sr-Y中间合金、AZ31-0.5%Sr和AZ31-0.5%Sr-1.5%Y的组织、相结构进行研究。结果表明,Mg-Sr-Y中间合金的组织由基体α-Mg相、沿晶界分布的枝晶状的共晶组织(Mg17Sr2+Mg11Y)组成,Sr、Y可以细化AZ31镁合金晶粒,其细化效果与Sr、Y含量有关。更多还原

【Abstract】 In this paper,OM,SEM and EDS were used to research the as-cast structures and phase of Mg-Sr-Y master alloy,AZ31-0.6%Sr alloy and AZ31-0.5%Sr-1.5%Y alloy.The results indicate that the structure of Mg-Sr-Y master alloy are comprised of α-Mg phase and dendritic eutectic(Mg17Sr2+Mg11Y)along the grain boundary.The effect of Mg-Sr-Y master alloy on AZ31 alloy depends on the amount of Sr and Y.更多还原