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中文摘要：
当演员组微观结构和 Mg-5Zn-5Sn 的机械性质上的 Ca 增加的效果(集体部分， %) 合金被调查。结果显示那 0.5%-1.5%( 集体部分) 的增加 Ca 到 Mg-5Zn-5Sn 合金不仅精制合金的当演员组微观结构而且与高热的稳定性引起主要或最容易溶解的 CaMgSn 阶段的形成；从 0.5% ～ 1.5% 的 Ca 数量(集体部分) 的增加增加 CaMgSn 阶段的数量和尺寸。另外， Mg-5Zn-5Sn 合金的 Ca 增加在房间温度和 150 ?改进张力的性质不仅??六?????????????剔????????吠???????????????吗???传？？
英文摘要：
The effects of Ca addition on the as-cast microstructure and mechanical properties of the Mg-5Zn-5Sn （mass fraction,%） alloy were investigated.The results indicate that an addition of 0.5%-1.5% （mass fraction） Ca to the Mg-5Zn-5Sn alloy not only refines the as-cast microstructure of the alloy but also causes the formation of the primary and/or eutectic CaMgSn phases with high thermal stability;an increase in Ca amount from 0.5% to 1.5% （mass fraction） increases the amount and size of the CaMgSn phase.In addition,Ca addition to the Mg-5Zn-5Sn alloy improves not only the tensile properties at room temperature and 150 ℃ but also the creep properties.Among the Ca-containing Mg-5Zn-5Sn alloys,the one added 0.5% （mass fraction） Ca obtains the optimum ultimate tensile strength and elongation at room temperature and 150 ℃,however,the alloy added 1.5% （mass fraction） Ca exhibits the optimum yield strength and creep properties.
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