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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure and Mechanical Properties of a Ag Micro-Alloyed Mg-5Sn Alloy
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Microstructure and Mechanical Properties of a Ag Micro-Alloyed Mg-5Sn Alloy

机译：Ag微合金Mg-5Sn合金的微观结构和力学性能

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摘要

Effects of 1.5 wt.% Ag addition and solid solution + artificial ageing at 160 A degrees C on the microstructure and mechanical properties of a Mg-5Sn alloy have been studied. The results show that Ag addition has significantly hardened the solution-treated Mg-5Sn alloy. During the ageing process, the hardness increase rate and the strength and ductility of the Mg-5Sn alloy at each state are also improved by Ag addition. The improved strengthening behavior is primarily attributed to the refinement distribution of the Mg2Sn precipitates, the enhanced precipitation process, and the synergistic strengthening effect of Mg2Sn and a metastable plate DO19 phase formed at lower ageing temperature. For each solution-treated alloy, the strength and ductility are higher than the corresponding cast ones. Ageing further enhances the yield strength, and the ductility of the Mg-5Sn-1.5Ag alloy is also increased after ageing. The fracture surfaces of the both peak-aged alloys exhibit the characteristic of a mixture of quasi-cleavage and ductile fracture.
机译：研究了1.5重量％的效果。[50°C对Mg-5Sn合金的微观结构和机械性能下的160℃下的效果+人工老化。结果表明，Ag加入显着硬化了溶液处理的Mg-5Sn合金。在老化过程中，通过Ag加入，还改善了每个状态下Mg-5sn合金的硬度增加率和强度和延展性。改进的强化行为主要归因于Mg2SN沉淀物的细化分布，增强的沉淀过程和Mg2Sn的协同强化作用和在较低老化温度下形成的亚稳态板Do19相。对于每种溶液处理的合金，强度和延展性高于相应的铸造的合金。老化进一步增强屈服强度，老化后Mg-5Sn-1.5Ag合金的延展性也增加。峰老化合金的断裂表面表现出准切割和延性骨折的混合物的特征。

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