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Effect of Mg2Sn Intermetallic on the Grain Refinement in As-cast AM Series Alloy

机译:Mg2Sn金属间化合物对铸态AM系列合金晶粒细化的影响

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In the present work, in order to investigate the grain refinement mechanism of AM containing Sn alloys, the as-cast AM60, AM90 alloys, and the alloys with addition of 1 wt.% Sn were fabricated by traditional casting, respectively. During the solidification of AM + Sn alloys, the morphology of divorced eutectic Mg17Al12 was refined by Mg2Sn intermetallic that served as the heterogeneous nucleation cores. The modified Mg17Al12 effectively restricted the grain growth and resulted in a grain refinement. As a result, the yield strength of as-cast AM alloys was significantly enhanced by addition of Sn, while the ductility also improved. Moreover, the edge-to-edge model was employed to predict the orientation relationship between Mg17Al12 and Mg2Sn.
机译:在目前的工作中,为了研究含AM的Sn合金的晶粒细化机理,分别通过传统的铸造方法分别制造了铸态的AM60,AM90合金和添加了1 wt%Sn的合金。在AM + Sn合金的凝固过程中,离析的共晶Mg17Al12的形貌被Mg2Sn金属间化合物作为异质形核核心。改性的Mg17Al12有效地限制了晶粒的生长并导致晶粒细化。结果,通过添加Sn,铸态AM合金的屈服强度显着提高,同时延展性也得到改善。此外,边缘到边缘模型被用来预测Mg17Al12和Mg2Sn之间的取向关系。

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