镁和铝合金中原位形成的 Mg2Si 相的结构和力学行为——综述,RSC Advances

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镁和铝合金中原位形成的 Mg2Si 相的结构和力学行为——综述
RSC Advances ( IF 3.9 ) Pub Date : 2020-10-8 , DOI: 10.1039/d0ra02744h
Prem Prakash Seth ₁ , Om Parkash ₁ , Devendra Kumar ₁

Affiliation

在过去的二十年里，对轻质、高比强度合金的需求急剧增加。镁和铝合金是非常合适的候选材料。大约 30 年前开始对具有 Mg ₂ Si 相的合金的研究。_{目前的情况是，含有 Mg 2} Si 相的镁和铝合金在科学界非常流行，并广泛用于汽车和航空航天工业。镁₂Si 是一种非常稳定的相，表现出优异的机械、热、电化学和摩擦学性能。本文简要介绍了 Mg-Si 二元合金以及 Mg-Si-Al 和 Al-Si-Mg 合金。已经报道了含有 Mg 和 Si 的轻质合金的晶粒细化方法和机械性能。现有结果表明，硅与镁反应并形成化学计量式为 Mg ₂ Si 的金属间化合物。通过扩散或沉淀过程，在 Mg-Si、Mg-Si-Al 和 Al-Mg-Si 合金中原位形成 Mg _{2 Si 相。}原位发育的Mg ₂的形态和尺寸Si相取决于合成路线和贱金属或基体。在液态冶金过程中，沉淀顺序取决于冷却速度。Mg ₂ Si 相的形态取决于析出顺序，机械性能取决于合金基体中Mg _{2 Si 相的形态和尺寸。}

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Structure and mechanical behavior of in situ developed Mg2Si phase in magnesium and aluminum alloys – a review

The demand for lightweight, high specific strength alloys has drastically increased in the last two decades. Magnesium and aluminum alloys are very suitable candidate materials. Research on alloys with an Mg₂Si phase started about three decades ago. The current scenario is that magnesium and aluminum alloys containing an Mg₂Si phase are very popular in the scientific community and extensively used in the automotive and aerospace industries. Mg₂Si is a very stable phase and exhibits excellent mechanical, thermal, electrochemical and tribological properties. This paper presents a brief review of Mg–Si binary alloys, and Mg–Si–Al and Al–Si–Mg alloys. Grain refinement methods and mechanical properties have been reported on lightweight alloys containing Mg and Si. The available results show that silicon reacts with magnesium and forms an intermetallic compound with the stoichiometric formula Mg₂Si. There is in situ formation of an Mg₂Si phase in Mg–Si, Mg–Si–Al and Al–Mg–Si alloys by the diffusion or precipitation process. The morphology and size of an in situ developed Mg₂Si phase depend on the synthesis route and base metal or matrix. In the liquid metallurgy process the precipitation sequence depends on the cooling rate. The morphology of the Mg₂Si phase depends on the precipitation sequence and the mechanical properties depend on the morphology and size of the Mg₂Si phase within the alloy matrix.

更新日期：2020-10-08

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