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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Solidification behaviour and the effects of homogenisation on the structure of an Al-Cu-Mg-Ag-Sc alloy
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Solidification behaviour and the effects of homogenisation on the structure of an Al-Cu-Mg-Ag-Sc alloy

机译：凝固行为及均质对Al-Cu-Mg-Ag-Sc合金组织的影响

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摘要

The solidification behaviour and structural evolution during homogenisation annealing of a 0.17 mass% Sc and 0.1 mass% Ge modified Al-Cu-Mg-Ag alloy was examined. The formation of the primary Mg_2Ge phase and the Sc-enriched phase (Al_2Cu) was found to occur under solidification; no evidence for the formation of the ternary W-phase (Al_(8-x)Cu_(4+x)Sc) was observed. Approximately 70% of the overall Sc content is fixed in the supersaturated solid solution. However, only two thirds of this Sc is consumed by the formation of a dispersion of nanoscale Al_3Sc particles within the Al matrix under homogenisation annealing. A third of the Sc is consumed by the formation of the W-phase because of Sc diffusion into the primary 8-phase, which leads to its transformation into the W-phase.
机译：检查了0.17质量％的Sc和0.1质量％的Ge改性的Al-Cu-Mg-Ag合金的均质退火过程中的凝固行为和组织演变。发现在凝固过程中发生了初生Mg_2Ge相和富Sc相（Al_2Cu）的形成。没有观察到形成三元W相（Al_（8-x）Cu_（4 + x）Sc）的证据。总的Sc含量的大约70％固定在过饱和固溶体中。然而，通过在均质退火下在Al基体内形成纳米级Al_3Sc颗粒的分散体，仅消耗了该Sc的三分之二。由于Sc扩散到初级8相中，导致W形成，消耗了三分之一的Sc，这导致Sc转变为W相。

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