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Effect of Sc on the Ageing and Microstructure of an Al-Cu-Mg Alloy

机译:Sc对Al-Cu-Mg合金时效和组织的影响

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摘要

We have studied the effect on the ageing behaviour of 0.2 wt.% addition of Sc to a basernAl-2.5Cu-1.5Mg alloy. The hardening response was augmented such that peak hardnessrnwas increased ~ 12%. The decomposition was haracterized using transmission electronrnmicroscopy and simulated using a Monte Carlo calculation. The addition of Sc refines therndispersion of GPB zones and the simulation results reveal a strong tendency for Sc torncluster with vacancies and Mg atoms. These results are discussed in terms of the rapidrninitial hardening observed in these alloys and support the cluster hardening proposal.
机译:我们已经研究了在基础的Al-2.5Cu-1.5Mg合金中添加0.2 wt。%的Sc对时效行为的影响。增强了硬化反应,使峰值硬度增加了约12%。使用透射电子显微镜对分解进行处理,并使用蒙特卡洛计算进行模拟。 Sc的加入改善了GPB区域的热分散性,模拟结果表明,具有空位和Mg原子的Sc聚簇的趋势很明显。根据在这些合金中观察到的快速初始硬化讨论了这些结果,并支持了团簇硬化建议。

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