Influence of cooling path on solidification morphology and hot tearing susceptibility of an Al−Cu−Fe−Mg−Si alloy

被引：0
|
作者：
Zhou, B. [1 ]
Apel, M. [1 ]
Eiken, J. [1 ]
Berger, R. [1 ]
Gor, S. [2 ]
Wolff, N. [2 ]
机构：
[1] Access e. V., Intzestraße 5, Aachen,52072, Germany
[2] RWTH Aachen University, Foundry Institute, Intzestraße 5, Aachen,52072, Germany
来源：
Materialwissenschaft und Werkstofftechnik | 2024年 / 55卷 / 01期
关键词：
In this work; a numerical approach is applied to study the impact of local cooling conditions on the hot tearing in an aluminium-copper alloy with iron; magnesium and silicon as impurities. At first; CALPHAD-coupled multicomponent and multiphase-field simulations were performed to elucidate the effect of cooling conditions on solidification morphology in the final; critical stage of solidification. Then; the evolution of the melt flow permeability is derived from the simulated three-dimensional microstructures and discussed in the context of the Rappaz-Drezet-Gremaud criterion for hot tearing susceptibility. With increasing cooling rates; the microstructure becomes finer and the resulting permeability first increases and then saturates within the investigated range. It is shown that the Rappaz-Drezet-Gremaud hot-tearing criterion in combination with microstructure simulations responds to different cooling conditions in contrast to a Scheil-Gulliver based model or an evaluation of the average Kou-index. © 2024 Wiley-VCH GmbH;
D O I：
10.1002/mawe.202300167
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学科分类号：
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页码：53 / 61
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