In:
Materialwissenschaft und Werkstofftechnik, Wiley, Vol. 55, No. 1 ( 2024-01), p. 53-61
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
0933-5137
,
1521-4052
DOI:
10.1002/mawe.202300167
Language:
English
Publisher:
Wiley
Publication Date:
2024
detail.hit.zdb_id:
200651-0
detail.hit.zdb_id:
2025930-X
detail.hit.zdb_id:
246726-4
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