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3D CAFE modeling of grain structures: Application to primary dendritic and secondary eutectic solidification

Abstract : A three-dimensional model is presented for the prediction of grain structures formed in casting. It is based on direct tracking of grain boundaries using a cellular automaton (CA) method. The model is fully coupled with a solution of the heat flow computed with a finite element (FE) method. Several unique capabilities are implemented including (i) the possibility to track the development of several types of grain structures, e.g. dendritic and eutectic grains, (ii) a coupling scheme that permits iterations between the FE method and the CA method, and (iii) tabulated enthalpy curves for the solid and liquid phases that offer the possibility to work with multicomponent alloys. The present CAFE model is also fully parallelized and runs on a cluster of computers. Demonstration is provided by direct comparison between simulated and recorded cooling curves for a directionally solidified aluminum-7 wt% silicon alloy.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00657733
Contributeur : Magalie Prudon <>
Soumis le : lundi 9 janvier 2012 - 10:35:04
Dernière modification le : jeudi 24 septembre 2020 - 17:22:54

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Tommy Carozzani, Hugues Digonnet, Charles-André Gandin. 3D CAFE modeling of grain structures: Application to primary dendritic and secondary eutectic solidification. Modelling and Simulation in Materials Science and Engineering, IOP Publishing, 2012, 20 (1), Article number 015010 - 19 p. ⟨10.1088/0965-0393/20/1/015010⟩. ⟨hal-00657733⟩

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