Thermodynamic coupling in the computation of dendrite growth kinetics for multicomponent alloys
Résumé
The growth kinetics of a dendrite tip are of paramount importance for microstructure modeling in materials science and engineering. However, theories for multicomponent alloys are limited, primarily due to approximations in the relevant thermodynamic data. The present contribution first reports on a pragmatic implementation of a general framework coupled with thermodynamic equilibrium calculations. It is applied to the widely used IN718 nickel-base superalloy. Discussions on the output of the model are based on comparisons with the commonly found approximations for multicomponent alloys. Finally, the remaining issues to reach applications at high growth rates are given, paving the way for future developments.
Domaines
MatériauxOrigine | Fichiers produits par l'(les) auteur(s) |
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