Simulation of shrinkage-induced macrosegregation in a multicomponent alloy during reduced-gravity solidification

Abstract : Segregation is a key phenomenon responsible for altering alloys' properties during solidi-fication. The factors that lead to solute partitioning at the scale of the solidified parts are related to movements of liquid and solid phases. However, when considering a reduced gravitational field, convection forces become less significant compared to other factors. Consequently, predicting segregation in this context requires considering other prevailing driving forces, namely solidification shrinkage that arises from the density difference be-tween the liquid and solid phases. We propose a numerical model that accounts for energy conservation via a thermodynamic database, together with fluid momentum conserva-tion and species conservation to predict segregation driven by solidification shrinkage in a multicomponent alloy. We apply it on a specific steel grade for which reduced-gravity experiments were performed via parabolic flights.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01422070
Contributeur : Magalie Prudon <>
Soumis le : vendredi 23 décembre 2016 - 16:00:44
Dernière modification le : lundi 12 novembre 2018 - 10:54:47

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Saad Ali, Charles-André Gandin, Michel Bellet, Thomas Volkmann, Dieter M. Herlach. Simulation of shrinkage-induced macrosegregation in a multicomponent alloy during reduced-gravity solidification. 145th Annual Meeting and Exhibition, TMS 2016, Feb 2016, Nashville, United States. 35-42 - Chapter 5, ⟨10.1002/9781119274896.ch5⟩. ⟨hal-01422070⟩

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