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A Multiscale Model for the Simulation of V.A.R. Ingot Solidification

Abstract : Since the quality of Vacuum Arc Remelted ingots is linked to their chemical homogeneity and metallurgical structure, a modeling study of the solidification during VAR has been undertaken. It is based on the solution of the coupled transient heat, momentum and solute transport equations during the remelting of a cylindrical ingot. Solidification mechanisms implemented in the model include a full coupling between energy and solute transport in the mushy zone, and accounting for nucleation and finite diffusion of solutes at the microscopic scale, in both solid and liquid phases. This modeling can be applied to actual multi-component alloys. In this paper, the macrosegregation in Zircaloy 4 ingots is investigated. To validate the model, one single melt of a homogeneous electrode has been specifically performed. The comparison between the predicted macrosegregation and the experimental results shows the importance of accounting for solutal convection to forecast properly the macrosegregation in remelted ingots.
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https://hal.univ-lorraine.fr/hal-01709473
Contributor : Miha Založnik <>
Submitted on : Thursday, February 15, 2018 - 8:49:07 AM
Last modification on : Thursday, February 25, 2021 - 11:04:56 AM

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  • HAL Id : hal-01709473, version 1

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Mathieu Revil-Baudard, Alain Jardy, Miha Založnik, Hervé Combeau, Faustine Leclerc, et al.. A Multiscale Model for the Simulation of V.A.R. Ingot Solidification. CFD Modeling and Simulation in Materials Processing, TMS Annual Meeting 2012, 2012, Warrendale (PA), USA, Unknown Region. pp.107--114. ⟨hal-01709473⟩

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