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Communication Dans Un Congrès Année : 2011

A numerical benchmark on the prediction of macrosegregation in binary alloys

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Michel Bellet

Résumé

During the solidification of metal alloys, chemical heterogeneities at the product scale (macrosegregation) develop. Numerical simulation tools are beginning to appear in the industry, however their predictive capabilities are still limited. We present a numerical benchmark exercise treating the performance of models in the prediction of macrosegregation. In a first stage we defined a "minimal" (i.e. maximally simplified) solidification model, describing the coupling of the solidification of a binary alloy and of the transport phenomena (heat, solute transport and fluid flow) that lead to macrosegregation in a fully columnar ingot with a fixed solid phase. This model is solved by four different numerical codes, employing different numerical methods (FVM and FEM) and various solution schemes. We compare the predictions of the evolution of macrosegregation in a small (10 x 6 cm) ingot of Sn-10wt%Pb alloys. Further, we present the sensitivities concerning the prediction of instabilities leading to banded channel mesosegregations
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Dates et versions

hal-00613930 , version 1 (08-08-2011)

Identifiants

  • HAL Id : hal-00613930 , version 1

Citer

Hervé Combeau, Michel Bellet, Yves Fautrelle, Dominique Gobin, Eric Arquis, et al.. A numerical benchmark on the prediction of macrosegregation in binary alloys. TMS 2011 - 140th Annual Meeting and Exhibition, Feb 2011, San Diego, CA, United States. pp.755-762 - ISBN 9781118029466. ⟨hal-00613930⟩
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