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Polydimensional modelling of dendritic growth and microsegregation in multicomponent alloys / Sebastian C. Michelic in Acta materialia, Vol. 58 N° 7 (Avril 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 7 (Avril 2010) . - pp. 2738–2751 Titre : Polydimensional modelling of dendritic growth and microsegregation in multicomponent alloys Type de document : texte imprimé Auteurs : Sebastian C. Michelic, Auteur ; Jörg M. Thuswaldner, Auteur ; Christian Bernhard, Auteur Année de publication : 2011 Article en page(s) : pp. 2738–2751 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Cellular  automaton  Microsegregation  Multicomponent  solidification Résumé : Various models for simulating dendritic solidification have been proposed in the past. However, those models based on cellular automata (adopting the virtual front-tracking (VFT) concept) are often only suitable for the consideration of one alloying element. As typical industrial alloys are constituted of numerous alloying elements, the application of these models to practical alloys is therefore rather limited. In order to overcome this drawback, a new, modified VFT model, which allows for the treatment of several alloying elements in the low Péclet number regime, is presented. By a new and effective approach, based on a functional extrapolation of the concentration gradient, we are able to study dendritic growth in multicomponent Fe–C–Si–Mn–P–S alloys. Comparisons with well-established analytical models confirm the correctness of the model; results for free and constrained dendritic growth effectively demonstrate the capabilities of this new model. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410000248 [article] Polydimensional modelling of dendritic growth and microsegregation in multicomponent alloys [texte imprimé] / Sebastian C. Michelic, Auteur ; Jörg M. Thuswaldner, Auteur ; Christian Bernhard, Auteur . - 2011 . - pp. 2738–2751. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 7 (Avril 2010) . - pp. 2738–2751 Mots-clés : Cellular  automaton  Microsegregation  Multicomponent  solidification Résumé : Various models for simulating dendritic solidification have been proposed in the past. However, those models based on cellular automata (adopting the virtual front-tracking (VFT) concept) are often only suitable for the consideration of one alloying element. As typical industrial alloys are constituted of numerous alloying elements, the application of these models to practical alloys is therefore rather limited. In order to overcome this drawback, a new, modified VFT model, which allows for the treatment of several alloying elements in the low Péclet number regime, is presented. By a new and effective approach, based on a functional extrapolation of the concentration gradient, we are able to study dendritic growth in multicomponent Fe–C–Si–Mn–P–S alloys. Comparisons with well-established analytical models confirm the correctness of the model; results for free and constrained dendritic growth effectively demonstrate the capabilities of this new model. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410000248