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A quantitative multi-phase field model of polycrystalline alloy solidification / Nana Ofori-Opoku in Acta materialia, Vol. 58 N° 6 (Avril 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 2155–2164 Titre : A quantitative multi-phase field model of polycrystalline alloy solidification Type de document : texte imprimé Auteurs : Nana Ofori-Opoku, Auteur ; Nikolas Provatas, Auteur Année de publication : 2011 Article en page(s) : pp. 2155–2164 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Solidification  Dendritic  growth  Phase  field  modeling Résumé : A multi-phase field model for quantitative simulations of polycrystalline solidification of binary alloys is introduced. During the free-growth stage of solidification, the model exploits the thin-interface analysis developed by Karma [3] in order to realistically capture bulk phase diffusion and the sharp interface corrections predicted by traditional models of solidification. During grain boundary coalescence, the model is constructed to reproduce the properties of repulsive grain boundaries described by Rappaz et al. [29]. The model provides a very simple mechanism for decoupling of solute and concentration fields at steady state, an important feature for calculating grain boundary energies. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008350 [article] A quantitative multi-phase field model of polycrystalline alloy solidification [texte imprimé] / Nana Ofori-Opoku, Auteur ; Nikolas Provatas, Auteur . - 2011 . - pp. 2155–2164. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 2155–2164 Mots-clés : Solidification  Dendritic  growth  Phase  field  modeling Résumé : A multi-phase field model for quantitative simulations of polycrystalline solidification of binary alloys is introduced. During the free-growth stage of solidification, the model exploits the thin-interface analysis developed by Karma [3] in order to realistically capture bulk phase diffusion and the sharp interface corrections predicted by traditional models of solidification. During grain boundary coalescence, the model is constructed to reproduce the properties of repulsive grain boundaries described by Rappaz et al. [29]. The model provides a very simple mechanism for decoupling of solute and concentration fields at steady state, an important feature for calculating grain boundary energies. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008350