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Diffusivities of an Al–Fe–Ni melt and their effects on the microstructure during solidification / Lijun Zhang in Acta materialia, Vol. 58 N° 10 (Juin 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 10 (Juin 2010) . - pp. 3664–3675 Titre : Diffusivities of an Al–Fe–Ni melt and their effects on the microstructure during solidification Type de document : texte imprimé Auteurs : Lijun Zhang, Auteur ; Yong Du, Auteur ; Ingo Steinbach, Auteur Année de publication : 2011 Article en page(s) : pp. 3664–3675 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Al–Fe–Ni  melt  Diffusion  Atomic  mobility  Microstructure  Solidification Résumé : A systematical investigation of the diffusivities in an Al–Fe–Ni melt was presented. Based on the experimental and theoretical data about diffusivities, the temperature- and composition-dependent atomic mobilities were evaluated for the elements in Al–Ni, Al–Fe, Fe–Ni and Al–Fe–Ni melts via an effective approach. Most of the reported diffusivities can be reproduced well by the obtained atomic mobilities. In particular, for the first time the ternary diffusivity of the liquid in a ternary system is described in conjunction with the established atomic mobilities. The effect of the atomic mobilities in a liquid on microstructure and microsegregation during solidification was demonstrated with one Al–Ni binary alloy. The simulation results indicate that accurate databases of mobilities in the liquid phase are much needed for the quantitative simulation of microstructural evolution during solidification by using various approaches, including DICTRA and the phase-field method. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001473 [article] Diffusivities of an Al–Fe–Ni melt and their effects on the microstructure during solidification [texte imprimé] / Lijun Zhang, Auteur ; Yong Du, Auteur ; Ingo Steinbach, Auteur . - 2011 . - pp. 3664–3675. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 10 (Juin 2010) . - pp. 3664–3675 Mots-clés : Al–Fe–Ni  melt  Diffusion  Atomic  mobility  Microstructure  Solidification Résumé : A systematical investigation of the diffusivities in an Al–Fe–Ni melt was presented. Based on the experimental and theoretical data about diffusivities, the temperature- and composition-dependent atomic mobilities were evaluated for the elements in Al–Ni, Al–Fe, Fe–Ni and Al–Fe–Ni melts via an effective approach. Most of the reported diffusivities can be reproduced well by the obtained atomic mobilities. In particular, for the first time the ternary diffusivity of the liquid in a ternary system is described in conjunction with the established atomic mobilities. The effect of the atomic mobilities in a liquid on microstructure and microsegregation during solidification was demonstrated with one Al–Ni binary alloy. The simulation results indicate that accurate databases of mobilities in the liquid phase are much needed for the quantitative simulation of microstructural evolution during solidification by using various approaches, including DICTRA and the phase-field method. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001473