[article]
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 |
in Acta materialia > Vol. 58 N° 10 (Juin 2010) . - pp. 3664–3675
[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 |
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