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Diffusivities of an Al-Fe-Ni melt and their effects on the microstructure during solidification

L. Zhang, Y. Du, I. Steinbach, Q. Chen, B. Huang

Acta Materialia, 58, 3664-3675, (2010)

DOI: 10.1016/j.actamat.2010.03.002

Download: BibTEX

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.

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{"type":"article", "name":"l.zhang20106", "author":"L. Zhang and Y. Du and I. Steinbach and Q. Chen and B. Huang", "title":"Diffusivities of an AlFeNi melt and their effects on the microstructure during solidification", "journal":"Acta Materialia", "volume":"58", "OPTnumber":"", "OPTmonth":"6", "year":"2010", "OPTpages":"3664-3675", "OPTnote":"", "OPTkey":"Al-Fe-Ni melt; Diffusion; Atomic mobility; Microstructure; Solidification", "DOI":"10.1016/j.actamat.2010.03.002"}
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