期刊
ACTA MATERIALIA
卷 52, 期 9, 页码 2837-2845出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2004.02.032
关键词
phase-field model; Ni-base alloys; coarsening; kinetics; thermodynamics
The coarsening kinetics of gamma' precipitates in binary Ni-Al alloy is studied using three-dimensional (3D) phase-field simulations. The bulk thermodynamic information and atomic diffusion mobilities are obtained from databases constructed using the CALP-HAD approach, while the experimental values for the interfacial energy, elastic constants and lattice mismatch are directly employed in the phase-field model. Specifically, we predict the morphological evolution, average precipitate size, and size distribution as a function of time for a given temperature and composition. Comparison of the phase-field simulation results with experiments shows Good quantitative agreement in both time and length scales. (C) 2004 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
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