Journal
ACTA MATERIALIA
Volume 62, Issue -, Pages 89-104Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2013.09.036
Keywords
Phase-field model; Alloy; Solidification; CALPHAD; Numerical method
Funding
- US Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- Laboratory Directed Research and Development Program [12-SI-008]
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A numerical method for the simulation of microstructure evolution during the solidification of an alloy is presented. The approach is based on a phase-field model including a phase variable, an orientation variable given by a quaternion, the alloy composition and a uniform temperature field. Energies and diffusion coefficients used in the model rely on thermodynamic and kinetic databases in the framework of the CALPHAD methodology. The numerical approach is based on a finite volume discretization and an implicit time-stepping algorithm. Numerical results for solidification and accompanying coring effect in a Au-Ni alloy are used to illustrate the methodology. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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