Phase-field model study of the crystal morphological evolution of hcp metals

An expression for anisotropic interfacial energy of hexagonal close-packed metals has been formulated which is able to reproduce published data obtained using the modified embedded-atom method, covering the variation in interface energy as a function of orientation for a number of metals. The coeffi...

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Bibliographic Details
Published in:Acta materialia 2009-06, Vol.57 (11), p.3382-3390
Main Authors: Qin, R.S., Bhadeshia, H.K.D.H.
Format: Article
Language:English
Subjects:
Anisotropy
Applied sciences
Exact sciences and technology
Grain morphology
Interfaces
Metals. Metallurgy
Phase-field modelling
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Summary:An expression for anisotropic interfacial energy of hexagonal close-packed metals has been formulated which is able to reproduce published data obtained using the modified embedded-atom method, covering the variation in interface energy as a function of orientation for a number of metals. The coefficients associated with the expression can be determined fully by measured or calculated interfacial energies of just three independent crystal planes. Three-dimensional phase-field model simulations using this representation of interfacial energy have been found to yield convincing crystal morphologies. The apparent rate of crystal growth as a function of orientation in the phase-field simulation agrees with predictions made by surface energy theory.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2009.04.001