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Title: Orientation-field models for polycrystalline solidification: grain coarsening and complex growth forms
Authors: Korbuly, Balint
Pusztai, Tamas
Toth, Gyula I.
Henry, Herve
Plapp, Mathis
Granasy, Laszlo
Keywords: Polycrystalline solidification
Polycrystalline growth
Growth front nucleation
Orientation field models
Multiphase-field models
Computational materials science
Issue Date: 2017
Publisher: © Elsevier
Citation: KORBULY, B. ...et al., 2017. Orientation-field models for polycrystalline solidification: grain coarsening and complex growth forms. Journal of Crystal Growth, 457, pp. 32-37.
Abstract: We compare two versions of the phase-field theory for polycrystalline solidification, both relying on the concept of orientation fields: one by Kobayashi et al. [Physica D 140 (2000) 141] and the other by Henry et al. [Phys. Rev. B 86 (2012) 054117]. Setting the model parameters so that the grain boundary energies and the time scale of grain growth are comparable in the two models, we first study the grain coarsening process including the limiting grain size distribution, and compare the results to those from experiments on thin films, to the models of Hillert, and Mullins, and to predictions by multiphase-field theories. Next, following earlier work by Gránásy et al. [Phys. Rev. Lett. 88 (2002) 206105; Phys. Rev. E 72 (2005) 011605], we extend the orientation field to the liquid state, where the orientation field is made to fluctuate in time and space, and employ the model for describing of multi-dendritic solidification, and polycrystalline growth, including the formation of “dizzy” dendrites disordered via the interaction with foreign particles.
Description: This paper was accepted for publication in the journal Journal of Crystal Growth and the definitive published version is available at https://doi.org/10.1016/j.jcrysgro.2016.06.040
Sponsor: This work has been supported by the Hungarian-French Bilateral Scientific and Technological Innovation Fund under Grant No. TÉT_12_FR-2-2014-0034; the National Agency for Research, Development, and Innovation (NKFIH) , Hungary under contract No. OTKA-K-115959; and by the EU FP7 Collaborative Project “EXOMET” (contract no. NMP-LA-2012-280421, co-funded by ESA).
Version: Accepted for publication
DOI: 10.1016/j.jcrysgro.2016.06.040
URI: https://dspace.lboro.ac.uk/2134/27266
Publisher Link: https://doi.org/10.1016/j.jcrysgro.2016.06.040
ISSN: 0022-0248
Appears in Collections:Published Articles (Maths)

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