Grain coarsening in two-dimensional phase-field models with an orientation field

Bálint Korbuly, Tamás Pusztai, Hervé Henry, Mathis Plapp, Markus Apel, and László Gránásy
Phys. Rev. E 95, 053303 – Published 9 May 2017

Abstract

In the literature, contradictory results have been published regarding the form of the limiting (long-time) grain size distribution (LGSD) that characterizes the late stage grain coarsening in two-dimensional and quasi-two-dimensional polycrystalline systems. While experiments and the phase-field crystal (PFC) model (a simple dynamical density functional theory) indicate a log-normal distribution, other works including theoretical studies based on conventional phase-field simulations that rely on coarse grained fields, like the multi-phase-field (MPF) and orientation field (OF) models, yield significantly different distributions. In a recent work, we have shown that the coarse grained phase-field models (whether MPF or OF) yield very similar limiting size distributions that seem to differ from the theoretical predictions. Herein, we revisit this problem, and demonstrate in the case of OF models [R. Kobayashi, J. A. Warren, and W. C. Carter, Physica D 140, 141 (2000); H. Henry, J. Mellenthin, and M. Plapp, Phys. Rev. B 86, 054117 (2012)] that an insufficient resolution of the small angle grain boundaries leads to a log-normal distribution close to those seen in the experiments and the molecular scale PFC simulations. Our paper indicates, furthermore, that the LGSD is critically sensitive to the details of the evaluation process, and raises the possibility that the differences among the LGSD results from different sources may originate from differences in the detection of small angle grain boundaries.

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  • Received 5 January 2017

DOI:https://doi.org/10.1103/PhysRevE.95.053303

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Bálint Korbuly1, Tamás Pusztai1, Hervé Henry2, Mathis Plapp2, Markus Apel3, and László Gránásy1,4

  • 1Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Post Office Box 49, H-1525 Budapest, Hungary
  • 2Laboratoire Physique de la Matière Condensée, École Polytechnique, Centre National de la Recherche Scientifique, Université Paris-Saclay, 91128 Palaiseau Cedex, France
  • 3Access e.V., Intzestrasse 5, 52072 Aachen, Germany
  • 4BCAST, Brunel University, Uxbridge, Middlesex UB8 3PH, England, United Kingdom

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Issue

Vol. 95, Iss. 5 — May 2017

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