|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||Grain Coarsening in Two-dimensional Phase-field Models with an Orientation Field
||Bálint Korbuly, Tamás Pusztai, Hervé Henry, Mathis Plapp, Markus Apel, László Gránásy
|On-Site Speaker (Planned)
In the literature, contradictory results have been published regarding the form of the limiting grain size distribution (LGSD) that characterizes the late stage grain coarsening in (quasi-)two-dimensional polycrystalline systems. While experiments and the phase-field crystal (PFC) model indicate a lognormal distribution, other works including theoretical studies, the multi-phase-field (MPF) and orientation-field (OF) models yield significantly different distributions. We show that the coarse grained phase-field models yield very similar limiting size distributions that differ from the theoretical predictions, but in the case of OF models a partial detection of the small angle grain boundaries leads to a lognormal distribution close to those seen in the experiments and the PFC simulations. This indicates 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.
||Planned: Supplemental Proceedings volume