An experimentally-based molecular dynamics analysis of grain boundary migration during recrystallization in aluminum

RG Li and ER Homer and CS Hong and YB Zhang and DJ Jensen, SCRIPTA MATERIALIA, 211, 114489 (2022).

DOI: 10.1016/j.scriptamat.2021.114489

Recent synchrotron X-ray measurements examined three-dimensional boundary migration during recrys-tallization Scripta Mater 205 (2021) 114187. To analyze possible correlations between grain boundary mobility and the observed heterogeneous boundary migration, molecular dynamics simulations were car-ried out. Migration of two selected boundary segments were simulated in both planar and spherical bicrystal atomistic models. These two segments were chosen because in the experiment one was ob-served to migrate much faster than the other. The simulations reveal that mobility cannot account for the experimentally observed heterogeneous migration. The result points to the possibility that recrystal-lization boundary migration strongly depends on features within the deformed microstructure.(c) 2021 The Author(s). Published by Elsevier Ltd on behalf of Acta Materialia Inc. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )

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