Recrystallization boundary migration in the 3D heterogeneous microstructure near a hardness indent

SCRIPTA MATERIALIA

卷:205

Article

Hong, Chuanshi¹  Zhang, Yubin¹  Lindkvist, Adam¹  Liu, Wenjun²  Tischler, Jon²  Xu, Ruqing²  Jensen, Dorte Juul² 

[1] Tech Univ Denmark, Dept Mech Engn, DK-2800 Lyngby, Denmark

[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

关键词: Recrystallization;    Grain boundary migration;    Synchrotron radiation;    3D reconstruction;    Heterostructures;   

DOI  :  10.1016/j.scriptamat.2021.114187

来源: Elsevier

【 摘 要 】

Boundary migration during recrystallization in the heterogeneous microstructure near a hardness indent in lightly rolled pure Al was followed in 3D. The microstructure after multiple steps of ex-situ annealing was examined using synchrotron white-beam differential-aperture X-ray microscopy, supplemented by scanning electron microscopy. Heterogeneous recrystallization boundary migration was observed and analyzed in terms of driving force and boundary characteristics. The results reveal very similar local stored energies and boundary misorientations for the migrating and stationary boundary segments, whereas the grain boundary normals differ significantly. Effects of grain boundary mobility and deformation microstructure morphology on the migration are discussed. (c) 2021 The Authors. 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/ )

【 授权许可】

Free