Journal
SCRIPTA MATERIALIA
Volume 64, Issue 1, Pages 57-60Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2010.09.003
Keywords
Ultrafine grained microstructure; Ductility; Orientation imaging microscopy (OIM); Grain boundaries
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Two-phase ultrafine-grained (UFG) aluminum alloys with different precipitate and low-angle boundary distributions were examined for their monotonic stress-strain behavior Precipitates in combination with low-angle grain boundaries were found to determine the deformation micromechanism It is proposed that thermally activated vacancy movement plays a central role in this regard The experimental stress strain curves matched well with the trend predicted by a modified Blum-Zheng model based on vacancy-assisted dislocation annihilation mechanism (C) 2010 Acta Materialia Inc Published by Elsevier Ltd All rights reserved
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