4.7 Article

A model for the grain size dependent work hardening of copper

Journal

SCRIPTA MATERIALIA
Volume 55, Issue 8, Pages 739-742

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2006.05.018

Keywords

copper; work hardening; grain boundaries; internal stresses

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A model is proposed for the low temperature tensile response of copper polycrystals with grain sizes in the range of 2-50 mu m. The initial work hardening behaviour is strongly grain size dependent and is considered to arise from a combination of kinematic and isotropic hardening due to dislocation-grain boundary interactions. At larger strains, the influence of grain size on work hardening disappears owing to processes associated with dynamic recovery at boundaries. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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