Journal
SCRIPTA MATERIALIA
Volume 59, Issue 11, Pages 1182-1185Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.08.004
Keywords
Constitutive equations; Copper; Stress-strain relationship measurements; Thin films; Image force
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Funding
- DAAD-the German Academic Exchange Service
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We considered the effect of the thickness of copper sheet on its tensile strength. A model in which the strength of surface grains is governed by dislocation image forces, while that of interior grains is determined by dislocation cell structure, was proposed. Using a rule of mixtures, the dependence of strength on the specimen thickness was calculated. A master curve representing the calculated dependence of normalized strength on the ratio of sheet thickness to grain size was confirmed by experiment. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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