Journal
SCRIPTA MATERIALIA
Volume 60, Issue 8, Pages 675-678Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.12.037
Keywords
Molecular dynamics; Dislocation theory; Plastic deformation; Theoretical shear strength
Categories
Funding
- National Science Foundation [072265]
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Molecular dynamics simulations are used to investigate orientation and rate dependence of partial dislocation nucleation in Cu. As the strain rate is reduced from 10(9) to 1(0)7 s(-1), the tensile stress required for homogeneous dislocation nucleation is reduced by at most 5%. Furthermore, mild orientation sensitivity is observed in the rate dependence of the critical tensile stress. The computed resolved shear stress for partial dislocation nucleation is consistent with previous ab initio calculations of the theoretical shear strength of Cu. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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