Journal
ACTA MATERIALIA
Volume 56, Issue 11, Pages 2570-2575Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2008.01.045
Keywords
dislocations; displacement; strain; high-resolution electron microscopy; geometric phase analysis
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We present a displacement and strain analysis of edge dislocation core in gold. The displacement and strain field around the edge dislocation were mapped by geometric phase analysis of high-resolution transmission electron microscopy images. The displacement and strain measurement results were compared with the isotropic elastic theory dislocation model, the anisotropic elastic theory dislocation model, the Peierls-Nabarro dislocation model and the Foreman dislocation model (a = 4). These comparisons show that the Peierls-Nabarro model is the most appropriate theoretical model to describe the deformation fields of the dislocation core. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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