Experimental examination of displacement and strain fields in an edge dislocation core

✍ Scribed by C.W. Zhao; Y.M. Xing; C.E. Zhou; P.C. Bai

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 996 KB
• Volume: 56
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/j.actamat.2008.01.045

✦ Synopsis

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.