The Influence of Elastic Anisotropy on Extended Dislocation Nodes

✍ Scribed by B. Pettersson

• Publisher: John Wiley and Sons
• Year: 1972
• Tongue: English
• Weight: 452 KB
• Volume: 54
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2220540125

✦ Synopsis

Abstract

The interaction forces between the partial dislocations comprising an extended dislocation node are calculated using elasticity theory for anisotropic media. The calculations are carried out for nodes of screw, edge, and mixed character in Ag which has an anisotropy ratio A equal to three, and in a hypothetical material with A = 1 and with the same shear modulus as Ag. The results are compared with those of three previous theories using isotropic elasticity theory and developed by Brown and Thölén, Siems, and Jøssang et al. As expected, the effect of anisotropy in Ag is of the same order of magnitude as the uncertainty due to the dislocation core energy.