Elastic interaction of a point defect with a prismatic dislocation loop in hexagonal crystals

Abstract

Effects of elastic anisotropy on the interaction between an axially symmetric point defect and a prismatic dislocation loop in hexagonal crystals were investigated. The elastic interaction was affected significantly by the anisotropic elastic field of a loop. The most pronounced effects were found in zinc and graphite. Generally, effects of the point defect anisotropy were much more pronounced than those of the anisotropic elastic field of a loop. A point defect of which strain is greater in the a direction than in the c direction finds two centers of concentration (or depletion) at directly above and below a prismatic loop. The distance between the concentration center and the loop varies with the degree of anisotropy in the elastic self‐fields of both the point defect and the prismatic loop.