The problem of a screw dislocation inside a circular inhomogeneity incorporating interface stress was investigated. The analytical expressions of the complex potentials, stress fields and the image force acting on the dislocation were obtained by using the complex variable method. The image force acting on the screw dislocation was examined in detail. The results showed that the influence of the interface stress upon the movement and equilibrium positions of the screw dislocation inside the inhomogeneity could be significant when the radius of the inhomogeneity was reduced to the nm scale. It could be seen that an additional repulsive force or attractive force acting upon the dislocation would be produced for considering the interface stress, and the normalized image force depended upon the size of the inhomogeneity which differed from the classical solution.

Analysis of a Screw Dislocation Inside an Inhomogeneity with Interface Stress. Y.W.Liu, Q.H.Fang: Materials Science and Engineering A, 2007, 464[1-2], 117-23