PART 5: THIN FILMS AND INTERFACES
23 Dislocations in Bimaterials
This chapter contains a detailed analysis of straight (edge and screw) dislocations near the bimaterial interface or near the free surface of a semi-infinite medium. A general elastic study of straight dislocations and dislocation loops was presented earlier in Chapter 18. Here, we focus on those aspects of the dislocation analysis that are of importance to study the strain relaxation in thin films. We first derive the stress fields for straight dislocations near bimaterial interfaces and then specialize these results to dislocations near the free surfaces or rigid boundaries. An energy analysis of dislocations beneath the free surface of a semi-infinite body is ...