Fig. 11 Nucleation and annihilation process of a 1/2<111> dislocation on the interface when d1 is applied along the y -axis. The whole process is contained in the third cycle. The view is kept parallel to the interface by rotating the coordinate system.
Figure 12 shows the growth process of dislocations on the interface when d3 is applied along the y - axis. The whole process took place within the first quarter of the first cycle, from 11.2ps to 13.6ps (shown in Fig. 5d). With the increase of shear deformation, a large number of dislocations begin to nucleate and grow rapidly (shown in Fig. 12), eventually leading to a dislocation density peak in Fig. 7c. In addition, the large residual strain causes the overgrowth and reaction of dislocations. During the reduction of shear deformation, lots of dislocations still remain in the model, which is the main reason for the large number of dislocations and defect meshes in the model at the end of the first cycle in Fig. 10c.