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.