fig5

Figure 5. The displacement curves of atomic pairs in different structural units near the crack tips in FCC Al with respect to the stress intensity factor, along with the interval variations in stress intensity factor for each dislocation emission at the crack tips. The differences in displacement of atomic pairs 1 and 1’, 2 and 2’, and 3 and 3’ as a function of stress intensity factor during dislocation emission of (A) the first structural unit, (B) the second structural unit, and (C) the third structural unit; (D) Incremental changes in stress intensity factor among emission of four partial dislocations at the crack tips. FCC: Faced-centered cubic.