PPT Slide
(a) Sessile or Frank Dislocations
These are immobile dislocations.
They appear under two specific conditions that are shown in Fig. 13-9.
Condition I (Intrinsic): A disk was removed in plane (111), as shown in Figure 13-9(a)
Condition II (Extrinsic): A disk was added in plane (111), as shown in Figure 13 (b).
Immobile Dislocations in FCC