Physics:Cross Slip

The screw part of a dislocation loop can move to another slip plane which is called cross slip plane. In this Figure the dislocation Burgers vector is along the intersection of the planes.

Cross slip is the process when a screw dislocation moves from one slip plane to another. As this kind of dislocation (Unlike edge and mixed dislocations) doesn't have a unique glide plane, a pure screw segment is free to move from one slip plane to another if it contains the direction of burgers vector. In face centered cubic metals dislocation can move from one {111} type plane to another and In body centered cubic metals as the slip plane is less well defined, a dislocation with b=0.5<111> can glide on {110} planes or {211} planes. The cross slip of moving dislocations can easily be seen by TEMs.

See also

• Miller indices