Real Materials

� The creation of an Edge dislocation via slip is illustrated below.
� The ideal crystal is cut over the plane ADEF, and the material above this plane is displaced by b with respect to the material below the plane.

From: Hull,
"Introduction to Dislocations,"
Pergamon (1965)

� The boundary between the slipped and un-slipped regions of the plane ABCD is the dislocation line, EF with the line vector, t.
� The Burgers vector, b, is the slip vector of the displacement.
� Even if EF is not straight, the same slip vector characterizes the process and has the same magnitude and direction for all points on the dislocation line.