Problem 4: A planar array of dislocations in the plane of the page is shown in the following figures. Dislocation segments AD, DC, and CB are all right-handed screw dislocations with Burgers vectors of length b. The angles made at the junctions of the dislocation segments are all 120, some of which are labeled. Determine the magnitude of the Burgers vector and give a clear statement of the type of dislocation found in that segment. B RHS 120 A C RHS F 120 120 RHS D E