The critical stress for the breakaway of a segment of tilt boundary from an otherwise pinned boundary was determined for segment lengths which were greater than about 10nm. The result was consistent with a simple constant boundary energy per unit area model.

Critical Stress for the Escape of a Group of Dislocations from a Partially Pinned Tilt Boundary. S.V.Kamat, J.P.Hirth: Scripta Metallurgica et Materialia, 1995, 32[11], 1795-800