The equilibrium separation of partial dislocations in a wall of extended edge dislocations was calculated as a function of the angle of misfit of the wall. The separation decreased with increase in the angle of misfit; being the same as that of a single dislocation when the angle was low and approached a value which was inversely proportional to the angle when the angle was high. From the variation of strain energy of such a wall with the angle it was possible to estimate the stacking fault energy. The method was illustrated for the case of copper using the energy of, and a model for, a (100)[001] tilt boundary. A value of 25mJ/m2 for the stacking fault energy in copper at 1065C was deduced in this manner

Energy of a Wall of Extended Dislocations. J.C.M.Li, B.Chalmers: Acta Metallurgica, 1963, 11[4], 243-9