Temperature dependence of the apparent antiphase boundary energy on cube planes was studied using weak-beam determination of dissociation distances of super-dislocations originating from deformation at 20, 650 and 850C. It was difficult to assess how closely the observed dependence applies to the true cube antiphase boundary energy because of the uncertainty associated with lattice resistance to the motion of super-partials. It was estimated that the true energy of conservative antiphase boundary on {001} was liable to decrease with temperature by as much as 30% between room temperature and 850C.

Temperature Effect on Superdislocation Dissociation on a Cube Plane in Ni3Al. Veyssiere, P., Yoo, M.H., Horton, J.A., Liu, C.T.: Philosophical Magazine Letters, 1989, 59[2], 61-8