In Ni3Al polycrystals deformed at 850C and quenched rapidly, surface defects exhibited two kinds of behaviour. On the one hand, dislocation coupling by antiphase boundary and complex stacking fault was of normal magnitude for this alloy composition. On the other hand, separations were dramatically decreased in both cases. A method to visualize antiphase boundaries using a weakly excited superlattice reflection was introduced.

Some Unusual Properties of the Fine Structure of Dislocations in Ni3Al Deformed at High Temperature. Veyssiere, P., Horton, J.A.: Materials Research Society Symposium – Proceedings, 1995, 364[1], 339-44