Off-stoichiometric binary Ni3Al samples, deformed at varied temperatures, were analysed in order to determine the sensitivity of the microstructures to a change in alloy composition. The results were compared with those obtained previously in a nearly stoichiometric alloy. It was found that the antiphase boundary energies were highly dependent upon the composition, especially after high-temperature deformation. In addition, orientational effects on dislocation lines were found to be dramatically sensitive to composition.

On the Effect of Deviation from Stoichiometry on the Deformation Microstructure of Binary Ni3Al. Douin, J., Veyssiere, P.: Philosophical Magazine A, 1991, 64[4], 807-17