It was noted that, in Al-rich γ-phase material which was deformed at room temperature, faulted dipoles were usually trailed by dislocations with a <011] Burgers vector. These in turn were dissociated into 2 partials with 1/6<112] and 1/6<154] Burgers vectors. A faulted dipole was generated at one of the extremities of the screw locks which <011] dislocations tended to exhibit. This occurred via sub-dissociation of the 1/6<154] trailing partial. A local configuration which was atomistically correct for faulted dipole nucleation took place by continuity of the core structure of the 1/6<154] partial between the lock and the connecting mixed segment. The fact that the faulted dipole width did not exceed a certain size was explained in terms of the dynamics of faulted dipole growth.

Properties of <011]{111} Slip in Al-Rich γ-TiAl - II. The Formation of Faulted Dipoles. F.Grégori, P.Veyssière: Philosophical Magazine A, 2000, 80[12], 2933-55