Transmission electron microscopy was used to examine the dislocation structure of Ti3Al subjected to deformation at 1073 to 1273K. The microstructure of samples subjected to high-temperature deformation was shown to contain mobile super-dislocations of a and 2c + a types, and single dislocations with a Burgers vector [00•1] were also observed on the prismatic planes. Possible models of destruction of barriers associated with 2c + a super-dislocations on the pyramidal planes were considered; using the results of computer simulations of the structure of a super-dislocation core in Ti3Al.

Dislocation Structure of Intermetallic Ti3Al Subjected to High-Temperature Deformation. L.E.Karkina, O.A.Elkina, L.I.Yakovenkova: Physics of the Solid State, 2008, 50[5], 832-8