Abstract
The energies of surface defects in the basal and prismatic planes, as well as in the planes of type I and type II pyramids, are calculated by using N-particle interaction potentials for the Ti3Al intermetallic with the D019 superlattice. The core structure of 2c + a edge and screw glissile and sessile (barrier-forming) dislocations in pyramidal planes of type I, \(\{ 20\overline 2 1\} \), and type II, \(\{ \overline 1 \overline 1 21\} \), in Ti3Al is analyzed.
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