Temperature Anomalies of Deformation Behavior and Dislocation Structure of Ti3Al: A Review

Experimental data on the temperature anomalies of deformation characteristics and dislocation structure of Ti3Al oriented for pyramidal slip have been reviewed. The results of the investigations that are performed by the method of computer simulation with the use of N-particle potentials of interatomic interaction have been reported. The subject of the studies was the core structure of 2c + a superdislocations in pyramid planes in glissile configurations and configurations of dislocation barriers. A dislocation model of thermally activated formation and destruction of dislocation barriers that are responsible for the anomaly of the deformation behavior of Ti3Al has been discussed; the model makes it possible to account for the observed experimental data.