Temperature anomalies of deformation behavior and dislocation structure of Ti3Al: A review

• Published in: Physics of metals and metallography Vol. 108; no. 2; pp. 179 - 206
• Main Authors: Kar’kina, L. E., Yakovenkova, L. I.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.08.2009; Springer Nature B.V
• Subjects: Chemistry and Materials Science; Computer simulation; Deformation; Materials Science; Metallic Materials; Strength and Plasticity; Studies; 61.50.Ks; 81.40.-z
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X09080110

Experimental data on the temperature anomalies of deformation characteristics and dislocation structure of Ti 3 Al 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 2 c + 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 Ti 3 Al has been discussed; the model makes it possible to account for the observed experimental data.