Metallurgical Transactions

, Volume 5, Issue 6, pp 1373–1381

The plastic deformation of TiAl

  • D. Shechtman
  • M. J. Blackburn
  • H. A. Lipsitt
Mechanical Behavior

DOI: 10.1007/BF02646623

Cite this article as:
Shechtman, D., Blackburn, M.J. & Lipsitt, H.A. MT (1974) 5: 1373. doi:10.1007/BF02646623

Abstract

The deformation substructure of TiAl (Llo type ordered lattice) tested in compression, and the factors determining it were investigated. Two types of dislocations take part in the plas-tic deformation, namely a/2 [110] and a/2 [Oil]. The latter type will disorder the Llo super-lattice and therefore would be expected to move in pairs as superdislocations. Some obser-vations are essentially in agreement with the predictions, however the large proportion and morphology of a/2 [O1l] dislocations observed was unexpected. Twins of the [112] (111) type play an important role in the deformation of the alloy, and the early stages of their formation have been recorded. Finally, equi-Schmid factor lines have been constructed in an attempt to evaluate the importance of the sense of the applied stress on the deformation capability of the alloy.

Copyright information

© American Society for Metals, The Melallurgical Society of AIME 1974

Authors and Affiliations

  • D. Shechtman
    • 1
  • M. J. Blackburn
    • 1
  • H. A. Lipsitt
    • 1
  1. 1.Pratt & Whitney AircraftEast HartfordConnecticut