The influence of plastic deformation on polytypic phase transformations in TiCr2 Laves phases

Received 27 May 2010; received in revised form 7 July 2010; accepted 19 July 2010. published online 26 July 2010.
Corrected Proof

The kinetics of the polymorphic C36⇄C14 Laves phase transformation of TiCr2 close to the equilibrium transformation temperature of about 1550K was investigated by differential thermal analysis. Plastic deformation-induced by compression has a considerable affect on the transformation kinetics. This is ascribed to the presence of synchro(-Shockley partial) dislocations introduced during compression. The transformation kinetics are shown to vary with the degree of plastic deformation, i.e. with the dislocation density as characterised by the extent of (X-ray) diffraction line broadening.

Keywords: Cold working, Differential thermal analysis, Intermetallic compounds, Phase-transformation kinetics

a Max Planck Institute for Metals Research, Heisenbergstrasse 3, 70569 Stuttgart, Germany

b Institute for Materials Science, University of Stuttgart, Heisenbergstrasse 3, 70569 Stuttgart, Germany

Corresponding author. Tel.: +49 0711 689 3365; fax: +49 0711 689 3312.

PII: S1359-6462(10)00493-8

doi:10.1016/j.scriptamat.2010.07.020