The influence of thermal cycling on electrical properties of pre-deformed Ti-49.8%Ni alloy

R.I. Babicheva1, Kh.Ya. Mulyukov1
1Institute for Metals Superplasticity Problems RAS, Khalturin St. 39, 450001 Ufa, Russia
Abstract
The effect of thermal cycling on electrical properties of Ti-49.8%Ni alloy pre-deformed by rolling at 500ºС was studied. It was shown that the number of cycles, i.e., the number of phase transformations, during thermal cycling can strongly affect the temperature dependences of electricity. Generation of dislocations during phase transitions leads to increase of electrical resistance of the alloy and stabilization of B19'-phase in austenite matrix. The electricity of the material does not change upon further cycling after the dislocation density saturates to a certain value.
Received: 05 March 2011   Revised: 22 March 2011   Accepted: 23 March 2011
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