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Aging Influence on the Shape Memory Effects and Superelasticity in Titanium-Nickel Single Crystals

Published online by Cambridge University Press:  10 February 2011

Yu.I. Chumlyakov
Affiliation:
Siberian Physical Technical Institute, Revolution sq., 1, Tomsk 634050, Russia, chum@phys.tsu.tomsk.su
I. V. Kireeva
Affiliation:
Siberian Physical Technical Institute, Revolution sq., 1, Tomsk 634050, Russia, chum@phys.tsu.tomsk.su
V. N. Lineytsev
Affiliation:
Siberian Physical Technical Institute, Revolution sq., 1, Tomsk 634050, Russia, chum@phys.tsu.tomsk.su
A. G. Lwisyuk
Affiliation:
Siberian Physical Technical Institute, Revolution sq., 1, Tomsk 634050, Russia, chum@phys.tsu.tomsk.su
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Abstract

On the Ti-50.8%Ni, Ti-51%Ni and Ti-51.3%Ni (at.%) single crystals, the investigations of the shape memory effects (SME) and superelasticity (SE) have been carried out in order to find out the dependence on a size and a volume fraction of the Ti3Ni4 dispersive particles, a crystal orientation and a sign of applied stress. It is shown, that in crystals without particles the strong dependence of SME on an orientation and a sign of applied stress takes place and SE is not observed. Precipitation of the coherent particles of Ti3Ni4 of 50–100 nm in size leads to the reduction of SME, weakening of orientation dependence of σcr interval of stress-induced martensitic transformations (MT).

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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References

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