Interfacial Stresses and the Anomalous Character of Thermoelastic-Deformation Curves of a Cu–Al–Ni Shape-Memory Alloy

Thermoelastic-deformation curves of a single-crystalline Cu–13.5 wt % Al–4.0 wt % Ni shapememory (SM) alloy have been studied. Cyclic temperature variation in a 300–450 K interval revealed an anomalous character of thermoelastic hysteresis loops with regions of accelerated straining at both heating...

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Bibliographic Details
Published inTechnical physics letters Vol. 43; no. 12; pp. 1109 - 1111
Main Authors Malygin, G. A., Nikolaev, V. I., Pulnev, S. A., Chikiryaka, A. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2017
Springer Nature B.V
Subjects
Alloys
Classical and Continuum Physics
Copper base alloys
Deformation
Hysteresis loops
Interfacial stresses
Martensitic transformations
Physics
Physics and Astronomy
Shape memory alloys
Single crystals
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Summary:Thermoelastic-deformation curves of a single-crystalline Cu–13.5 wt % Al–4.0 wt % Ni shapememory (SM) alloy have been studied. Cyclic temperature variation in a 300–450 K interval revealed an anomalous character of thermoelastic hysteresis loops with regions of accelerated straining at both heating and cooling stages. The observed phenomenon can be used for increasing the response speed of SM-alloy based drive and sensor devices. Analysis of this phenomenon in the framework of the theory of diffuse martensitic transformations showed that the anomalous character of thermoelastic hysteresis loops may be related to the influence of interfacial stresses on the dynamics of martensitic transformations in these SM alloys.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785017120239