Thermoelastic analysis of a copper-based monocristalline shape-memory alloy

D. Delpueyo; X. Balandraud; M. Grédiac; R. Fillit

doi:10.1051/epjconf/20100629007

EPJ

Thermoelastic analysis of a copper-based monocristalline shape-memory alloy

D. Delpueyo¹, X. Balandraud¹^a, M. Grédiac¹ and R. Fillit²

¹ Laboratoire de Mécanique et Ingénieries (LaMI), Université Blaise Pascal (UBP) & Institut Français de Mécanique Avancée (IFMA), Campus de Clermont-ferrand - Les Cézeaux, BP 265, 63175 Aubière cedex, France
² École Supérieure des Mines de Saint-Étienne, Centre « Science des Matériaux et des Structures » UMR CNRS 5176 PECM, 158 cours Fauriel, 42023 Saint-Etienne cedex 2, France.

Abstract

The objective of this study is to observe the thermoelastic coupling effect in a monocrystalline Cu-Al-Be shape-memory alloy. The orientation of the austenite crystal is measured by Microfocus X-ray texture analysis. Uniaxial cyclic loading is applied to the specimen at room temperature. Infrared thermography is used to capture temperature fields on the specimen surface. The approach consists in analysing the cyclic temperature oscillation of points located on the surface of the specimen. The study highlights first the significant difference between the thermoelastic couplings in austenite and martensite. Second the anisotropy of both phases, especially the martensite, is evidenced.