Abstract
On one hand, bi-compression tests and tension (compression)-internal pressure tests on a Cu-Al-Be shape memory alloy (SMA) polycrystals permit the determination of the yield surface of phase transformation initiation (Austenite → Martensite). On the second hand, the lattice measurements of the L21 austenite and the monoclinic martensite cells for this alloy permit to determine the “nature” of the phase transformation i.e. an exact interface between the parent phase and an untwinned martensite variant. Hence, a micro-macro integration allows to predict the yield curve of the same polycrystalline alloys. At last, some tools are given for a general phenomenological modeling at the macroscopic scale, in the frame of the thermodynamic of irreversible process of isotropic pseudoelasticity in SMA. These two different investigations fit well the experimental results.
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Bouvet, C., Calloch, S., Lexcellent, C., Vivet, A. (2002). Testing and Modeling A Cu-Al-Be Shape Memory Alloy Behavior under Complex Stress Loading. In: Sun, Q.P. (eds) IUTAM Symposium on Mechanics of Martensitic Phase Transformation in Solids. Solid Mechanics and Its Applications, vol 101. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0069-6_9
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DOI: https://doi.org/10.1007/978-94-017-0069-6_9
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