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Hysteresis in a system driven by either generalized force or displacement variables: martensitic phase transition in single-crystalline Cu-Zn-Al
Bonnot, Erell; Romero, Ricardo; Illa i Tortós, Xavier; Mañosa, Lluís; Planes Vila, Antoni; Vives i Santa-Eulàlia, Eduard
Universitat de Barcelona
We report on experiments aimed at comparing the hysteretic response of a Cu-Zn-Al single crystal undergoing a martensitic transition under strain-driven and stress-driven conditions. Strain-driven experiments were performed using a conventional tensile machine while a special device was designed to perform stress-driven experiments. Significant differences in the hysteresis loops were found. The strain-driven curves show reentrant behavior yield point which is not observed in the stress-driven case. The dissipated energy in the stress-driven curves is larger than in the strain-driven ones. Results from recently proposed models qualitatively agree with experiments.
Propietats magnètiques
Transformacions martensítiques
Magnetic properties
Martensitic transformations
(c) The American Physical Society, 2007
The American Physical Society

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