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Numéro
J. Phys. IV France
Volume 01, Numéro C4, Novembre 1991
EUROPEAN SYMPOSIUM ON MARTENSITIC TRANSFORMATION AND SHAPE MEMORY PROPERTIES
Page(s) C4-253 - C4-258
DOI http://dx.doi.org/10.1051/jp4:1991438
EUROPEAN SYMPOSIUM ON MARTENSITIC TRANSFORMATION AND SHAPE MEMORY PROPERTIES

J. Phys. IV France 01 (1991) C4-253-C4-258

DOI: 10.1051/jp4:1991438

INTERNAL FRICTION STUDY OF STRESS-INDUCED MARTENSITIC TRANSFORMATION IN Cu-Zn-Al SHAPE MEMORY ALLOYS

J. STOIBER, J.-E. BIDAUX and R. GOTTHARDT

Institut de Génie Atomique, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland


Abstract
The method of internal friction has been used for studying stress-induced martensitic transformation in Cu-Zn-Al polycrystals. The observed internal friction spectrum for a given pseudoelastic cycle is a unique, non-linear function of the transformation rate, and is independent of the actual amount of transformed volume. The internal friction values decrease with increasing stress cycling temperature, indicating that only at sufficiently high temperatures above Ms is a perfectly oriented martensitic structure obtained.



© EDP Sciences 1991