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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) C4-379 - C4-384
DOI http://dx.doi.org/10.1051/jp4:1991457
EUROPEAN SYMPOSIUM ON MARTENSITIC TRANSFORMATION AND SHAPE MEMORY PROPERTIES

J. Phys. IV France 01 (1991) C4-379-C4-384

DOI: 10.1051/jp4:1991457

PROBLEMS ASSOCIATED TO NUCLEATION AND GROWTH IN THE Cu-Zn-Al SMA

A. AMENGUAL1, F.C. LOVEY2 and V. TORRA3

1  Departament de Fisica, Universitat de les Illes Balears, SP-07071 Palma de Mallorca, Spain
2  Division Metales, Centro Atomico de Bariloche, RA-8400 San Carlos de Bariloche, Argentina
3  Dep. Fisica Aplicada, ETSECCP - UPC, SP-08034 Barcelona, Spain


Abstract
We have studied the characteristics of single-interface single-variant martensitic transformations in Cu-Zn-Al shape memory alloys with a high resolution thermal device (temperature resolution 0.003 K, optical resolution up to 1 µm) Two observations are presented : the appearence of an intrinsic thermoelasticity and the possibility to get two β-variants from a martensite single-crystal. The first phenomena is a phase growth problem (the interaction between interface and dislocations), whilst the second depends on the nucleation of the β phase and permits the breakdown of the SME.



© EDP Sciences 1991