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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) C4-451 - C4-456
DOI http://dx.doi.org/10.1051/jp4:1991468
EUROPEAN SYMPOSIUM ON MARTENSITIC TRANSFORMATION AND SHAPE MEMORY PROPERTIES

J. Phys. IV France 01 (1991) C4-451-C4-456

DOI: 10.1051/jp4:1991468

SOME ASPECTS OF THE TWO WAY SHAPE MEMORY EFFECT INDUCED BY PSEUDOELASTIC CYCLING IN Cu-Zn-Al ALLOYS

E. CESARI1, C. PICORNELL1, J. PONS1 and M. SADE2

1  Dept. Fisica, Universitat de les Illes Balears, Ctra. de Valldemossa, km. 7.5, SP-07071 Palma de Mallorca, Spain
2  Division Metales, Centro Atomico Bariloche, RA-8400 San Carlos de Bariloche, Argentina


Abstract
The two-way shape memory effect (TWSME) induced by pseudoelastic cycling in Cu-Zn-Al single crystals has been studied. We analyzed the influence of the mechanical cycling characteristics (tensile or compressing) and of the presence of [MATH]-phase precipitates in the material. The two-way memory effect induced by compressing cycling appears after a smaller number of cycles than in tensile pseudoelastic cycling. The presence of [MATH]-phase precipitates also reduces the number of cycles needed to get the TWSME. Samples with TWSME are able to overcome some external stress when going to the martensitic shape until a threshold stress, [MATH], value is reached. When higher opposing stresses are applied, the degradation of TWSME starts.



© EDP Sciences 1991