CHANGEMENTS DE PHASES ET MICROSTRUCTURES
J. Phys. IV France 04 (1994) C3-151-C3-156
[MATH] precipitates in [MATH] Cu-based shape memory alloys : influence on the martensitic transformation and the thermal and pseudoelastic cyclingJ. PONS1 and E. CESARI2
1 Lab. Métallurgie Structurale, ENSCP, 11 rue Pierre et Marie Curie, 75231, Paris cedex 05, France
2 Dept. de Fisica, Universitat de les Illes Balears, Ctra. de Valldemossa km 7.5, 07071 Palma de Mallorca, Spain
The effect of different distributions of [MATH]-phase precipitates on the martensitic transformation of [MATH] Cu-Zn-Al single crystals is reviewed. The changes of transformation temperatures brought about by the precipitates are related to the changes of the free energy terms included in the thermoelastic balance. In the same way, the evolution of the transformation in samples containing precipitates submitted to thermal and pseudoelastic cycling will be also discussed. In some cases, the presence of precipitates improves the behaviour of the material under cycling.
© EDP Sciences 1994