J. Phys. IV France 01 (1991) C4-457-C4-462
TWO WAY SHAPE MEMORY EFFECT OBTAINED BY STABILISED STRESS INDUCED MARTENSITE IN Cu-Zn-Al-Co AND Cu-Al-Mn ALLOYSB.G. MELLOR1, J.M. GUILEMANY2 and J. FERNANDEZ2
1 Engineering Materials, University of Southampton, GB-Southampton SO9 5NH, Great-Britain
2 Metalurgia Fisica-Ciencia de los Materiales, Departamento de Ingenieria Quimica y Metalurgie, Facultad de Quimica, Universidad de Barcelona, SP-08028 Barcelona, Spain
Two way shape memory has been achieved in Cu-Zn-Al-Co and Co-Al-Mn alloys by a training process based on the stabilisation of stress induced martensite. The effect of training temperature on the amount of two way shape memory obtained has been studied by training at various temperatures of between 50 °C and 170 °C above the Af. After training the samples were thermally cycled various times (up to 100) through their martensitic transformation temperatures in the absence of applied stress to evaluate the degree of recovery of both the hot and cold shape and hence assess the two way shape memory effect. The results obtained showed that there existed an optimum training temperature at which maximum two way shape memory was observed.
© EDP Sciences 1991