J. Phys. IV France
Volume 01, Numéro C4, Novembre 1991EUROPEAN SYMPOSIUM ON MARTENSITIC TRANSFORMATION AND SHAPE MEMORY PROPERTIES
|Page(s)||C4-289 - C5-294|
J. Phys. IV France 01 (1991) C4-289-C5-294
THE THERMAL AGING AND TWO WAY MEMORY EFFECT (TWME) IN Cu-Al-Be SHAPE MEMORY ALLOYH. FLORES ZUNIGA1, 2, S. BELKAHLA1, 3 and G. GUÉNIN1
1 Groupe d'Etudes de Métallurgie Physique et Physique des Matériaux, INSA de Lyon, Av. Albert
2 On leave of absence from : Instituto de Investigaciones en Materiales, UNAM, Apdo. Postal 70-360, 04510 México, D.F., México.
3 On leave of absence from : Université d'Annaba, Institut de Physique, BP 12, Annaba, Algeria.
In this study T.T.P. (Temperature, Time, Precipitation) curves of β-Cu-Al-Be have been determined by Differential Scanning Calorimetry technique. This alloy have been found to shows a remarkable thermal stability. The training experiments and the obtained two way memory effect (TWME) have shown that this alloy exhibits a good ability to memory properties comparable to the ones obtained on Cu-Zn-Al and Cu-Al-Ni. The aging kinetics of TWME have been drawn for several temperatures. This work has confirmed the hypothesis already advanced concerning Cu-Zn-Al and Cu-Al-Ni alloys, namely that the TWME aging is mainly due to the dislocation recovery, and in this case is independent of the precipitation phenomenon.
© EDP Sciences 1991