Numéro
J. Phys. Colloques
Volume 48, Numéro C8, Décembre 1987
Fifth European Conference on Internal Friction and Ultrasonic Attenuation in Solids
Page(s) C8-541 - C8-546
DOI https://doi.org/10.1051/jphyscol:1987885
Fifth European Conference on Internal Friction and Ultrasonic Attenuation in Solids

J. Phys. Colloques 48 (1987) C8-541-C8-546

DOI: 10.1051/jphyscol:1987885

INTERNAL FRICTION OF Cu-Zn-Al SHAPE MEMORY ALLOYS ABOVE MARTENSITIC TRANSFORMATION

I.Z. HARANGOZÓ, F.J. KEDVES, S. KISS, M. HORDÓS, Z. CSERESNYÉS et G. POSGAY

Kossuth University, Department of Solid State Physics, PO Box 2, H-4010 Debrecen, Hungary


Abstract
The ability of the martensitic transformation of several Cu-Zn-Al alloys produced under industrial circumstances was studied in detail by internal friction and electrical resistance measurements performed mainly above the temperature range of the martensitic transformation. An internal friction peak was found at about 180°C in all alloys.The peak height decreased and the modulus increased during subsequent measuring or after an annealing aboye the peak temperature. At the same time this heat treatment above 180°C changed also the martensitic transformation ability.