| Numéro |
J. Phys. Colloques
Volume 48, Numéro C8, Décembre 1987
Fifth European Conference on Internal Friction and Ultrasonic Attenuation in Solids
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| Page(s) | C8-553 - C8-558 | |
| DOI | https://doi.org/10.1051/jphyscol:1987887 | |
J. Phys. Colloques 48 (1987) C8-553-C8-558
DOI: 10.1051/jphyscol:1987887
THE INFLUENCE OF MARTENSITE STABILISATION ON CHANGES IN DISLOCATION DENSITY IN Cu-Zn-Al ALLOY
J. ILCZUK1, L. DELAEY2 et J. VAN HUMBEECK21 Institute of Physics and Chemistry of Metals, Silesian University, Bankowa 12, PL-40-007 Katowice, Poland
2 Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, de Croylaan 2, B-3030 Heverlee-Leuven, Belgium
Résumé
On a examiné l'alliage Cu-Zn-Al avec l'effet de mémoire de
forme, utilisant la méthode du frottement interne. En étudiant les dépendances
d'amplitude du frottement interne on a constaté que pendant la stabilisation de
la martensite la température ambiante, la densité et la mobilité des
dislocations augmentent la présence des lacunes trempées.
Abstract
From analysis of the amplitude dependence of internal
friction for Cu-Zn-Al alloy exhibiting the shape memory effect, the changes
taking place in the structure of the martensite during ageing at room
temperature were determined. It was ascertained that during stabilisation of
the martensite, both the density and mobility of dislocations increase due to
the presence in the martensite of a substantial concentration of quenched-in
vacancies.