Numéro
J. Phys. Colloques
Volume 43, Numéro C4, Décembre 1982
ICOMAT-82
International Conference on Martensitic Transformations
Page(s) C4-685 - C4-689
DOI https://doi.org/10.1051/jphyscol:19824111
ICOMAT-82
International Conference on Martensitic Transformations

J. Phys. Colloques 43 (1982) C4-685-C4-689

DOI: 10.1051/jphyscol:19824111

INTERNAL FRICTION OF SINGLE AND POLYVARIANT MARTENSITES OF Cu-Zn-Al

M. Morin, G. Guénin et P.F. Gobin

Groupe d'Etudes de Métallurgie Physique et de Physique des Matériaux, L.A. 341, Institut National des Sciences Appliquées, Bâtiment 502, 69621 Villeurbanne Cedex, France


Abstract
The alloys which exhibit a thermoelastic martensitic transformation are generally characterised by a high damping in the martensitic phase. In the case of 18R faulted martensites, two explanations can be proposed : the movement of the interfaces between the variants or the movement of the partial dislocations present at the edge of the faults. These movements can be both detected by electron microscopy. To cut between these two hypothesis, the internal friction of a single then polyvariant martensite has been measured. A very low internal friction is obtained in the martensite single variant whereas high internal friction is as usually obtained for the polyvariant one. This proves that the internal friction of martensite is probably due to the movement of interfaces between the variants.