| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-91 - C5-96 | |
| DOI | https://doi.org/10.1051/jphyscol:1981513 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-91-C5-96
DOI: 10.1051/jphyscol:1981513
Laboratoire de Physique des Solides, associé au C.N.R.S. (LA 74), Département de Physique, I.N.S.A., 31077 Toulouse Cedex, France
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-91-C5-96
DOI: 10.1051/jphyscol:1981513
THERMALLY ACTIVATED EVOLUTION OF THE DISLOCATION STRUCTURE GENERATED BY LOW TEMPERATURE DEFORMATION AND ASSOCIATED DAMPING PHENOMENA IN PURE IRON
P. Astie, J.P. Peyrade et P. GrohLaboratoire de Physique des Solides, associé au C.N.R.S. (LA 74), Département de Physique, I.N.S.A., 31077 Toulouse Cedex, France
Abstract
Internal friction spectra and microdeformation curves of low temperature deformed iron are shown. The two intrinsic relaxation peaks α and γ are related to the nucleation of double kinks on respectively non-screw and screw dislocations. The unexpected characteristics of the γ peak for an intrinsic dislocation peak are explained by the thermal instability of the screw dislocation network generated by low temperature deformation under the action of the internal stresses.