| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-289 - C5-294 | |
| DOI | https://doi.org/10.1051/jphyscol:1981542 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-289-C5-294
DOI: 10.1051/jphyscol:1981542
Groupe d'Etudes de Métallurgie Physique et Physique des Matériaux, E.R.A. 463 I.N.S.A., Bât. 502 - 69621 Villeurbanne Cedex, France
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-289-C5-294
DOI: 10.1051/jphyscol:1981542
POINT DEFECT - DISLOCATION INTERACTION IN MgO
M. Gabbay, C. Esnouf, A. Vincent et G. FantozziGroupe d'Etudes de Métallurgie Physique et Physique des Matériaux, E.R.A. 463 I.N.S.A., Bât. 502 - 69621 Villeurbanne Cedex, France
Abstract
Amplitude Dependent Internal Friction has been measured from 77 K to 593 K in MgO single crystals plastically deformed at room temperature. Experimental results have been tested with several theoretical models of dislocation breakaway. A reliable value of interaction energy (0.5 eV) is deduced from the model of Teutonico, Granato and Lücke, but only a partial agreement between experimental results and the model is obtained. For that reason, a numerical analysis of thermomechanical breakaway has been undertaken.