| Numéro |
J. Phys. Colloques
Volume 46, Numéro C10, Décembre 1985
Eighth International Conference on Internal Friction and Ultrasonic Attenuation in Solids
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|---|---|---|
| Page(s) | C10-179 - C10-182 | |
| DOI | https://doi.org/10.1051/jphyscol:19851041 | |
J. Phys. Colloques 46 (1985) C10-179-C10-182
DOI: 10.1051/jphyscol:19851041
DISLOCATION-SOLUTE ATOM INTERACTION IN ALUMINUM STUDIED BY AMPLITUDE-DEPENDENT INTERNAL FRICTION
T. KOSUGI and T. KINOLaboratory of Crystal Physics, Faculty of Science, Hiroshima University, Hiroshima, Japan
Abstract
In order to get the information on the force-distance curve for the interaction between a dislocation and a solute atom, amplitude-dependent internal friction was measured at 1.7 - 30 K on Al-100 at ppm Zn and Al-50 at ppm Zn single crystals. The temperature dependence of applied strain under a constant decrement is the same for two concentrations with high accuracy. The data were analyzed by the thermally assisted break-away model for dislocations assuming several potential forms. In conclusion, a modified Cottrell expression is proposed, in which dislocation core structure is taken into account, and the model can explain the temperature dependence of applied strain satisfactorily. The core radius of dislocation is estimated to be about 3 Å.