| 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) | C10-183 - C10-186 | |
| DOI | https://doi.org/10.1051/jphyscol:19851042 | |
Eighth International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 46 (1985) C10-183-C10-186
DOI: 10.1051/jphyscol:19851042
Laboratory of Crystal Physics, Faculty of Science, Hiroshima University, Hiroshima, Japan
J. Phys. Colloques 46 (1985) C10-183-C10-186
DOI: 10.1051/jphyscol:19851042
AMPLITUDE-DEPENDENT INTERNAL FRICTION OF ZONE-REFINED ALUMINUM
T. KOSUGI and T. KINOLaboratory of Crystal Physics, Faculty of Science, Hiroshima University, Hiroshima, Japan
Abstract
The state of impurity atoms in a high purity aluminum (99.9999 %) was studied by applied strain (ε) dependence of internal friction (Ɗ) at 4.2 K (Ɗ-ε curve) and temperature dependence of ε under a constant Ɗ at 2 - 12 K (ε-T curve). The binding energy U0 between a dislocation and an impurity atom is determined as 0.08 eV from ε-T curve assuming the Cottrell type force-distance relation. Pinning concentration of impurity atoms on the dislocation lines is also estimated from Ɗ-ε curve and U0, and found to be enhanced 50 times as large as bulk concentration. The value is consistent with U0 by considering the Cottrell atmosphere.