| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-339 - C5-344 | |
| DOI | https://doi.org/10.1051/jphyscol:1981550 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-339-C5-344
DOI: 10.1051/jphyscol:1981550
1 Institut für Allgemeine Metallkunde und Metallphysik RWTH Aachen, F.R.G.
2 Institute of Fundamental Technological Research, Academy of Science, Warzawa, Poland
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-339-C5-344
DOI: 10.1051/jphyscol:1981550
ULTRASONIC INVESTIGATION OF THE DISLOCATION STRUCTURE IN PLASTICALLY DEFORMED COPPER
H. Schmidt1, D. Lenz1, E. Drescher2 et K. Lücke11 Institut für Allgemeine Metallkunde und Metallphysik RWTH Aachen, F.R.G.
2 Institute of Fundamental Technological Research, Academy of Science, Warzawa, Poland
Abstract
We have simultaneously measured the dislocation contributions to ultrasonic attenuation αD and reduction of sound velocity ƊvD/v between 10 and 200 MHz in deformed Cu. The samples were γ-irradiated in order to reduce the attenuation and extend the experimentally usable frequency range to higher frequencies. The results have been evaluated in terms of dislocation resonance damping. Quantitative data for the dislocation density and free dislocation loop length as function of ε have been derived both for dislocations in tangles and in the cell interior.