| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-381 - C5-386 | |
| DOI | https://doi.org/10.1051/jphyscol:1981557 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-381-C5-386
DOI: 10.1051/jphyscol:1981557
Institut für Allgemeine Metallkunde und Metallphysik, RWTH Aachen, F.R.G.
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-381-C5-386
DOI: 10.1051/jphyscol:1981557
EVALUATION OF DISLOCATION PINNING EFFECTS FROM SIMULTANEOUS MEASUREMENTS OF ATTENUATION AND SOUND VELOCITY IN COPPER
D. Lenz, K. Lücke et H. SchmidtInstitut für Allgemeine Metallkunde und Metallphysik, RWTH Aachen, F.R.G.
Abstract
The frequency dependence (10 to 200 MHz) of the sound velocity and of the ultrasonic attenuation α has been measured on high purity Cu during 3 MeV γ-irradiation at room temperature. The results are evaluated with respect to dislocation effects which under the present conditions cause the major contributions to the frequency dependent reduction of sound velocity ƊvD/vo and attenuationαD. The γ-dose dependence of ƊvD/vo and αD is in complete accordance with the Granato-Lücke theory of dislocation resonance damping. It is shown that simultaneous measurements of ƊvD/vo and αD strongly improve the accuracy of MHz-investigations of dislocation damping effects.