| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-151 - C5-156 | |
| DOI | https://doi.org/10.1051/jphyscol:1981523 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-151-C5-156
DOI: 10.1051/jphyscol:1981523
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) C5-151-C5-156
DOI: 10.1051/jphyscol:1981523
INFLUENCE OF PLASTIC DEFORMATION ON THE TEMPERATURE DEPENDENCE OF ULTRASONIC ATTENUATION IN COPPER SINGLE CRYSTALS
J. Schulz et D. LenzInstitut für Allgemeine Metallkunde und Metallphysik, RWTH Aachen, F.R.G.
Abstract
The influence of plastic deformation (O<ε <10%) on the MHz-ultrasonic attenuation α in single crystals of pure Cu, Cu50ppmAu and Cu130ppmAu has been measured over the temperature range 4<T<300K. The major contributions to the total attenuation originate from dislocation resonance, double-kink relaxation, phonon-electron interaction (at T<50K) and non-dislocation effects which are discussed especially with respect to the separation of dislocation resonance and dislocation relaxation contributions. For the activation quantities of Bordini relaxation we obtain [MATH] = 0.105 ± 0.005 eV, τ = (1.2 ± 0.4) x 10-12s.