| Issue |
J. Phys. Colloques
Volume 42, Number C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-79 - C5-84 | |
| DOI | https://doi.org/10.1051/jphyscol:1981511 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-79-C5-84
DOI: 10.1051/jphyscol:1981511
Max-Planck Institut für Metallforschung, Institut für Physik, Heisenbergstr.1, D-7000 Stuttgart 80 and Institut für Theoretische und Angewandte Physik der Universität Stuttgart, F.R.G.
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-79-C5-84
DOI: 10.1051/jphyscol:1981511
DISLOCATION RELAXATION PEAKS IN TANTALUM, INTRINSIC AND IMPURITY DEPENDENT EFFECTS
U. Rodrian et H. SchultzMax-Planck Institut für Metallforschung, Institut für Physik, Heisenbergstr.1, D-7000 Stuttgart 80 and Institut für Theoretische und Angewandte Physik der Universität Stuttgart, F.R.G.
Abstract
Investigations of the dislocation relaxation peaks in high purity and oxygen doped tantalum single crystals were carried out in the temperature range between 20 K and 700 K. The observed effects can be divided into 3 groups : the hydrogen Snoek-Köster relaxation (αH) between 50 K - 250 K, the γ-relaxation between 350 K - 500 K, and an oxygen Snoek-Köster peak (S.K.P.) above 500 K for a measuring frequency of about 1 Hz. Only the effects above 300 K will be discussed here. The γ-relaxation consists of 2 subpeaks γ1 and γ2 which are related to the intrinsic dislocation motion and an interaction of dislocations with interstitial oxygen respectively. The S.K.P. is discussed with regard to a new suggestion of A. Seeger.