| Issue |
J. Phys. Colloques
Volume 42, Number C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-49 - C5-54 | |
| DOI | https://doi.org/10.1051/jphyscol:1981506 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-49-C5-54
DOI: 10.1051/jphyscol:1981506
1 Max-Planck-Institut für Metallforschung, Institut für Physik, Heisenbergstr. 1, D-7000 Stuttgart 1 and Institut für Theoretische und Angewandte Physik der Universität Stuttgart, F.R.G.
2 Max-Planak-Institut für Metallforschung, Institut für Physik, Heisenbergstr. 1, D-7000 Stuttgart 1 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) C5-49-C5-54
DOI: 10.1051/jphyscol:1981506
DISLOCATION RELAXATION PEAKS IN MOLYBDENUM
R. Grau1 et H. Schultz21 Max-Planck-Institut für Metallforschung, Institut für Physik, Heisenbergstr. 1, D-7000 Stuttgart 1 and Institut für Theoretische und Angewandte Physik der Universität Stuttgart, F.R.G.
2 Max-Planak-Institut für Metallforschung, Institut für Physik, Heisenbergstr. 1, D-7000 Stuttgart 1 and Institut für Theoretische und Angewandte Physik der Universität Stuttgart, F.R.G
Abstract
In high purity molybdenum single crystals measurements of the damping and modulus are reported in the temperature range of the α and γ-relaxation. Activation volumes of the α-subpeaks were determined from the amplitude dependence of the Internal Friction. The results clearly support the explanation of the α-relaxation in terms of kink pair fromation in 71°-dislocations and diffusion of different types of geometrical kinks in screw dislocations. Deformation induced point defects interact with these dislocation segments giving rise to the β-relaxation. Some characteristics of the γ-peak (kink pair formation on screw dislocations) are discussed.