| Numéro |
J. Phys. Colloques
Volume 44, Numéro C9, Décembre 1983
ECIFUAS-4Fourth European Conference on Internal Friction and Ultrasonic Attenuation in Solids / Quatrième Conférence Européenne sur le Frottement Intérieur et l'Atténuation Ultrasonore dans les Solides |
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|---|---|---|
| Page(s) | C9-619 - C9-625 | |
| DOI | https://doi.org/10.1051/jphyscol:1983993 | |
ECIFUAS-4
Fourth European Conference on Internal Friction and Ultrasonic Attenuation in Solids / Quatrième Conférence Européenne sur le Frottement Intérieur et l'Atténuation Ultrasonore dans les Solides
J. Phys. Colloques 44 (1983) C9-619-C9-625
DOI: 10.1051/jphyscol:1983993
1 Max-Planck-Institut für Metallforschung, Institut für Physik, Stuttgart, F.R.G.
2 Middle East Technical University, Ankara, Turkey
Fourth European Conference on Internal Friction and Ultrasonic Attenuation in Solids / Quatrième Conférence Européenne sur le Frottement Intérieur et l'Atténuation Ultrasonore dans les Solides
J. Phys. Colloques 44 (1983) C9-619-C9-625
DOI: 10.1051/jphyscol:1983993
THE THEORY OF STRAIN AMPLITUDE DEPENDENT DISLOCATION DAMPING IN THE PRESENCE OF UNIFORM POINT DEFECT DRAGGING
T.Ö. Ogurtani1, 2 et A. Seeger1, 21 Max-Planck-Institut für Metallforschung, Institut für Physik, Stuttgart, F.R.G.
2 Middle East Technical University, Ankara, Turkey
Abstract
The strain-amplitude and frequency-dependent internal friction due to movements of dislocations in the presence of uniform point defect dragging and randomly distributed, weak pinning obstacles is investigated using the string model. By making use of computer simulations with the catastrophic breakaway distribution function and uniform point defect dragging, the internal friction coefficient is obtained as a function of the stress amplitude, homologous temperature, driving frequency, and densities of the dragging point defects and the weak pinning obstacles.