| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-327 - C5-337 | |
| DOI | https://doi.org/10.1051/jphyscol:1981549 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-327-C5-337
DOI: 10.1051/jphyscol:1981549
1 Institut für Allgemeine Metallkunde und Metallphysik, RWTH Aachen, F.R.G.
2 Physics Department and Materials Research Laboratory, University of Illinois at Urbana Champaign, Illinois, U.S.A.
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-327-C5-337
DOI: 10.1051/jphyscol:1981549
THE RIGID ROD MODEL OF DISLOCATION RESONANCE INCLUDING APPLICATIONS TO POINT DEFECT DRAG
K. Lücke1 et A.V. Granato21 Institut für Allgemeine Metallkunde und Metallphysik, RWTH Aachen, F.R.G.
2 Physics Department and Materials Research Laboratory, University of Illinois at Urbana Champaign, Illinois, U.S.A.
Abstract
The rigid rod model of dislocation motion is used to unify, simplify and clarify various types of theories of dislocation damping effects. It leads to a simple Debye-type relaxation process for overdamped resonance. Deviations from the rigid rod phenomenological formalism are found in cases where restoring or viscous forces act at discrete points rather than continuously, and they are evaluated by comparisons with exact solutions. The deviations are found to lead generally to corrections which are smaller than other uncertainties, except for the case of point defect drag with very small pinning point densities. This establishes the range of validity of the rigid rod model.