Detachment of dislocations from weak attachment points under the action of a periodic external stress is considered with defect diffusion along dislocations being possible. The expression obtained for the probability of detachment is studied numerically for various amplitudes and durations of the external stress at various concentrations and strengths of the attachment points. Attachment point diffusion increases the probability of detachment, while as the interaction between the dislocation and the point defect increases, the influence of that phenomenon increases as well. Change in the probability of detachment during the excitation process should lead to time dependence of hysteresis-type dislocation internal friction.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
C. Bauer, Contemporary Problems in Dislocation Theory [Russian translation], Mir, Moscow (1968), p. 98.
I. T. Suprun, Fiz. Met. Metalloved.,59, No. 4, 661 (1985).
A. Granato and K. Luecke, Ultrasound Methods for Dislocation Study [Russian translation], IL., Moscow (1963), p. 27.
D. H. Rogers, J. Appl. Phys.,33, No. 3, 781 (1962).
I. T. Suprun, Phys. Status Solidi (a),74, No. 2, 411 (1982).
E. K. Naimi and I. T. Suprun, Izv. Vyssh. Uchebn. Zaved., Fiz., No. 6, 114 (1984).
I. T. Suprun, Fiz. Met. Metalloved.,44, No. 1, 90 (1977).
K. Yamafuji and C. Bauer, Contemporary Problems in Dislocation Theory [Russian translation], Mir, Moscow (1968), p. 115.
M. A. Krishtal and S. A. Golovin, Internal Friction and Metal Structure [in Russian], Metallurgiya, Moscow (1976), p. 376.
Translated from Izvestiya Vysshikh Uchebnykh Zavednii, Fizika, No. 5, pp. 24–28, May, 1989.
About this article
Cite this article
Suprun, I.T. Dislocation detachment from weak attachment points. Soviet Physics Journal 32, 339–343 (1989). https://doi.org/10.1007/BF00895312
- Time Dependence
- Point Defect
- Internal Friction
- External Stress
- Attachment Point