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Research Letters in Materials Science
Volume 2008 (2008), Article ID 907895, 3 pages
Research Letter

Internal Vibrations of Edge Dislocation Dipoles

1Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic
2Institute of Plasma Physics, Academy of Science of Czech Republic, Za Slovankou 3, 182 21 Prague, Czech Republic

Received 12 June 2008; Accepted 8 July 2008

Academic Editor: Korukonda L. Murty

Copyright © 2008 J. J. Kratochvíl and F. Kroupa. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The resonance frequency of vibrations of dislocation dipoles in fatigued f.c.c. metals is found rather high, in the range of 100 GHz. Because of high attenuation of ultrasound in the GHz range, the contributions of these self-vibrations to degradation of the dipole structures could be expected only in thin layers.