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Dislocation Motion in Metals Investigated by Means of Pulsed Nuclear Magnetic Resonance

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Abstract

We report the first use of nuclear magnetic resonance to investigate dislocation motion in metals. The spin-lattice relaxation rate in the rotating frame T −11ρ , of 27Al in polycrystalline, ultrapure Aluminium foils has been measured as a function of plastic-deformation rate έ for two different temperatures (77K and 300K). For έ = 0, the relaxation rate is determined by conduction electrons. For a finite deformation rate έ, an additional contribution to the relaxation rate arising from fluctuations in the nuclear quadrupole interaction due to dislocation motion is observed. From the motion-induced part of the relaxation rate the mean jump distance of a mobile dislocation is calculated which is determined by the density of lattice defects acting as obstacles for moving dislocations.

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Authors and Affiliations

  1. Institute of Physics, University of Dortmund, 46, Dortmund-50, W. Germany

    H. Tamler, H. J. Hackelöer & O. Kanert

  2. Dept. of Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 18, 9747 AG, Groningen, The Netherlands

    W. H. M. Alsem & J. Th. M. de Hosson

Authors
  1. H. Tamler
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  2. H. J. Hackelöer
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  3. O. Kanert
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  4. W. H. M. Alsem
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  5. J. Th. M. de Hosson
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Tamler, H., Hackelöer, H.J., Kanert, O. et al. Dislocation Motion in Metals Investigated by Means of Pulsed Nuclear Magnetic Resonance. MRS Online Proceedings Library 3, 421 (1980). https://doi.org/10.1557/PROC-3-421

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  • DOI: https://doi.org/10.1557/PROC-3-421

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