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Effect of electric current on the migration of hydrogen interstitial atoms in the region of a crack tip in a crystal

  • Defects, Dislocations, and Physics of Strength
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Abstract

The effect of a constant electric current on the migration of interstitial atoms dissolved in a crystal in the region of a tensile crack tip is estimated. The calculation takes into account plastic deformation that is produced in the vicinity of the crack tip in the loaded sample by dislocation motion in active slip planes of the crystal under the action of mechanically and electrically induced shear stresses, Joule heat release, the Thomson effect, and ponderomotive forces and allows for the effect of gas exchange near the crack edges on the evolution of the distribution of interstitial impurity atoms. The time dependence of the stress intensity factor is found for both the cases of the presence and absence of a constant electric current near the crack tip. Numerical calculations are performed for an α-Fe crystal.

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Authors and Affiliations

  1. Institute of Mechanics and Applied Mathematics, Rostov State University, pr. Stachki 200/1, Rostov-on-Don, 344090, Russia

    D. N. Karpinskii & S. V. Sannikov

Authors
  1. D. N. Karpinskii
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  2. S. V. Sannikov
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__________

Translated from Fizika Tverdogo Tela, Vol. 45, No. 3, 2003, pp. 446–450.

Original Russian Text Copyright © 2003 by Karpinski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \), Sannikov.

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Karpinskii, D.N., Sannikov, S.V. Effect of electric current on the migration of hydrogen interstitial atoms in the region of a crack tip in a crystal. Phys. Solid State 45, 472–476 (2003). https://doi.org/10.1134/1.1562232

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  • DOI: https://doi.org/10.1134/1.1562232

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