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Trapping of Hydrogen by Structural Defects in α-Iron

  • E. M. Riecke

Abstract

The anomalous diffusivity of hydrogen in cold-worked iron at low temperatures is due to the attractive interactions between dissolved hydrogen and structural imperfections produced by the deformation. Since hydrogen atoms occupying interstitial sites expand the host lattice, crystal defects such as vacancies, dislocations and interfaces trap hydrogen and affect thus the mobility of hydrogen atoms in the iron lattice. Effusion measurements, therefore, under conditions in which hydrogen diffusion is the rate determining process, yield information concerning the trapping reaction and the binding energy for hydrogen trapped by lattice defects.

Keywords

Pure Iron Hydrogen Diffusion Anomalous Diffusivity Iron Lattice Trap Hydrogen 
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Literature

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    A. McNabb; P.K. Foster: Trans. Metallurg. Soc. AIME 227 (1963), S. 618/27Google Scholar
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    A.J. Kumnick; H.H. Johnson: Met. Trans. 5 (1974), S. 1199/1206Google Scholar
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    Th. Heumann; E. Domke: International meeting on hydrogen in metals, Jülich (1972), vol. 2, S. 492/515Google Scholar
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    R.A. Oriani: Acta Met. 18 (1970), S. 147/57CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • E. M. Riecke
    • 1
  1. 1.Max-Planck-Institut für Eisenforschung GmbHDüsseldorfGermany

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