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Kinetic aspects of slow crack growth in the gaseous hydrogen embrittlement of steels

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Abstract

An explanation of the slow crack-growth phenomenon in gaseous hydrogen embrittlement is suggested on the basis that chemisorption is the rate-limiting step. The basis of the analysis is the existence of a mobile adsorbed species which is a prerequisite to the occurrence of slow crack growth. The disappearance of the mobile species with increasing temperature results in the observed crack-velocity dependence on temperature. The analysis is able to account qualitatively for the observed dependence of crack velocity with pressure in the different temperature regions of crack growth.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Iowa State University and Ames Laboratory, USDOE, 50011, Ames, Iowa, USA

    K. Sieradzki

  2. Department of Chemical Engineering and Materials Science, Syracuse University, 13200, Syracuse, New York, USA

    P. Ficalora

Authors
  1. K. Sieradzki
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  2. P. Ficalora
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Sieradzki, K., Ficalora, P. Kinetic aspects of slow crack growth in the gaseous hydrogen embrittlement of steels. J Mater Sci 14, 2703–2708 (1979). https://doi.org/10.1007/BF00610642

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  • DOI: https://doi.org/10.1007/BF00610642

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