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Effects of water vapor on hydrogen induced slow crack growth in stainless steels

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Abstract

Three types of stainless steel—austenitic, ferritic, duplex—were subjected to sustained load crack propagation tests in moist hydrogen gas. Three-stage crack velocity vs stress intensity behavior was observed for the unstable austenite alloy just as for pure hydrogen gas tests. Moisture essentially eliminated this behavior for the ferritic and duplex alloys. The fractographic features of all specimens failed in moist hydrogen are very similar to those for pure hydrogen. There is a continuous transition from brittle to ductile fracture appearance in the range from 25 °C to 100 °C. These results are rationalized on the basis of an inhibition of hydrogen entry into the metal due to H2O.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan

    T-P. Perng (Associate Professor)

  2. Department of Materials Science and Engineering and the Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1304 West Green Street, 61801, Urbana, IL

    C. J. Altstetter (Professor of Physical Metallurgy)

Authors
  1. T-P. Perng
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  2. C. J. Altstetter
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Formerly Postdoctoral Research Associate, Department of Metallurgy, University of Illinois in Urbana-Champaign

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Perng, TP., Altstetter, C.J. Effects of water vapor on hydrogen induced slow crack growth in stainless steels. Metall Trans A 19, 651–656 (1988). https://doi.org/10.1007/BF02649279

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  • DOI: https://doi.org/10.1007/BF02649279

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