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    Effect of nickel on the hydrogen stress cracking resistance of ferritic/pearlitic low alloy steels

    267788.pdf (2.331Mb)
    Access Status
    Open access
    Authors
    Husby, H.
    Wagstaff, P.
    Iannuzzi, Mariano
    Johnsen, Roy
    Kappes, M.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Husby, H. and Wagstaff, P. and Iannuzzi, M. and Johnsen, R. and Kappes, M. 2018. Effect of nickel on the hydrogen stress cracking resistance of ferritic/pearlitic low alloy steels. Corrosion. 74 (7): pp. 801-818.
    Source Title
    Corrosion
    DOI
    10.5006/2724
    ISSN
    0010-9312
    URI
    http://hdl.handle.net/20.500.11937/69742
    Collection
    • Curtin Research Publications
    Abstract

    Nickel additions to low alloy steels improve mechanical and technological properties. However, Part 2 of ISO Standard 15156 limits the nickel content to a maximum of 1 wt% in oil and gas environments containing H2S because of controversial concerns regarding sulfide stress cracking. The objective of this work was to investigate the effect of nickel in solid solution in the ferrite phase on hydrogen stress cracking resistance. Ferritic/pearlitic research-grade low alloy steels with nominal nickel contents of 0, 1, 2, and 3 wt% were tested by the slow strain rate test method with cathodic hydrogen charging to -1.05 VAg/AgCl and -2 VAg/AgCl. No difference in fracture mode or morphology was found between the alloys. However, the plastic elongation ratios and reduction in area ratios decreased with increasing nickel content when tested at -2 VAg/AgCl. The direct and indirect effects of nickel, such as the influence of an increasing fraction of pearlite with increasing nickel content, are discussed.

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