Temperature effects on the mechanism of time independent hydrogen assisted fatigue crack propagation in steels

T.J. Marrow, P.J. Cotterill, J.E. King

    Research output: Contribution to journalArticle

    Abstract

    The effects of temperature on hydrogen assisted fatigue crack propagation are investigated in three steels in the low-to-medium strength range; a low alloy structural steel, a super duplex stainless steel, and a super ferritic stainless steel. Significant enhancement of crack growth rates is observed in hydrogen gas at atmospheric pressure in all three materials. Failure occurs via a mechanism of time independent, transgranular, cyclic cleavage over a frequency range of 0.1-5 Hz. Increasing the temperature in hydrogen up to 80°C markedly reduces the degree of embrittlement in the structural and super ferritic steels. No such effect is observed in the duplex stainless steel until the temperature exceeds 120°C. The temperature response may be understood by considering the interaction between absorbed hydrogen and micro-structural traps, which are generated in the zone of intense plastic deformation ahead of the fatigue crack tip. © 1992.

    Original languageEnglish
    Pages (from-to)2059-2068
    Number of pages10
    JournalActa Metallurgica et Materialia
    Volume40
    Issue number8
    DOIs
    Publication statusPublished - Aug 1992

    Fingerprint

    Fatigue crack propagation
    Thermal effects
    Hydrogen
    Stainless steel
    Steel
    Ferritic steel
    Temperature
    Embrittlement
    Crack tips
    Atmospheric pressure
    Crack propagation
    Plastic deformation
    Gases

    Keywords

    • crack propagation
    • fatigue of materials
    • Hydrogen embrittlement
    • stainless steel
    • hydrogen assisted fatigue crack propagation thermal effects
    • low alloy structural steel
    • super duplex stainless steel
    • super ferritic stainless steel

    Cite this

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    abstract = "The effects of temperature on hydrogen assisted fatigue crack propagation are investigated in three steels in the low-to-medium strength range; a low alloy structural steel, a super duplex stainless steel, and a super ferritic stainless steel. Significant enhancement of crack growth rates is observed in hydrogen gas at atmospheric pressure in all three materials. Failure occurs via a mechanism of time independent, transgranular, cyclic cleavage over a frequency range of 0.1-5 Hz. Increasing the temperature in hydrogen up to 80°C markedly reduces the degree of embrittlement in the structural and super ferritic steels. No such effect is observed in the duplex stainless steel until the temperature exceeds 120°C. The temperature response may be understood by considering the interaction between absorbed hydrogen and micro-structural traps, which are generated in the zone of intense plastic deformation ahead of the fatigue crack tip. {\circledC} 1992.",
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    author = "T.J. Marrow and P.J. Cotterill and J.E. King",
    year = "1992",
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    Temperature effects on the mechanism of time independent hydrogen assisted fatigue crack propagation in steels. / Marrow, T.J.; Cotterill, P.J.; King, J.E.

    In: Acta Metallurgica et Materialia, Vol. 40, No. 8, 08.1992, p. 2059-2068.

    Research output: Contribution to journalArticle

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    T1 - Temperature effects on the mechanism of time independent hydrogen assisted fatigue crack propagation in steels

    AU - Marrow, T.J.

    AU - Cotterill, P.J.

    AU - King, J.E.

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    AB - The effects of temperature on hydrogen assisted fatigue crack propagation are investigated in three steels in the low-to-medium strength range; a low alloy structural steel, a super duplex stainless steel, and a super ferritic stainless steel. Significant enhancement of crack growth rates is observed in hydrogen gas at atmospheric pressure in all three materials. Failure occurs via a mechanism of time independent, transgranular, cyclic cleavage over a frequency range of 0.1-5 Hz. Increasing the temperature in hydrogen up to 80°C markedly reduces the degree of embrittlement in the structural and super ferritic steels. No such effect is observed in the duplex stainless steel until the temperature exceeds 120°C. The temperature response may be understood by considering the interaction between absorbed hydrogen and micro-structural traps, which are generated in the zone of intense plastic deformation ahead of the fatigue crack tip. © 1992.

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    KW - Hydrogen embrittlement

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    KW - hydrogen assisted fatigue crack propagation thermal effects

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    KW - super duplex stainless steel

    KW - super ferritic stainless steel

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