Fatigue crack propagation mechanisms in a thermally aged duplex stainless steel

T.J. Marrow, J.E. King

    Research output: Contribution to journalArticle

    Abstract

    Zeron 100 duplex stainless steel is susceptible to embrittlement following ageing at temperatures between 350 °C and 450 °C. The embrittlement is associated with cleavage of the age-hardened ferrite phase, initiated by deformation twinning. This can result in order of magnitude increases in the fatigue crack propagation rate. The effects of ageing on the mechanisms of fatigue crack propagation in Zero 100 are investigated, and a quantitative model is developed, accounting for the effects of hardness, temperature, stress level and microstructure on the fatigue crack growth rate. © 1994.
    Original languageEnglish
    Pages (from-to)91-101
    Number of pages11
    JournalMaterials Science and Engineering A
    Volume183
    Issue number1-2
    DOIs
    Publication statusPublished - 15 Jun 1994

    Keywords

    • aging of materials
    • crack propagation
    • deformation
    • embrittlement
    • fatigue of materials
    • ferrite
    • hardness
    • mathematical models
    • metallographic microstructure
    • stresses
    • thermal effects
    • twinning
    • cleavage
    • ferrite phase
    • thermal aging
    • Zeron 100 duplex steel
    • ageing
    • fatigue cracks
    • stainless steel

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