Microstructural and environmental effects on fatigue crack propagation in duplex stainless steels

T.J. Marrow, J.E. King

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Fatigue crack initiation and propagation in duplex stainless steels are strongly affected by microstructure in both inert and aggressive environments. Fatigue crack growth rates in wrought Zeron 100 duplex stainless steel in air were found to vary with orientation depending on the frequency of crack tip retardation at ferrite/austenite grain boundaries. Fatigue crack propagation rates in 3.5% NaCl solution and high purity water are increased by hydrogen assisted transgranular cyclic cleavage of the ferrite. The corrosion fatigue results are interpreted using a model for the cyclic cleavage mechanism.
    Original languageEnglish
    Pages (from-to)761-771
    Number of pages11
    JournalFatigue and Fracture of Engineering Materials and Structures
    Volume17
    Issue number7
    DOIs
    Publication statusPublished - Jul 1994

    Keywords

    • austenite
    • corrosion
    • corrosion fatigue
    • deformation
    • ferrites
    • grain boundaries
    • microstructure
    • models
    • sodium chloride
    • stainless steel
    • stresses
    • water
    • aggressive environment
    • crack tip retardation
    • fatigue crack propagation
    • hydrogen assisted transgranular cyclic cleavage
    • microstructural effects
    • wrought zeron 100
    • crack propagation

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