Modelling short crack growth behaviour in nickel-base superalloys

L. Grabowski*, J.E. King

*Corresponding author for this work

    Research output: Contribution to journalArticle

    Abstract

    This paper provides a description of the features and mechanisms of facetted short crack growth in Ni-base superalloys, and briefly reviews existing short crack growth models in terms of their application to Ni-base alloys.
    The concept of “soft barriers” is introduced to produce a new two-phase model for local microstructural effects on short crack growth in Waspaloy. This is derived from detailed observations of crack growth through individual grains. The model differs from all previous approaches in highlighting the importance of crack path perturbations within grains. Potential applications of the model in alloy development are discussed.
    Original languageEnglish
    Pages (from-to)595-606
    Number of pages12
    JournalFatigue and Fracture of Engineering Materials and Structures
    Volume15
    Issue number6
    DOIs
    Publication statusPublished - Jun 1992

    Keywords

    • nickel and alloys
    • short crack growth
    • two-phase model
    • superalloys
    • mathematical models

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