Effects of microstructure on long and short crack growth in nickel base superalloys

C.W. Brown, J.E. King, M.A. Hicks

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The use of engineering materials in critical applications necessitates the accurate prediction of component lifetime for inspection and renewal purposes. In fatigue limited situations, it is necessary to be able to predict the growth rates of cracks from initiation at a defect through to final fracture. To this end, fatigue crack growth data are presented for different microstructures of typical nickel base superalloys used in gas turbine engines. Crack growth behaviour throughout the life history of the crack, i.e. from the short crack through to the long crack propagation regime, is described for each microstructural condition and discussed in terms of current theories of fatigue crack propagation.
    Original languageEnglish
    Pages (from-to)374-380
    Number of pages7
    JournalMetal Science
    Volume18
    Issue number7
    DOIs
    Publication statusPublished - Jul 1984

    Keywords

    • jet and turbine aircraft engines
    • microstructures nickel metallography
    • nickel chromium cobalt molybdenum alloys

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