Crystallographic fatigue crack growth in nimonic AP1

J.E. King*

*Corresponding author for this work

    Research output: Contribution to journalArticle


    Recently a controversy has developed over whether crystallographic crack growth near threshold in nickel-base superalloys occurs along right brace 111 left brace slip planes or right brace 100 left brace planes at room temperature. In this work crack propagation is shown to occur on both right brace 100 left brace and right brace 111 left brace planes. The most common facet plane is right brace 111 left brace and this is the only orientation observed at the lowest stress intensities, but at higher stress intensities occasional right brace 100 left brace facets are also produced. This behavior is compared with similar results in aluminum alloys.
    Original languageEnglish
    Pages (from-to)311-320
    Number of pages10
    JournalFatigue of Engineering Materials and Structures
    Issue number4
    Publication statusPublished - Oct 1981



    • microstructures metallography
    • microscopic examination
    • crack propagation nickel and alloys
    • thermal effects powder metallurgy
    • superalloys stresses
    • crystals

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