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    STP942

    A Maximum Stress Modified Life Equation on the Basis of a Fatigue-Creep Interaction Map

    Published: 01 January 1988


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    Abstract

    The effects of maximum stress on crack initiation and propagation, the fracture life, and the dynamic creep rate have been studied on the basis of a fatigue-creep interaction fracture map. A number of maximum stress modified equations have been deduced to describe the complete interaction behavior of a large ESR-Cast-to-Shape superalloy disk under a wide range of fatigue and creep stress combinations at a constant temperature. All the observed fracture lives fall within a range of a factor of two of fracture lives predicted by these equations.

    Keywords:

    superalloy, fatigue, creep, fatigue-creep interaction, life prediction


    Author Information:

    Chen, GL
    Beijing University of Iron and Steel Technology, Beijing,

    He, QF
    Beijing University of Iron and Steel Technology, Beijing,

    Gao, L
    Beijing University of Iron and Steel Technology, Beijing,

    Zhang, SH
    Beijing University of Iron and Steel Technology, Beijing,


    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP24504S