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    STP520

    Temperature Effects on the Strainrange Partitioning Approach for Creep Fatigue Analysis

    Published: 01 January 1973


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    Abstract

    Examination is made of the influence of temperature on the strain-range partitioning approach to creep fatigue. Results for 2¼Cr-1Mo steel and Type 316 stainless steel show the four partitioned strainrange-life relationships to be temperature insensitive to within a factor of two on cyclic life. Monotonic creep and tensile ductilities were also found to be temperature insensitive to within a factor of two.

    The approach provides bounds of cyclic life that can be readily established for any type of inelastic strain cycle. Continuous strain cycling results obtained over a broad range of high temperatures and frequencies are in excellent agreement with bounds provided by the approach.

    Keywords:

    fatigue (materials), creep-fatigue, strains, strainrange partitioning, creep properties, plastic properties, hysteresis, flow, fatigue failure, life prediction


    Author Information:

    Halford, GR
    Engineer, head, Fatigue Research Section, and chief, NASA-Lewis Research Center, Cleveland, Ohio

    Hirschberg, MH
    Engineer, head, Fatigue Research Section, and chief, NASA-Lewis Research Center, Cleveland, Ohio

    Manson, SS
    Engineer, head, Fatigue Research Section, and chief, NASA-Lewis Research Center, Cleveland, Ohio


    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP38877S