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    ASTM Round-Robin on Creep-Fatigue and Creep Behavior of P91 Steel

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    The American Society for Testing and Materials (ASTM), through its Committee E08 on Fatigue and Fracture subcommittee E08.05 on Creep-Fatigue Crack Formation, has recently developed a new standard for creep-fatigue testing (ASTM E2714-09). This paper describes the plans and preliminary results from a round-robin being presently conducted in support and verification of this new standard. The choice of the test material (ASTM Grade P91), the design of the round-robin test matrix, and a machining plan for the specimens are described. The results of microstructural analysis, tensile testing, and creep deformation and rupture testing are also presented along with some preliminary results from creep-fatigue testing. A new analytical model for representing the creep deformation characteristics of this material is also presented and evaluated using the creep data generated as part of the round-robin program. The results of the round-robin creep-fatigue testing will be used to make appropriate modifications to the test standard.


    creep-fatigue, crack formation, statistical data analysis, creep deformation and rupture

    Author Information:

    Kalyanasundaram, V.
    Univ. of Arkansas, Fayetteville, AR

    Saxena, A.
    Univ. of Arkansas, Fayetteville, AR

    Narasimhachary, S.
    Univ. of Arkansas, Fayetteville, AR

    Dogan, B.
    EPRI, Charlotte, NC

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP49933S