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    Modeling of Deformation During TMF-Loading

    Published: 01 January 2003

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    The deformation behavior of two extremely different nickel base alloys under cyclic loading is reported and discussed with respect to the underlying micro-structural mechanisms. One is a high strength cast single crystal alloy and the other is a wrought carbide strengthened alloy with comparably low yield strength showing pronounced plasticity during cyclic deformation. A procedure for modeling of the deformation behavior is described that take this mechanism into account. It implies elastic deformation, yielding, and relaxation. For the low strength alloy, cyclic hardening is additionally accounted for. The modeling procedure, the evaluation of the necessary parameters from isothermal tests, and the predicted results for isothermal and anisothermal loading are compared with experimental results.


    thermal mechanical fatigue, TMF, low-cycle fatigue, LCF, nickel base alloy, deformation behavior, cyclic hardening, relaxation, modeling, simulation, hysteresis loop

    Author Information:

    Affeldt, EE
    MTU Aero Engines GmbH, Munich,

    Hammer, J
    Fachhochschule Regensburg, University of Applied Sciences, Regensburg,

    Cerdán de la Cruz, L
    MTU Aero Engines GmbH, Munich,

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP11424S