You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass
    STP942

    Thermal Mechanical Fatigue of Cast René 80

    Published: 01 January 1988


      Format Pages Price  
    PDF (272K) 16 $25   ADD TO CART
    Complete Source PDF (27M) 1279 $271   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    Abstract

    Hot path components of aircraft engines contain complex thermal and mechanical fields which can interact to produce thermal mechanical fatigue (TMF) failure. Development of a model of thermal mechanical fatigue for cast René 80 is underway through TMF experiments, a series of isothermal tests, and finite element analysis. The modelling effort consists of two parts, the determination of a suitable damage parameter and a technique for calculating the quantities required by the damage parameter. Classical plasticity theory was employed in a finite element code to model the TMF deformation. The predicted hysteresis loops were compared to the experimental values; the correlation was excellent for both the in-phase and out-of-phase cycles at 871 to 982°C but not as good as 760 to 871°C. The thermal cycle variation in these tests is limited, but the model's ability to correlate the TMF lives and predict the constitutive behavior of a material whose behavior changes with temperature provides optimism that this analysis may be applied to other TMF situations.

    Keywords:

    nickel-base superalloy, elevated temperature fatigue, thermomechanical fatigue, fatigue life prediction, inelastic finite element analysis, cyclic constitutive behavior


    Author Information:

    Cook, TS
    General Electric Company, AEBG, Cincinnati, OH

    Kim, KS
    General Electric Company, AEBG, Cincinnati, OH

    McKnight, RL
    General Electric Company, AEBG, Cincinnati, OH


    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP24515S