Characterization of the Creep Deformation and Rupture Behavior of DS GTD-111 Using the Kachanov-Rabotnov Constitutive Model

    Authors

    C. M. Stewart; A. P. Gordon; E. A. Hogan;A. Saxena

    Comments

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    Abbreviated Journal Title

    J. Eng. Mater. Technol.-Trans. ASME

    Keywords

    creep; material modeling; constitutive modeling; creep damage; directionally solidified; DS GTD-111; temperature dependence; life; prediction; tertiary; SUPERALLOY GTD-111; Engineering, Mechanical; Materials Science, Multidisciplinary

    Abstract

    Creep deformation and rupture experiments are conducted on samples of the Ni-base superalloy directionally solidified GTD-111 tested at temperatures between 649 degrees C and 982 degrees C and two orientations (longitudinally and transversely oriented). The secondary creep constants are analytically determined from creep deformation experiments. The classical Kachanov-Rabotnov model for tertiary creep damage is implemented in a general-purpose finite element analysis (FEA) software. The simulated annealing optimization routine is utilized in conjunction with the FEA implementation to determine the creep damage constants. A comparison of FEA and creep deformation data demonstrates high accuracy. Using regression analysis, the creep constants are characterized for temperature dependence. A rupture prediction model derived from creep damage evolution is compared with rupture experiments. [DOI: 10.1115/1.4003111]

    Journal Title

    Journal of Engineering Materials and Technology-Transactions of the Asme

    Volume

    133

    Issue/Number

    2

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    11

    WOS Identifier

    WOS:000288807400013

    ISSN

    0094-4289

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