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    The effect of morphology of thermally grown oxide on the stress field in a turbine blade with thermal barrier coatings

    Access Status
    Fulltext not available
    Authors
    Zhu, W.
    Cai, M.
    Yang, L.
    Guo, J.
    Zhou, Y.
    Lu, Chunsheng
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Zhu, W. and Cai, M. and Yang, L. and Guo, J. and Zhou, Y. and Lu, C. 2015. The effect of morphology of thermally grown oxide on the stress field in a turbine blade with thermal barrier coatings. Surface & Coatings Technology. 276: pp. 160-167.
    Source Title
    Surface & Coatings Technology
    DOI
    10.1016/j.surfcoat.2015.06.061
    ISSN
    0257-8972
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/38275
    Collection
    • Curtin Research Publications
    Abstract

    To study the effect of morphology of thermally grown oxide on the stress distribution and evolution under cyclic thermal loading, a three-dimensional finite element model of a turbine blade with thermal barrier coatings is developed, in which the coating deposition process, high temperature creep and elastic–plastic behavior are taken into account. Based on the simulation results, dangerous regions in thermal barrier coatings can be predicted. It is shown that, during the cooling stage, tensile stress occurs at the peak of thermally grown oxide/bond coating interface, and compressive stress lies in the valley. With the increase of thickness and amplitude of thermally grown oxide, both the maximum tensile and compressive stresses increase, and the stress distribution is more sensitive to its amplitude than thickness.

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