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    Damage evolution and rupture time prediction in thermal barrier coatings subjected to cyclic heating and cooling: an acoustic emission method

    164384_164384.pdf (1.773Mb)
    Access Status
    Open access
    Authors
    Yang, L.
    Zhou, Y.
    Lu, Chungsheng
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Yang, Li and Zhou, Yi-chun and Lu, Chungsheng. 2011. Damage evolution and rupture time prediction in thermal barrier coatings subjected to cyclic heating and cooling: an acoustic emission method. Acta Materialia. 59 (17): pp. 6519-6529.
    Source Title
    Acta Materialia
    DOI
    10.1016/j.actamat.2011.06.018
    ISSN
    13596454
    School
    Department of Mechanical Engineering
    Remarks

    The original publication is available at http://www.springerlink.com

    URI
    http://hdl.handle.net/20.500.11937/23115
    Collection
    • Curtin Research Publications
    Abstract

    The real-time testing and quantitative assessment of damage evolution in thermal barrier coatings (TBCs) is desirable, but still intractable, especially at elevated temperature. In this paper, the fracture process of TBCs subjected to cyclic heating and cooling is monitored using an acoustic emission method. Based on the wavelet analysis of acoustic emission signals, damage modes in TBCs are discriminated. The results show that, due to thermal stress, it is preferential for vertical cracks in the heating stage and interface cracks in the cooling stage. The surface crack density and interface crack length are calculated to obtain the quantitative correlation of damage evolution in TBCs and acoustic emission parameters. The rupture time of TBCs can be predicted by the statistical analysis of acoustic emission signals.

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