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An overview of using small punch testing for mechanical characterization of MCrAlY bond coats

Chen, Hao; Jackson, G.A.; Sun, Wei

Authors

Hao Chen

G.A. Jackson

Wei Sun



Abstract

Considerable work has been carried out on overlay bond coats in the past several decades because of its excellent oxidation resistance and good adhesion between the top coat and superalloy substrate in the thermal barrier coating systems. Previous studies mainly focus on oxidation and diffusion behavior of these coatings. However, the mechanical behavior and the dominant fracture and deformation mechanisms of the overlay bond coats at different temperatures are still under investigation. Direct comparison between individual studies has not yet been achieved due to the fragmentary data on deposition processes, microstructure and, more apparently, the difficulty in accurately measuring the mechanical properties of thin coatings. One of the miniaturized specimen testing methods, small punch testing, appears to have the potential to provide such mechanical property measurements for thin coatings. The purpose of this paper is to give an overview of using small punch testing to evaluate material properties and to summarize the available mechanical properties that include the ductile-to-brittle transition and creep of MCrAlY bond coat alloys, in an attempt to understand the mechanical behavior of MCrAlY coatings over a broad temperature range.

Journal Article Type Article
Publication Date Aug 1, 2017
Journal Journal of Thermal Spray Technology
Print ISSN 1059-9630
Electronic ISSN 1544-1016
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 26
Issue 6
APA6 Citation Chen, H., Jackson, G., & Sun, W. (2017). An overview of using small punch testing for mechanical characterization of MCrAlY bond coats. Journal of Thermal Spray Technology, 26(6), https://doi.org/10.1007/s11666-017-0593-y
DOI https://doi.org/10.1007/s11666-017-0593-y
Keywords creep; ductile-to-brittle transition; mechanical testing; MCrAlY bond coat; small punch
Publisher URL https://link.springer.com/article/10.1007/s11666-017-0593-y
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information The final publication is available at Springer via http://dx.doi.org/10.1007/s11666-017-0593-y

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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