Test method for fatigue crack propagation along interface between ceramic coating and substrate

Y. Mutoh; Y. Miyashita; J. Q. Xu; D. Higuchi; M. Ohki

doi:10.1117/12.429587

13 June 2001 Test method for fatigue crack propagation along interface between ceramic coating and substrate

Y. Mutoh, Y. Miyashita, J. Q. Xu, D. Higuchi, M. Ohki

Proceedings Volume 4317, Second International Conference on Experimental Mechanics; (2001) https://doi.org/10.1117/12.429587
Event: Second International Conference on Experimental Mechanics, 2000, Singapore, Singapore

Abstract

Ceramic thermal barrier coatings (TBC) are increasing applied to high temperature structures such as gas-turbine components. Spalling is one of serious damage mode of TBC, which includes fatigue crack initiation and propagation along the interface. In the present study, a new test method for realizing fatigue crack initiation and propagation along the interface has been successfully developed. From the results of fatigue crack growth test and boundary element method analysis, it has been found that is K₁ equals (root) K₁² + K₂² a suitable parameter for evaluating crack growth behavior of an interface crack under mix mode.

Citation Download Citation

Y. Mutoh, Y. Miyashita, J. Q. Xu, D. Higuchi, and M. Ohki "Test method for fatigue crack propagation along interface between ceramic coating and substrate", Proc. SPIE 4317, Second International Conference on Experimental Mechanics, (13 June 2001); https://doi.org/10.1117/12.429587

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