Shearography as thermomechanical sensor for thermal stress determination of coatings at high temperatures

Khaled J. Habib

doi:10.1117/12.369339

11 November 1999 Shearography as thermomechanical sensor for thermal stress determination of coatings at high temperatures

Khaled J. Habib

Author Affiliations +

Proceedings Volume 3897, Advanced Photonic Sensors and Applications; (1999) https://doi.org/10.1117/12.369339
Event: International Symposium on Photonics and Applications, 1999, Singapore, Singapore

Abstract

In the present work, the thermo-mechanical behavior, temperature versus thermal deformation with respect to time, of different coating films were studied by a non-destructive technique known as shearography. Ceramic, i.e. Al₂O₃ as well as polymer, i.e. Epoxy, coatings on metallic alloys, i.e. carbon steels, were investigated at a temperature range simulating the severe weather temperatures in Kuwait especially between the daylight and the night time temperatures. The investigation focused on determining the in-plane displacement of the coating which amounts to the thermal deformation and stress with respect to temperature and time. Along with the experimental data, a mathematical relationship was derived describing the thermal deformation and stress of a coating film as a function of temperature. Furthermore, results of shearography indicate that the technique is very useful NDT method not only for determining the thermo-mechanical behavior of different coatings, but also the technique can be used as a 2D microscope for monitoring the deformation of the coatings in real-time at a microscopic scale.

Citation Download Citation

Khaled J. Habib "Shearography as thermomechanical sensor for thermal stress determination of coatings at high temperatures", Proc. SPIE 3897, Advanced Photonic Sensors and Applications, (11 November 1999); https://doi.org/10.1117/12.369339

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