11 November 1999 Shearography as thermomechanical sensor for thermal stress determination of coatings at high temperatures
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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.
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Khaled J. Habib, 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); doi: 10.1117/12.369339; https://doi.org/10.1117/12.369339
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