Electronic speckle pattern shearing interferometry for nondestructive testing of thermal sprayed alloy coatings

Yueqiang Xue; David Kennedy; Emilia Mihaylova

doi:10.1117/12.605034

2 June 2005 Electronic speckle pattern shearing interferometry for nondestructive testing of thermal sprayed alloy coatings

Yueqiang Xue, David Kennedy, Emilia Mihaylova

Author Affiliations +

Proceedings Volume 5824, Opto-Ireland 2005: Nanotechnology and Nanophotonics; (2005) https://doi.org/10.1117/12.605034
Event: OPTO-Ireland, 2005, Dublin, Ireland

Abstract

Thermal sprayed coatings have wide engineering applications. There now exists a wide range of destructive and nondestructive testing (NDT) methods for surface coating inspections. This paper describes an application of Electronic Speckle Pattern Shearing Interferometry (ESPSI) for NDT of thermal sprayed surface coatings. In contrast to other conventional methods such as eddy current, ultrasonic or X-ray, ESPSI allows fast and large survey area inspection. Experimental results of shearographic measurements are presented. Thermal sprayed coatings were tested using ESPSI. Delaminations of the coatings were detected and the fringe patterns were captured using this method. It is shown that the shearography technique can be applied successfully to surface coating quality inspection and it is very effective for delamination detection.

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Yueqiang Xue, David Kennedy, and Emilia Mihaylova "Electronic speckle pattern shearing interferometry for nondestructive testing of thermal sprayed alloy coatings", Proc. SPIE 5824, Opto-Ireland 2005: Nanotechnology and Nanophotonics, (2 June 2005); https://doi.org/10.1117/12.605034

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