Abstract—
The results of measuring the deformation of products manufactured by methods of additive technologies are presented. The process of searching for and determining subsurface delamination and inconsistency defects by a contactless optical method based on shearography is shown. This method works on the principles of interferometry and holography. The slightest displacement of the surface can be measured with it with an accuracy on the order of the wavelength of light. A calibration device that reproduced the surface deformation was used to adjust the shearograph. The results of experimental studies show high sensitivity to small deformations of products, which is approximately 0.2 µm.
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Funding
This work was supported by the Ministry of Education and Science of the Russian Federation within the framework of the implementation of the agreement No. 14.625.21.0041 of September 26, 2017 (unique identifier RFMEFI62517X0041).
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Ivanov, A.D., Minaev, V.L. & Vishnyakov, G.N. A Shearograph for Nondestructive Testing of Products Obtained by Additive Technologies. Instrum Exp Tech 62, 871–875 (2019). https://doi.org/10.1134/S0020441219060174
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DOI: https://doi.org/10.1134/S0020441219060174