When a material is subjected to a small mechanical load, it shows a small elastic deformation of the order of nanometer. If there is a crack on the surface or underneath the surface, small elastic deformation shows non-uniformity around the crack. In this study, a non-destructive crack detection method by nanometric change in material’s surface profile is proposed, and a tensile test of notched plate specimen was carried out. A non-uniform height change by mechanical load appeared near the notch. This fact suggests that the proposed method is available as an NDE method.
- Pressure Vessels and Piping Division
Non-Destructive Crack Detection by Nanometric Change in Surface Profile Using Digital Holographic Microscope
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Tada, N, Uchida, M, & Uenoyama, Y. "Non-Destructive Crack Detection by Nanometric Change in Surface Profile Using Digital Holographic Microscope." Proceedings of the ASME 2012 Pressure Vessels and Piping Conference. Volume 5: High-Pressure Technology; ASME NDE Division. Toronto, Ontario, Canada. July 15–19, 2012. pp. 251-257. ASME. https://doi.org/10.1115/PVP2012-78425
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