Laser ultrasonics and mode conversion for flaw depth gauging
| Autor: | FAËSE, Frédéric, Jenot, Frédéric, Ouaftouh, Mohammadi, Duquennoy, Marc, Ourak, Mohamed |
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| Přispěvatelé: | Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Proceedings of 13th International Symposium on Nondestructive Characterization of Materials, NDCM-XIII 13th International Symposium on Nondestructive Characterization of Materials, NDCM-XIII 13th International Symposium on Nondestructive Characterization of Materials, NDCM-XIII, 2013, Le Mans, France. paper 15509, 9 p |
| Popis: | Compared to earliest non destructive testing and evaluation methods based on transducers, laser ultrasonics shows specific advantages. It is a non-contact method combining a high spatial resolution and a large bandwidth, allowing high temperature and/or geometrically complex materials testing. In this work, ultrasonic waves are generated in an aluminium sample by a pulsed Nd:YAG laser in the thermoelastic mode. An interferometric optical probe is used to detect surface waves after their interaction with a flaw. This study will particularly focus on two Rayleigh waves. The first one is directly transmitted by the flaw whereas the second one is mode-converted from the head wave. Considering the relative amplitude of these two waves, experimental results lead to an original flaw depth gauging method. |
| Databáze: | OpenAIRE |
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