| Téléchargement | - Voir le manuscrit accepté : Laser-ultrasonic attenuation and absorption measurements in metals (PDF, 369 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1063/1.4716235 |
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| Auteur | Rechercher : Perton, M.1; Rechercher : Lévesque, D.1; Rechercher : Moreau, A.1; Rechercher : Lamouche, G.1; Rechercher : Monchalin, J.-P.1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut des matériaux industriels du CNRC
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| Format | Texte, Article |
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| Conférence | 38th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE), July 17-22, 2011, Burlington, VT, US |
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| Sujet | laser ultrasonics; ultrasonic absorption; scattering; diffusion regime; zero group velocity |
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| Résumé | The attenuation of an acoustic wavefront in metals comes from scattering caused by grain anisotropy and random grain orientation and from absorption caused by mechanisms such as dislocation and magnetic domain motion. In this paper laser ultrasonics, with its non-contact and broadband characteristics, is used for measuring and separating these two attenuation contributions as a function of frequency. Results obtained from the well-known pulse-echo method and reverberation technique are presented first. Then, a more recent approach using a time-frequency analysis with zerogroup velocity (ZGV) resonances is considered. It is shown that the attenuation with scattering and absorption components is obtained by fitting the temporal decay of the resonances of the coherent field, and that only the absorption component is obtained from the temporal decay of the diffuse field between resonances. |
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| Date de publication | 2011-07-17 |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro du CNRC | NRCC 54354 |
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| Numéro NPARC | 18968550 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | a5ccad3e-a6d6-4ed2-a26c-07176be45515 |
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| Enregistrement créé | 2011-11-25 |
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| Enregistrement modifié | 2020-06-09 |
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