Electromagnetic Acoustic Transducers (EMATs) allow non-contact ultrasonic measurements in order to characterize structures for a wide range of applications. Considering non-ferromagnetic metal materials, excitation of elastic waves is due to Lorentz forces that result from an applied magnetic field and induced eddy currents in a near surface region of the sample. EMAT’s design is based on a magnet structure associated with a coil leading to multiple configurations, which are able to excite bulk and guided acoustic waves. In this work, we first present a self-developed EMAT system composed of multiple emission and reception channels. In a second part, we propose an original method in order to determine the elastic constants of an isotropic material. To achieve this goal, Rayleigh and shear waves are used and the advantages of this method are clearly highlighted. The results obtained are then compared with conventional measurements achieved with piezoelectric transducers.
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20 April 2018
44TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLUME 37
16–21 July 2017
Provo, Utah, USA
Research Article|
April 20 2018
An original approach to elastic constants determination using a self-developed EMAT system
Frédéric Jenot;
Frédéric Jenot
a)
1
Univ. Valenciennes, CNRS, Univ. Lille, ISEN
, Centrale Lille, UMR 8520 - IEMN Institut d’Electronique de Microélectronique et de Nanotechnologie, DOAE - Département d’Opto-Acousto-Electronique, F-59313 Valenciennes, France
a)Corresponding author: [email protected]
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Frédéric Rivart;
Frédéric Rivart
1
Univ. Valenciennes, CNRS, Univ. Lille, ISEN
, Centrale Lille, UMR 8520 - IEMN Institut d’Electronique de Microélectronique et de Nanotechnologie, DOAE - Département d’Opto-Acousto-Electronique, F-59313 Valenciennes, France
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Liévin Camus
Liévin Camus
1
Univ. Valenciennes, CNRS, Univ. Lille, ISEN
, Centrale Lille, UMR 8520 - IEMN Institut d’Electronique de Microélectronique et de Nanotechnologie, DOAE - Département d’Opto-Acousto-Electronique, F-59313 Valenciennes, France
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a)Corresponding author: [email protected]
AIP Conf. Proc. 1949, 230018 (2018)
Citation
Frédéric Jenot, Frédéric Rivart, Liévin Camus; An original approach to elastic constants determination using a self-developed EMAT system. AIP Conf. Proc. 20 April 2018; 1949 (1): 230018. https://doi.org/10.1063/1.5031665
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