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Conference Papers Year : 2017

An original approach to elastic constants determination using a self-developed EMAT system

Abstract

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.

Dates and versions

hal-03462805 , version 1 (02-12-2021)

Identifiers

Cite

Frédéric Jenot, Frédéric Rivart, Liévin Camus. An original approach to elastic constants determination using a self-developed EMAT system. 44th Annual Conference on Review of Progress in Quantitative Nondestructive Evaluation (QNDE 2021), Jul 2017, Provo, UT, United States. pp.230018, ⟨10.1063/1.5031665⟩. ⟨hal-03462805⟩
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