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Article Dans Une Revue e-Journal of Nondestructive Testing Année : 2022

Ultrasonic characterization, simulation of porous metal in the interest of high frequency applications

Résumé

Today, research is set up to carry out studies on the ultrasonic characterization of porous metals in the interest of ultrasonic applications. In this work, the acoustic properties of several porous metals were investigated to be used as a backing material in ultrasonic transducers. Results in terms of celerity, acoustic impedance and attenuation are reported for porosity ranging from 25 % to 50 % with pore size ranging from 1.7 μm to 60 μm. The acoustic impedance of the porous material depends linearly on the porosity and can be described by a simple model of the homogenization of a fluid in a solid matrix. Results show that the acoustic attenuation strongly depends on the porosity and can reach 4.3 dB.mm-1 at 1 MHz which is suitable to be used as a backing material.
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Dates et versions

hal-04009108 , version 1 (01-03-2023)

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Dang-Chi Nguyen, Frédéric Navacchia, Louis-Pascal Tran-Huu-Hue, Guy Feuillard. Ultrasonic characterization, simulation of porous metal in the interest of high frequency applications. e-Journal of Nondestructive Testing, 2022, 27 (12), ⟨10.58286/27525⟩. ⟨hal-04009108⟩
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