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Fundamentals of electromagnetic-acoustic-transformation thickness measurements with attachable probes: III. Inverse and double electromagnetic-acoustic transformation in a normal polarizing field

  • Acoustic Methods
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Abstract

Calculations are performed for projections of the induction of the secondary field in air, which appears after an inverse and double electromagnetic-acoustic transformation in a solid ferromagnetic conducting body via the induction and magnetic transformation mechanisms, for arbitrary values of this body’s macroscopic parameters and the radiation frequency lying in a quasi-stationary range. The experimental data obtained in measurements of the topography of the secondary field are compared to the calculation results, and their satisfactory agreement is shown. The presented calculated and experimental topography data show that, in the near radiation-field zone, shear waves propagate in the directions close to the normal to the object’s boundary and measured from the radiating elements. It is shown that, when the transmitter and receiver are spatially separated, the emf induced in the receiver is due to the peripheral part of the secondary field with a lower amplitude and a weaker dependence on the changes in the thicknesses of samples.

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Authors and Affiliations

  1. ZAO Research Institute of Introscopy, MNPO Spektr, ul. Usacheva 35, str. 1, Moscow, 119048, Russia

    V. F. Muzhitskii

  2. Physicotechnical Institute, Ural Division, Russian Academy of Sciences, ul. Kirova 132, Izhevsk, 426000, Russia

    V. B. Remezov & V. A. Komarov

Authors
  1. V. F. Muzhitskii
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  2. V. B. Remezov
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  3. V. A. Komarov
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Additional information

Original Russian Text © V.F. Muzhitskii, V.B. Remezov, V.A. Komarov, 2007, published in Defektoskopiya, 2007, Vol. 43, No. 1, pp. 64–79.

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Muzhitskii, V.F., Remezov, V.B. & Komarov, V.A. Fundamentals of electromagnetic-acoustic-transformation thickness measurements with attachable probes: III. Inverse and double electromagnetic-acoustic transformation in a normal polarizing field. Russ J Nondestruct Test 43, 48–61 (2007). https://doi.org/10.1134/S1061830907010081

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  • DOI: https://doi.org/10.1134/S1061830907010081

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