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01-04-2021 | ELECTROMAGNETIC METHODS | Issue 4/2021

Russian Journal of Nondestructive Testing 4/2021

Reconstructing the Topography of Surface Defects of Ferromagnets in a Normal Magnetization Field

Journal:
Russian Journal of Nondestructive Testing > Issue 4/2021
Authors:
Yu. L. Gobov, S. E. Popov

Abstract

The method of reconstructing the topography of defects in a ferromagnet in a normal magnetization field is considered. It is shown that with such magnetization the surface of the soft ferromagnetic is an equipotential surface. An approximation is proposed that allows one to obtain the topography of a defect from the results of measuring three components of the magnetic field at a small distance from the defect. The reconstruction accuracy is estimated based on the results of calculating the field due to the defect by the method of finite elements and reconstructing the defect topography using the approximation proposed.

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