Распределение плотности вихревых токов в металлическом образце, возбуждаемых полем линейного тока

Abstract

The analysis of common methods and means of nondestructive testing of metal. The features of eddy-current testing. Shows the relationship for the vector potential of the magnetic field generated by alternating current linear conductor. The calculation of the density of the eddy-currents in the sample sheet of ferromagnetic and non-ferromagnetic metals. The graphs, allowing to estimate the parameters of the eddy-currents in the interior as a non-ferromagnetic and ferromagnetic metals. Illustrates the complexity of the flow distribution of the eddy currents, which depends on the properties of controlled metal. Shown that for a ferromagnetic material must mention the great spreading of eddy-currents near the surface compared to the non-magnetic metal. It is shown that the maximum value of eddy-current density is at a depth rather than on the surface of the inspection object.