Problems of Evaluation of the Flaw Parameters in the Magnetic Nondestructive Testing

The magnetic leakage fields are investigated experimentally on rectangular-slit aw models for various magnetizing fields H0. It is shown that in certain cases the aw parameters can be incorrectly classified as a result of coincidence of their leakage fields. This is associated with both the choice of the magnetizing fields H0 and the effect of the aw width on the dependence of the aw field on H0: for wide aws this dependence is close to a linear function, whereas for narrow aws the dependence tends to the magnetization curve of the sample.