Dynamic model of a continuity flaw during normal magnetization of a ferromagnetic article: II. Magnetostatic field of a continuity flaw during magnetization of the article with a finite-sized magnetizing instrument

A dynamic model of a finite-sized continuity flaw that is present in a ferromagnetic half-space during normal magnetization with a magnetic field produced by a bar magnetizing instrument is obtained. The model takes into account the relative position of the flaw and magnetizing system during the model’s motion along the surface of an article. During normal magnetization of the flaw with the field produced by the finite-sized bar magnet, the longitudinal component of the magnetizing field is shown to exist. The longitudinal component distorts the magnetic-field distribution of the continuity flaw and decreases its detectability.