Some Concepts on Remagnetization of Ferromagnets -- Barkhausen Effect and Emission of Elastic Waves Under Remagnetization of Ferromagnet -- Models of MAE and Interaction of Magnetic Field with Cracks -- Models of Hydrogen Cracks Initiation as Sources of Elastic Waves Emission -- Estimation of Hydrogen Effect on Metals Fracture -- Determination of Magnetic Ductility and Residual Magnetization of Steels -- Methodology of Investigation the Hydrogen Influence on Ferromagnet -- Mathematical Models of MAE Signal and its Informative Parameters -- Evaluation of Electrolytically Absorbed Hydrogen by MAE Parameters.

The book presents theoretical and experimental studies to establish the relationship between volume jumps of the 90° domain wall in a ferromagnetic material and the magnitude of the half-space surface displacement caused by it. A method of evaluating the influence of the external magnetic field on the stress intensity factor at the tip of the crack-like defects in ferromagnets is discussed. The influence of hydrogen on the generation of magneto-elastic acoustic emission signals of ferromagnets is described. The features of magneto-elastic acoustic emission due to the presence of plastic deformation, structural changes, and volumetric damage in such structural materials are shown.