On the influence of plastic deformations of low-carbon ferromagnetic steels on the changes in the shapes of their hysteresis loops and the field dependences of the differential permeability
| Autor: | V. G. Kuleev, T. P. Tsar'kova, A. S. Doroshek, E. Yu. Sazhina |
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| Rok vydání: | 2015 |
| Předmět: |
010302 applied physics
Materials science Structural material Condensed matter physics Mechanical Engineering Condensed Matter Physics Residual 01 natural sciences Electromagnetic induction Magnetic field Magnetic anisotropy Nuclear magnetic resonance Ferromagnetism Mechanics of Materials Residual stress Permeability (electromagnetism) 0103 physical sciences General Materials Science 010301 acoustics |
| Zdroj: | Russian Journal of Nondestructive Testing. 51:738-749 |
| ISSN: | 1608-3385 1061-8309 |
| DOI: | 10.1134/s1061830915120062 |
| Popis: | It is shown that inflections in the hysteresis loops of Ст3 low-carbon steel after its plastic deformation are determined by the appearance of a magnetic state of the easy-plane type in a part of the grains. The residual compressive stresses were found at which the maximum possible number of jumps of 90° domain boundaries (DBs) are observed. An expression for the energy of a domain with a 90° DB was obtained. It depends only on the field, the residual stresses, and the angle between the field and the chosen easy axis (EA) of a grain that is located in the easy plane (EP). This made it possible to find the conditions for the onset of irreversible jumps of the 90° DBs to the EP and back. As a result of the proposed theoretical model, the values of the fields of the differential permeability μd(H) peaks were determined, which are observed in positive and negative magnetic fields on the descending hysteresis-loop back. The ratios of the magnitudes of these peak were also found. |
| Databáze: | OpenAIRE |
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