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Effect of Plastic Deformation on the Excess Loss of Electrical Steel

Rodrigues-Jr, D. L. ; Silveira, J. R. F. ; Gerhardt, G. J. L. ; Missell, F. P. ; Landgraf, F. J. G. ; Machado, R. ; de Campos, M. F.

IEEE transactions on magnetics, 2012-04, Vol.48 (4), p.1425-1428

New York, NY: IEEE

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Título:
Effect of Plastic Deformation on the Excess Loss of Electrical Steel
Autor: Rodrigues-Jr, D. L. ; Silveira, J. R. F. ; Gerhardt, G. J. L. ; Missell, F. P. ; Landgraf, F. J. G. ; Machado, R. ; de Campos, M. F.
Assuntos: Applied sciences ; Barkhausen noise ; Cross-disciplinary physics: materials science; rheology ; dislocation density ; Exact sciences and technology ; excess loss ; Frequency measurement ; Loss measurement ; Magnetic hysteresis ; magnetic properties ; Materials science ; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology ; Metals. Metallurgy ; Noise ; Other topics in materials science ; Physics ; plastic deformation ; Plastics ; Steel ; Strain
É parte de: IEEE transactions on magnetics, 2012-04, Vol.48 (4), p.1425-1428
Descrição: The interpretation of the effect of plastic deformation on the calculated excess loss component (anomalous-loss) supports the concept of loss separation. Magnetic losses and Barkhausen noise of nonoriented electrical steel sheets were measured on Epstein strips taken from a single coil of 0.8% Si nonoriented electrical steel. Sheets were extracted in the annealed condition, without any skin pass and with a grain size of 18 μm. This material was cold rolled in order to obtain sets of samples with true strain from 2% up to 29%. X-ray diffraction was used to estimate the dislocation density. The analysis of magnetic properties was performed by Barkhausen noise measurements and also by analyzing the hysteresis loops obtained from Epstein frame measurements for different inductions and different frequencies (including the quasi-static regime for hysteresis loss measurements). These data allowed us to observe that most of the well known total loss increase with plastic deformation is due to an increase in the hysteresis loss component, while excess loss decreases to become negligible. This behavior can be explained if it is assumed that the plastic deformation lead to an increase in the number of domain walls per unit volume, thereby decreasing the excess loss. Barkhausen peak area increases with plastic deformation, reproducing results taken from samples of different silicon content.
Editor: New York, NY: IEEE
Idioma: Inglês

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Effect of Plastic Deformation on the Excess Loss of Electrical Steel

Rodrigues-Jr, D. L. ; Silveira, J. R. F. ; Gerhardt, G. J. L. ; Missell, F. P. ; Landgraf, F. J. G. ; Machado, R. ; de Campos, M. F.

New York, NY: IEEE

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