Magnetic Barkhausen Noise Characterization of the Recrystallization of a Non-Oriented Electrical Steel after Cold Rolling at Different Angles to the Hot Rolling Direction

Abstract:

Non-oriented electrical steel sheets are the most commonly used material for the manufacturing of magnetic cores for electric motors and generators. The microstructure and texture of the steel after final annealing have a significant effect on the magnetic properties of the lamination core. To investigate the effect of cold rolling and annealing on the magnetic properties of the steel sheets, a 0.9 wt% Si non-oriented electrical steel was cold rolled at different angles to the hot rolling direction (HRD) and annealed at various temperatures (600°C to 750°C) to produce dissimilar microstructures. The progress of recrystallization was characterized by electron backscatter diffraction (EBSD), and the magnetic response of the steel at various stages of recrystallization was evaluated by magnetic Barkhausen noise (MBN). A number of MBN parameters, e.g. the root mean square, the smoothed envelope, the peak, the full width at half maximum (FWHM) of the envelope, the time integral of the MBN signals and the MBN energy, were analyzed with respect to the fraction of recrystallization during annealing. The results show that cold rolling at different angles to the hot rolling direction induces various deformation microstructures and stored energies, which, in turn, lead to considerably different recrystallization behaviours during annealing. The difference in recrystallization of these materials is also reflected in the MBN parameters.

• Periodical: Materials Science Forum (Volume 941)
• Pages: 274-279
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.941.274
• Online since: December 2018
• Authors: You Liang He*, Mehdi Mehdi, Erik J. Hilinski, Afsaneh Edrisy
• Keywords: Magnetic Barkhausen Noise, Microstructure, Non-Oriented Electrical Steel, Recrystallization, Rolling

References

[1] J. J. Sidor, K. Verbeken, E. Gomes, J. Schneider, P.R. Calvillo, L.A.I. Kestens, Through process texture evolution and magnetic properties of high Si non-oriented electrical steels, Mater. Char. 71 (2012) 49-57.

DOI: 10.1016/j.matchar.2012.06.006

[2] Y. He, E. Hilinski, J. Li, Texture Evolution of a Non-oriented Electrical Steel Cold Rolled at Directions Different from the Hot Rolling Direction, Metall. Mater. Trans. A. 46 (2015) 5350-5365.

DOI: 10.1007/s11661-015-3136-5

[3] Y. He, E.J. Hilinski, Texture and magnetic properties of non-oriented electrical steels processed by an unconventional cold rolling scheme, J. Magn. Magn. Mater. 405 (2016) 337-352.

DOI: 10.1016/j.jmmm.2015.12.057

[4] Y. He, M. Mehdi, E. J. Hilinski, A. Edrisy, Effect of Annealing Temperature on the Texture and Magnetic Barkhausen Noise of a Non-oriented Electrical Steel (0.88 wt% Si) after Inclined Cold Rolling, Materials Science and Engineering: IOP Conference Series. In press (2018).

DOI: 10.1088/1757-899x/375/1/012013

[5] M. Mehdi, Y. He, E. J. Hilinski, A. Edrisy, Effect of skin pass rolling reduction rate on the texture evolution of a non-oriented electrical steel after inclined cold rolling, J. Magn. Magn. Mater. 429 (2017) 148-160.

DOI: 10.1016/j.jmmm.2017.01.020

[6] C.G. Stefanita, Chapter 2 Barkhausen Noise as a Magnetic Nondestructive Testing Technique, in: R. Hull, J.R.M. Osgood, J. Parisi, J.H. Warlimont (Eds.), From Bulk to Nano, The Many Sides of Magnetism, Springer, Berlin, 2008, pp.19-40.

DOI: 10.1007/978-3-540-70548-2_2

[7] Y. He, M. Mehdi, E.J. Hilinski, A. Edrisy, Through-Process Characterization of Local Anisotropy of Non-oriented Electrical Steel Using Magnetic Barkhausen Noise, J. Magn. Magn. Mater. 453 (2018) 149-162.

DOI: 10.1016/j.jmmm.2018.01.023

[8] Stresstech Group, MicroScan 600 Operating Instructions, V.5.4b (2015) 1-37.

[9] K. Gurruchaga, A. Martinez-De-Guerenu, M. Soto, F. Arizti, Magnetic Barkhausen Noise for Characterization of Recovery and Recrystallization, IEEE Transactions on Magnetics. 46 (2010) 513-516.

DOI: 10.1109/tmag.2009.2029069

[10] S. Tiitto, M. Otala, S. Saynajakangas, Non-destructive measurement of steel grain size, Non Destructive Testing. 9 (1976) 117-120.

DOI: 10.1016/0029-1021(76)90239-5