Effects of punching process on crystal orientations, magnetic and mechanical properties in non-oriented silicon steel

Influence of mechanical and water-jet cutting on the dynamic magnetic properties of NO Fe-Si steels

“…Mechanical punching is ubiquitously applied for lamination cutting. This process has obvious detrimental consequences on the magnetic properties, because of strain-hardening and ensuing non-uniform magnetization profile across the strip width [13][14][15][16].…”

“…These investigations have phenomenological character. Their aim, on the one hand, is to determine the extent of the structural damage, the residual stress, and the induction profile across the sample width, using, for example, neutron grating interferometry, [15,16,[18][19][20][21]. On the other hand, they are generally directed at relating the cutting methods, including laser cutting, and the related parameters to the behavior of the total loss at power frequencies, with the final objective of introducing the results in the calculation of iron losses in rotating machines [13,14].…”

Influence of magnetic domain wall orientation on Barkhausen noise and magneto-mechanical behavior in electrical steel

“…Here, the [0 0 1] direction coincides with the rolling direction. The small and inhomogeneous residual compressive stresses, generated from the manufacturing, cutting and coating process [1,4,19,37,38], and possibly by the polishing process, induce complicated surface domain patterns. Some surface DWs are oriented transversely to the rolling direction, which can be seen in the left inset of domain image in figure 2.…”

“…Measurements of electromagnetic properties, both on macroscopic and microscopic levels, are critical for physical material characterization and evaluation, as well as for scientific and industrial applications. As the material is subjected to mechanical stresses from manufacturing processes or previous loading [1][2][3][4][5], the stress-induced magnetic properties changes associated with the manufacturing processes can be detrimental to their magnetic performance. In particular, the magneto-mechanical behavior is subject to intensive scientific research [6][7][8].…”

Experimental set up for magnetomechanical measurements with a closed flux path sample

“…It has been clearly shown that the mechanical stress and the plastic strain are the most important sources of degradation of the magnetic behavior [1][2][3]. As manufacturing processes, such as rolling, punching, bending and annealing, modify the mechanical properties [4][5][6][7][8], they also deeply modify the magnetic behavior of ferromagnetic materials. Compared to the raw material, the characteristics of interest for energy conversion, such as the B(H) curves or the iron losses, are almost always degraded.…”