Non-destructive magnetic measurement of steel grain size

Titto, S.; Otala, Matti; Säynäjäkangas, S.

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

Cited by 33 publications

(5 citation statements)

References 4 publications

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“…The MBN has been found to be sensitive to the microstructure [1][2][3] and to the applied tensile stress [4][5][6] in ferromagnetic materials. For this reason, the MBN is now being widely used as a nondestructive technique for the characterization of these materials.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Barkhausen jump in low carbon steel

Benítez

Capó-Sánchez

Padovese³

2008

Journal of Applied Physics

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This work presents a model for the magnetic Barkhausen jump in low carbon content steels. The outcomes of the model evidence that the Barkhausen jump height depends on the coercive field of the pinning site and on the mean free path of the domain wall between pinning sites. These results are used to deduce the influence of the microstructural features and of the magnetizing parameters on the amplitude and duration of the Barkhausen jumps. In particular, a theoretical expression, establishing the dependence of the Barkhausen jump height on the carbon content and grain size, is obtained. The model also reveals the dependence of the Barkhausen jump on the applied frequency and amplitude. Theoretical and experimental results are presented and compared, being in good agreement.

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Section: Introductionmentioning

confidence: 99%

Modeling of the Barkhausen jump in low carbon steel

Benítez

Capó-Sánchez

Padovese³

2008

Journal of Applied Physics

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“…On the other hand, the decrease of the dislocation density would increase the distance of the movements of domain walls, causing larger amplitudes of the pulses [9]. The increase of the grain boundaries tends to increase the number of MBN jumps [6,10]. The variations of the MBN parameters with respect to the annealing temperature are the combined effects of all these factors.…”

Section: Thermec 2018mentioning

confidence: 99%

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

He¹,

Mehdi²,

Hilinski³

et al. 2018

MSF

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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.

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“…The temporary domain wall pinning is the result of various microstructural parameters, such as inhomogeneities in the form of carbides, inclusions and precipitates [10,13] as well as plastic deformation involving dislocation structure [14]. Grain size [15], texture [16] and phase change [17] can also affect the domain structure, which, in turn, modifies interactions with domain wall pinning sites. Size, density, distribution and strength of pinning sites have significant effects on the critical magnetic field required to start domain wall motion [18].…”

Section: Introductionmentioning

confidence: 99%

Decoupling the effect of stress and microstructure on MBN response in cast Q1N steel

Kashefi

Krause

Underhill

et al. 2021

Materials Science and Technology

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Q1N samples with different degrees of tempering were produced and changes in MBN energies in non-stressed and stressed samples was investigated. It was observed that while MBN energy decreased with increasing degree of tempering, it increased with applied uniaxial stress and the two opposing effects cannot be easily separated. MBN energy increased with stress along RD and decreased in the transverse direction (TD). Therefore, the ratio of MBN energy in RD to TD was examined. The value of the ratio at 0.3 T was successfully shown to be strongly correlated with applied uniaxial tensile stress level, regardless of the degree of tempering (pinning site density) in Q1N samples.

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Non-destructive magnetic measurement of steel grain size

Cited by 33 publications

References 4 publications

Modeling of the Barkhausen jump in low carbon steel

Modeling of the Barkhausen jump in low carbon steel

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

Decoupling the effect of stress and microstructure on MBN response in cast Q1N steel

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