Applicability of local magnetic measurements

Stupakov, O.; Kikuchi, Hiroaki; Liu, T.; Takagi, Toshiyuki

doi:10.1016/j.measurement.2008.11.005

Cited by 19 publications

(14 citation statements)

References 23 publications

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“…It depends on the above-mentioned uncontrollable experimental factors and also includes the technological deviations of steel microstructure, which can provide a comparable result error [15]. In addition, the accurate direct field measurement provides a physically based reference to the real magnetization state of the sample surface [14,20]. In our case of carefully performed experiments, even the commonly used method of evaluating the field proportionally to the magnetization current gives the comparable results (see Fig.…”

Section: Discussionmentioning

confidence: 79%

Evaluation of surface decarburization depth by magnetic Barkhausen noise technique

Stupakov

Perevertov

Tomáš

et al. 2011

Journal of Magnetism and Magnetic Materials

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Section: Discussionmentioning

confidence: 79%

Evaluation of surface decarburization depth by magnetic Barkhausen noise technique

Stupakov

Perevertov

Tomáš

et al. 2011

Journal of Magnetism and Magnetic Materials

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“…However, the AC BN measurement is unstable due to variations of the sample magnetic properties and of the yoke lift-off [5,9]. The appropriate solution to this problem is control of the magnetization conditions by a feedback system, keeping the field/flux waveform identical to a prescribed standard [2,22,26].…”

Section: Article In Pressmentioning

confidence: 99%

“…The recent improvements in measurement techniques and in magnetic Hall/GMR (giant magnetoresistive) sensors create the necessary prerequisites for this next qualitative advance in the field of magnetic testing [3,10,12]. An integrated BN sensor is proposed to combine the single yoke, the field sensor/s for magnetization control with digital feedback, and the pancake coil for the BN measurement [13,24,26].…”

Section: Article In Pressmentioning

confidence: 99%

Governing conditions of repeatable Barkhausen noise response

Stupakov

Pal’a

Takagi

et al. 2009

Journal of Magnetism and Magnetic Materials

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“…It is interesting to note, that the magnetic FEM was rarely if ever used in the context of quantitative MMM-related research. The authors know only of simulations concerning qualitative magnetic defectoscopy [9,[21][22][23]. The only work aiming at defining a quantitative stress-field with magnetic FEM and experiment [24] did not attain the objectives, as declared by its author.…”

Section: Introductionmentioning

confidence: 99%

Discussion of Derivability of Local Residual Stress Level from Magnetic Stray Field Measurement

Augustyniak

Usarek

2015

J Nondestruct Eval

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The NDT procedure dubbed 'metal magnetic memory' method and the related ISO 24497 standard has found wide industrial acceptance in some countries, mainly in Russia and China. The method has been claimed by some researchers (Roskosz and Bieniek in NDT&E Int 45:55-62, 2012; Wilson et al. in Sens Actuators A 135:381-387, 2007) as having potential for quantitative determination of local residual stress state in engineering structures, at least for some steel grades. This work presents a critical reexamination of a previous important study by Roskosz and Bieniek, who claimed to have found a direct relationship between local residual equivalent stress levels ranging from 0 to 50 MPa, and the stray field gradients in T/P24 steel sample placed in the Earth's ambient magnetic field. We reconstruct their experiment in a magnetic finite element simulation, computing stray magnetic field and its tangential gradients along the axis of the sample. Different combinations of remanent induction and relative magnetic permeability levels have been modeled, and the influence of geometrical discontinuity is quantified. In order to validate magnetic finite element methodology, a new experiment is presented, along with its numerical counterpart. The magnetic finite element method allowed to obtain a good quantitative correlation with well-controlled stray field measurements. It is demonstrated, that the residual stress level of order of 50 MPa is not the only factor, on which the stray field measurement depends. The geometrical discontinuity and the remanent induction contribute to a higher extent to the field amplitudes. Consequently we prove, that a bidirectional correlation between B Marek Augustyniak maugustyniak@mif.pg.gda.pl 1 Gdansk University of Technology, 80233 Gdansk, Poland 2 DES ART Ltd, 81366 Gdynia, Poland the magnetic field gradient and local stress levels cannot be determined because of at least three concurrent inseparable factors on which the measured stray field and its spatial gradient depends.

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Applicability of local magnetic measurements

Cited by 19 publications

References 23 publications

Evaluation of surface decarburization depth by magnetic Barkhausen noise technique

Evaluation of surface decarburization depth by magnetic Barkhausen noise technique

Governing conditions of repeatable Barkhausen noise response

Discussion of Derivability of Local Residual Stress Level from Magnetic Stray Field Measurement

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