Residual magnetic field sensing for stress measurement

Wilson, John W.; Tian, Gui Yun; Barrans, Simon

doi:10.1016/j.sna.2006.08.010

Cited by 164 publications

(104 citation statements)

References 9 publications

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“…(c) Localized stresses of order of 50 MPa in a demagnetized sample cannot produce measurable variation of the stray field. This fact was reported by [8], who gave an explanation derived from Jiles' theory. Our sensitivity analysis corroborates that statement.…”

Section: Discussion Of Resultsmentioning

confidence: 52%

“…In literature [8,25] it was shown, that the presence of magnetized clamps may produce an increase of stray field by an order of magnitude, and produce an uncontrollable remanent induction within the sample. (b) Unlike other authors [8,25], Roskosz and Bieniek extend their measurements over the notched portion of the sample, focusing on the peak found over the geometrical discontinuity. The potential geometrical effect is neglected in their interpretation.…”

Section: Reinterpreted Experiments 'E1' By Roskosz and Bieniekmentioning

confidence: 99%

“…MFL) [6], to the advantage of the former. Actually, authors presenting a MMM-based qualitative defectoscopy [8,9], exploit the well-known principles of flux leakage detection. MMM appears as a mixture of MFL (in its qualitative aspect) and magneto-elastic (Villari) effect, when stress concentrations are looked for.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussion Of Resultsmentioning

confidence: 52%

Section: Reinterpreted Experiments 'E1' By Roskosz and Bieniekmentioning

confidence: 99%

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

Augustyniak

Usarek

2015

J Nondestruct Eval

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“…This technique relies on the self magnetization of ferromagnetic structures by ambient magnetic fields such as the Earth's field (Wilson et al, 2007). It measures changes in the self magnetic leakage field of the ferromagnetic structures due to geometrical discontinuities and high density dislocations.…”

Section: Challenges and Future Applicationsmentioning

confidence: 99%

Development of Resonant Magnetic Field Microsensors: Challenges and Future Applications

Herrera-May¹,

Aguilera-Cortés²,

García-Ramírez³

et al. 2011

Microsensors

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“…14 Moreover, it does not require special magnetization devices and the tested surface does not require a special treatment. Therefore, the MMM technology has been widely applied to inspect pressure vessels, 15 piping 16 and other equipment in service. The first pilot results of a fatigue-damage analysis obtained with the BNA and MMM methods have been already reported.…”

Section: Introductionmentioning

confidence: 99%

Using the Barkhausen-noise analysis and metal-magnetic-memory method for material characteristics under fatigue damage

Kolařík¹,

Simecek²,

Kříž³

et al. 2017

Mater. Tehnol.

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The article deals with process monitoring and the subsequent diagnosis of fatigue damage during material testing of steel S355. The study was performed by means of the metal-magnetic-memory method, Barkhausen-noise analysis and X-ray diffraction. This combination could significantly enhance the inspection quality of critical mechanical-unit parts during their lifespan. X-ray diffraction was applied for the description of the state of residual stresses, in combination with the Barkhausen-noise analysis, which allows us to immediately determine the changes in the surface layer resulting from the residual-stress redistribution, hardness and potential microcracks. Additionally, a new unconventional method for the determination of the stress-concentration-zone location and for the detection of material defects and imperfections, the so-called metal-magnetic-memory method, will be introduced. Keywords: Barkhausen noise, metal-magnetic-memory method, X-ray diffraction, fatigue damagê lanek obravnava proces kontrole, in iz tega naknadno diagnozo utrujenostne po{kodbe, med preizkusom materiala, jekla S355.[tudija je bila izvedena s pomo~jo metode magnetnega spomina kovine, z Barkhausnovo analizo hrupa in z rentgensko difrakcijo. Ta kombinacija lahko ob~utno izbolj{a kvaliteto kontrole kriti~nih mehanskih komponent med njihovo`ivljenjsko dobo. Rentgenska difrakcija je bila uporabljena za opis stanja zaostalih napetosti, v kombinaciji z analizo Barkhausnovega hrupa, kar omogo~a takoj{nje dolo~anje sprememb v povr{inski plasti, kar je posledica prerazporeditve zaostalih napetosti, trdote in potencialnih mikrorazpok. Dodatno bo predstavljena nova neobi~ajna metoda za dolo~anje podro~ij koncentriranja napetosti ter za odkrivanje napak in nepravilnosti, imenovana metoda magnetnega spomina kovine. Klju~ne besede: Barkhausnov hrup, metoda magnetnega spomina kovin, rentgenska difrakcija, utrujenostna po{kodba

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Residual magnetic field sensing for stress measurement

Cited by 164 publications

References 9 publications

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

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

Development of Resonant Magnetic Field Microsensors: Challenges and Future Applications

Using the Barkhausen-noise analysis and metal-magnetic-memory method for material characteristics under fatigue damage

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