Magnetic Barkhausen noise: the influence of microstructure and deformation in bending

Blaow, Mohamed M.; Evans, J.T.; Shaw, Brian

doi:10.1016/j.actamat.2004.09.021

Cited by 78 publications

(54 citation statements)

References 17 publications

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“…Plastic deformation also affects the number of pinning sites, crystallographic texture and stress through work-hardening phenomena [17]. Blaow et al [20] noticed an increasing tensile strain increases the BN peak height and also shifts the peak position to lower magnetic field strengths.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have been carried out to study the effect of bending on the BN phenomena [11,12,[20][21][22]. In one example of these bending tests, the specimen acts as a cantilever.…”

Section: Introductionmentioning

confidence: 99%

“…In one example of these bending tests, the specimen acts as a cantilever. In the studies [11,12,[20][21][22] made with this method, the specimens were mounted in such a way that the BN measurements could be carried out from both sides of the sample, from the surface under tension and from the opposite surface under compression. The bending moment was incrementally applied by increasing the mass on the free end of the cantilever.…”

Section: Introductionmentioning

confidence: 99%

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Barkhausen noise characterisation during elastic bending and tensile-compression loading of case-hardened and tempered samples

Santa-aho

Vippola

Saarinen³

et al. 2012

J Mater Sci

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This study examined the Barkhausen noise (BN) response of carburising case-hardened steel with varying tempering stages. The test material was loaded in bending and in alternating loading. The aim of the study was to obtain relevant multiparameter BN data from different loading conditions and to investigate the effect of applied stress on the BN response. The test bar series was made from casehardened steel. Different tempering parameters were used to vary the surface hardness and the surface residual stresses of the studied series of test bars. In the bending tests, the samples were subjected to incrementally applied loading in the purely elastic deformation region. In addition, uniaxial stepwise loading with tensile and compressive stress was applied to selected samples simultaneously with the BN measurements. The BN measurements were performed under different loading conditions along with X-ray diffraction strain measurements in bending. The results revealed linear behaviour between the reciprocal root mean square value and the stress values obtained with strain gages and X-ray diffraction for the tempered samples.

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Section: Introductionmentioning

confidence: 99%

“…Several studies have been carried out to study the effect of bending on the BN phenomena [11,12,[20][21][22]. In one example of these bending tests, the specimen acts as a cantilever.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Barkhausen noise characterisation during elastic bending and tensile-compression loading of case-hardened and tempered samples

Santa-aho

Vippola

Saarinen³

et al. 2012

J Mater Sci

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“…Blaow et al 19 pointed out that microstructures in carbon steels associated with magnetic softness were associated with higher peaks. Also, these authors reported that the presence of strain might lead to a separation of the Barkhausen signal peak into three different peaks.…”

Section: Barkhausen Noise Measurementsmentioning

confidence: 99%

“…For this reason, MBN is sensitive to microstructure, plastic and elastic strains in ferromagnetic materials [18][19][20][21] . It is also heavily influenced by defects such as porosity, inclusions, dislocations, pinning of punctual imperfections and stresses present 22,23 .…”

Section: Introductionmentioning

confidence: 99%

Use of Magnetic Barkhausen Noise (MBN) to Follow Up the Formation of Sigma Phase in Saf2205 (UNS S31803) Duplex Stainless Steel

et al. 2016

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Duplex stainless steels have a structure normally composed of austenite and ferrite in approximately equal proportions. In order to attain control of its fabrication processes and performance, it is important to understand its microstructural evolution, due to the formation of intermetallic phases such as sigma (σ) and chi (χ), which may cause a severe deterioration of mechanical properties. In the present study, the evolution of sigma phase during heat treatments at temperatures in which intermetallic phases can be formed (800ºC-900°C) was studied using magnetic analyses on a SAF2205 (DIN 1.4462/UNS S31803) steel. A significant reduction of the intensity of Magnetic Barkhausen Noise (MBN) was observed with the increase of heat treatment time, indicating a decrease in the quantity of ferromagnetic phases. For 24-hour-long treatments, the Barkhausen Noise signal is almost completely enclosed by the background noise, indicating the existence of a very small volume fraction of ferrite. If proper calibration samples are to be produced, this technique may be a viable method for non-destructive evaluation of field components working under thermal conditions that may cause the formation of intermetallic phases.

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Barkhausen Noise as a Magnetic Nondestructive Testing Technique

2008

Springer Series in Materials Science

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Magnetic Barkhausen noise: the influence of microstructure and deformation in bending

Cited by 78 publications

References 17 publications

Barkhausen noise characterisation during elastic bending and tensile-compression loading of case-hardened and tempered samples

Barkhausen noise characterisation during elastic bending and tensile-compression loading of case-hardened and tempered samples

Use of Magnetic Barkhausen Noise (MBN) to Follow Up the Formation of Sigma Phase in Saf2205 (UNS S31803) Duplex Stainless Steel

Barkhausen Noise as a Magnetic Nondestructive Testing Technique

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