Monitoring of S235 steel over-stressing by the use of Barkhausen noise technique

Neslušan, Miroslav; Jurkovič, Martin; Kalina, Tomáš; Pitoňák, Martin; Zgútová, Katarína

doi:10.1016/j.engfailanal.2020.104843

Cited by 24 publications

(35 citation statements)

References 23 publications

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“…This means that the contribution of the different layers beneath the surface along with increasing (or decreasing) magnetising voltage would alter. Finally, it can be noticed that the remarkable asymmetry in the MBN envelopes occurs during the uniaxial tensile test at certain plastic strains, as it was reported in [ 18 , 19 ]. However, the non-homogeneity in the grains’ plastic straining takes a major role in this particular case.…”

Section: Discussion Of Resultssupporting

confidence: 64%

Asymmetrical Barkhausen Noise of a Hard Milled Surface

et al. 2021

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This study is focused on the asymmetrical Barkhausen noise emission of a hard milled surface during cyclic magnetisation. The Barkhausen noise is studied as a function of the magnetising voltage and the hard milled surface is compared with a surface after heat treatment. The asymmetry in the Barkhausen noise emission after hard milling occurs due to the typical “sandwich” structure and the different magnetic hardnesses of the different layers beneath the free surface. Furthermore, this asymmetry is also due to the preferential orientation of the matrix in the direction of the cutting speed and magnetostatic fields, which hinder or favour the premagnetising process.

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Section: Discussion Of Resultssupporting

confidence: 64%

Asymmetrical Barkhausen Noise of a Hard Milled Surface

et al. 2021

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“…This technique has been already reported as a promising method for measurement of the real stress state in the highway bridge [13]. Furthermore, detection of wires over-stressing [14], their corrosion damage [15], and assessment of the real pre-stress in tendons [16] has been also discussed. Components in bridges or civil constructions are usually loaded in the elastic region of stresses.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of Corrosion Extent in Steel S460MC by the Use of Magnetic Barkhausen Noise Emission

et al. 2021

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Monitoring of corrosion extent is critical in bridge operation and civil buildings. Reducing the effective cross-sectional area of components can redistribute the stress state and increase the true stress in the critical parts of civil structures. Unexpected rupture of bodies can occur as a result of their over-stressing. However, it is not possible to take relevant samples from these structures for a laboratory analysis during their lifetime. For this reason, this study investigates the potential of magnetic Barkhausen noise analysis for real-time corrosion extent monitoring. This study demonstrates that Barkhausen noise emission drops down along with an increasing degree of corrosion of steel S460MC. Progressive and remarkable decrease of Barkhausen noise and alteration of extracted features result from increasing surface roughness and superimposing influence of the increasing thickness of the near-surface layers containing mainly iron oxides. Furthermore, it was found that corrosion on the surface also alters the relation between tensile stress and Barkhausen noise within the interaction volume.

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“…The main reason for discontinuous DW motion can be viewed in their interference with the pinning sites such as dislocation tangles [4,5], grain boundaries [6], surface irregularities [7], precipitates [8], and non-ferromagnetic phases [9], etc. For this reason, MBN signals contain information about the interfering microstructure features as well as the stress state [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Plastic straining usually increases dislocation density [12,14], alters grain size and the corresponding grain boundaries, and initiates phase transformations [15], etc. For this reason, MBN is widely employed for monitoring of bodies exposed to the variable degrees of plastic strains under the various regimes of loading (uniaxial, biaxial, bending, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Magnetic Anisotropy and Barkhausen Noise Asymmetry Resulting from Uniaxial Plastic Deformation of Steel S235

et al. 2021

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This study investigates alterations in magnetic anisotropy and the marked asymmetry in Barkhausen noise (MBN) signals after the uniaxial plastic straining of steel S235 obtained from a shipyard and used as standard structural steel in shipbuilding. It was found that the initial easy axis of magnetisation in the direction of previous rolling, and also in the direction of loading, becomes the hard axis of magnetisation as soon as the plastic strain attains the critical threshold. This behaviour is due to the preferential matrix orientation and the corresponding realignment of the magneto-crystalline anisotropy. Apart from the angular dependence of MBN, the asymmetry in the consecutive MBN bursts at the lower plastic strains is also analysed and explained as a result of magnetic coupling between the grains plastically strained and those unaffected by the tensile test. It was found that, by increasing the degree of plastic strain, the marked asymmetry in MBN tends to vanish. Moreover, the asymmetry in MBN bursts occurs in the direction of uniaxial tension and disappears in the perpendicular direction. Besides the MBN technique, XRD and EBSD techniques were also employed in order to provide a deeper insight into the investigated aspects.

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Monitoring of S235 steel over-stressing by the use of Barkhausen noise technique

Cited by 24 publications

References 23 publications

Asymmetrical Barkhausen Noise of a Hard Milled Surface

Asymmetrical Barkhausen Noise of a Hard Milled Surface

Monitoring of Corrosion Extent in Steel S460MC by the Use of Magnetic Barkhausen Noise Emission

Investigation of Magnetic Anisotropy and Barkhausen Noise Asymmetry Resulting from Uniaxial Plastic Deformation of Steel S235

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