Influence of Sample Size and Magnetizing Voltage on Barkhausen Noise during Bending and Uniaxial Tensile Tests

Šrámek, Juraj; Neslušan, Miroslav; Bahleda, František; Zgútová, Katarína; Schenk, P.

doi:10.12693/aphyspola.137.640

Cited by 11 publications

(8 citation statements)

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“…FWHM in RD exhibited quite good sensitivity of this MBN parameter for assessment of TS (see Figure 13a). This MBN parameter has already been reported as being suitable for assessment of TS when conventional MBN or/and PP exhibit poor sensitivity [32]. Figure 13a illustrates that FWHM progressively decreased with TS, but the FWHM-TS curves were mixed with unambiguous tendency with respect to the variable coating thickness.…”

Section: Tensile Testmentioning

confidence: 75%

Attenuation of Barkhausen Noise Emission due to Variable Coating Thickness

Zgútová

Pitoňák

2021

Coatings

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Monitoring of the stress state of bridges by the use of the Barkhausen noise technique has been already introduced and this method can be adapted for monitoring of component’s overstressing. Measurement of Barkhausen noise on real bridges is carried out through the coating applied as a layer to increase the corrosion resistance of bodies. However, it was found that the thickness of the coating could vary, which in turn affects the Barkhausen noise signals and makes it difficult to assess the real stress state. For this reason, this paper deals with attenuation of Barkhausen noise emission due to variable thicknesses of coatings on the steel S460MC. It was found that increasing the thickness progressively decreases the Barkhausen noise emission and shifts the Barkhausen noise envelopes to the higher magnetic fields. Furthermore, the thickness of the coating also affects the relationship between the tensile stress and the Barkhausen noise.

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Section: Tensile Testmentioning

confidence: 75%

Attenuation of Barkhausen Noise Emission due to Variable Coating Thickness

Zgútová

Pitoňák

2021

Coatings

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“…15a). FWHM of MBN envelopes exhibits quite good sensitivity with respect to TS [32]. Figure 15a demonstrates that FWHM exhibits progressively decreases along with TS but the FWHM-TS curves are mixed in the region of lower TS without clear tendency with respect to the variable thickness of the corroded layer.…”

Section: Tensile Testmentioning

confidence: 92%

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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“…Several indicators have been used for the estimation of residual stress: MBNenvelop [21], RMS value [15][16], MBNenergy [24], or statistical markers, including the number of avalanches [29]. The relation between mechanical stress and MBN is nonlinear and is affected by plastic deformation and fatigue [32].…”

Section: -Introductionmentioning

confidence: 99%