Non-Destructive Evaluation of Steel Surfaces after Severe Plastic Deformation via the Barkhausen Noise Technique

This paper reports about the non-destructive evaluation of surfaces after severe shot peening via the Barkhausen noise technique. Residuals stresses and the corresponding Almen intensity, as well as microstructure alterations, are correlated with the Barkhausen noise signal and its extracted features. It was found that residual stresses as well as the Barkhausen noise exhibit a valuable anisotropy. For this reason, the relationship between the Barkhausen noise and stress state is more complicated. On the other hand, the near-the-surface layer exhibits a remarkable deformation induced softening, expressed in terms of the microhardness and the corresponding crystalline size. Such an effect explains the progressive increase of the Barkhausen noise emission along with the shot-peening time. Therefore, the Barkhausen noise can be considered as a promising technique capable of distinguishing between the variable regimes of severe shoot peening.

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Usage of Barkhausen Noise for Assessment of Corrosion Damage on Different Low Alloyed Steels

Applied Sciences ◽

10.3390/app112210646 ◽

2021 ◽

Vol 11 (22) ◽

pp. 10646

Author(s):

Filip Pastorek ◽

Martin Decký ◽

Miroslav Neslušan ◽

Martin Pitoňák

Keyword(s):

Salt Spray ◽

Corrosion Damage ◽

Noise Signal ◽

Peak Position ◽

Barkhausen Noise ◽

Variable Degree ◽

Neutral Salt ◽

Noise Emission ◽

Corrosion Attack ◽

Non Destructive

This study deals with corrosion damage of low alloyed feritic steels of variable strength. Three different steels of nominal yield strength 235, 700 and 1100 MPa were subjected to the variable degree of corrosion attack developed in the corrosion chamber under a neutral salt spray (NSS) atmosphere. The corrosion damage was investigated by the use of conventional metallographic observations when the thickness of corroded layer was quantified. Moreover, non-destructive magnetic technique, based on Barkhausen noise, was also employed. It was found that the rate of corrosion damage decreases along with the increasing number of days in the chamber. The similar evolution can be also found for Barkhausen noise emission and the extracted parameters from the emission. It can be reported that conventional rms value of Barkhausen noise signal as well as FWHM (full width at half maximum of Barkhausen noise envelope) can be linked with the corrosion extent, especially in the early phases of corrosion attack. The PP (peak position of Barkhausen noise envelope) values exhibit poor sensitivity.

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Influence of Components Bending on the Consecutive Plasma Nitridation and Barkhausen Noise Emission

Communications - Scientific letters of the University of Zilina ◽

10.26552/com.c.2019.1.22-27 ◽

2019 ◽

Vol 21 (1) ◽

pp. 22-27

Author(s):

Miroslav Neslusan ◽

Jan Moravec

Keyword(s):

Plasma Nitriding ◽

Surface States ◽

Compound Layer ◽

Barkhausen Noise ◽

Noise Emission ◽

Destructive Testing ◽

Flat Surfaces ◽

Plasma Nitridation ◽

Non Destructive Evaluation ◽

Non Destructive

This paper deals with the non destructive evaluation of components after the plasma nitridation via the Barkhausen noise techniques. Effect of different surface states before the plasma nitriding is studied via the non destructive Barkhausen noise technique, as well as the conventional destructive techniques. Bending of flat samples to different bending angles was performed and magnetic, as well as conventional destructive testing, was carried out on the outer, inner and flat surfaces. The results of experiments show that the Barkhausen noise emission is a function of the heat treatment, whereas intensity of bending and the corresponding deformation are only minor. The different states of the surface before the plasma nitriding result into the similar thickness of the compound layer. Furthermore, the underlying diffusion of near the surface layer state is different.

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Optimisation of amplitude distribution of magnetic Barkhausen noise

Journal of Electrical Engineering ◽

10.1515/jee-2017-0071 ◽

2017 ◽

Vol 68 (5) ◽

pp. 384-389

Author(s):

Jozef Pal’a ◽

Vladimír Jančárik

Keyword(s):

Measurement Method ◽

Measurement Accuracy ◽

Amplitude Distribution ◽

Barkhausen Noise ◽

Significant Issue ◽

Magnetic Barkhausen Noise ◽

Non Destructive Evaluation ◽

Treatment Conditions ◽

Lift Off ◽

Non Destructive

Abstract The magnetic Barkhausen noise (MBN) measurement method is a widely used non-destructive evaluation technique used for inspection of ferromagnetic materials. Besides other influences, the excitation yoke lift-off is a significant issue of this method deteriorating the measurement accuracy. In this paper, the lift-off effect is analysed mainly on grain oriented Fe-3%Si steel subjected to various heat treatment conditions. Based on investigation of relationship between the amplitude distribution of MBN and lift-off, an approach to suppress the lift-off effect is proposed. Proposed approach utilizes the digital feedback optimising the measurement based on the amplitude distribution of MBN. The results demonstrated that the approach can highly suppress the lift-off effect up to 2 mm.

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Non-destructive evaluation of cooling rate and toughness in hot-work tool steel quenched from various austenitization temperatures by Barkhausen noise analysis (In Japanese: English Abstract)

NDT & E International ◽

10.1016/s0963-8695(97)81557-5 ◽

1996 ◽

Vol 29 (5) ◽

pp. 341

Keyword(s):

Cooling Rate ◽

Tool Steel ◽

Noise Analysis ◽

English Abstract ◽

Barkhausen Noise ◽

Non Destructive Evaluation ◽

Hot Work Tool Steel ◽

Non Destructive ◽

Japanese English

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Assessment of Tendon Prestressing after Long-Term Service via the Barkhausen Noise Technique

Materials ◽

10.3390/ma12203450 ◽

2019 ◽

Vol 12 (20) ◽

pp. 3450 ◽

Cited By ~ 3

Author(s):

Miroslav Neslušan ◽

František Bahleda ◽

Martin Moravčík ◽

Katarína Zgútová ◽

Filip Pastorek

Keyword(s):

Stress State ◽

Noise Signal ◽

Barkhausen Noise ◽

Highway Bridge ◽

Noise Emission ◽

Laboratory Assessment ◽

The Real

This paper deals with the assessment of a real prestressed tendon by the use of Barkhausen noise emission. The tendon was obtained from a real highway bridge after 33 years in service. Barkhausen noise is studied as a function of the stress state, and the Barkhausen noise signals received directly from the tendon on the real bridge are compared with the Barkhausen noise signals received from the tendon during loading in the laboratory. Assessment of the prestressing is based on the analysis of the effective value of the Barkhausen noise signal as well as the position in which the Barkhausen noise envelopes attain a maximum.

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Attenuation of Barkhausen Noise Emission due to Variable Coating Thickness

Coatings ◽

10.3390/coatings11030263 ◽

2021 ◽

Vol 11 (3) ◽

pp. 263

Author(s):

Katarína Zgútová ◽

Martin Pitoňák

Keyword(s):

Corrosion Resistance ◽

Stress State ◽

Magnetic Fields ◽

Tensile Stress ◽

Coating Thickness ◽

Barkhausen Noise ◽

Noise Emission ◽

The Real ◽

And Shifts ◽

The Relationship

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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An Investigation of Corrosion Progression Using Laser Profilometry

Studies in Applied Electromagnetics and Mechanics - Electromagnetic Non-Destructive Evaluation (XXIII) ◽

10.3233/saem200028 ◽

2020 ◽

Author(s):

Hong Zhang ◽

Ruikun Wu

Keyword(s):

Mild Steel ◽

Early Stage ◽

Low Cost ◽

Experimental Studies ◽

Thickness Variation ◽

Non Destructive Evaluation ◽

Laser Profilometry ◽

Corrosion Science ◽

The Relationship ◽

Non Destructive

Atmospheric corrosion progression characterisation on metal substrates is a major problem in the field of corrosion science and Non-destructive Evaluation (NDE). A laser profilometry has been used to characterise the corrosion on the mild steel plate at a low cost and high resolution. Four mild steel samples have been measured which exposed to the marine environment from 1 month to 10 months. Two features have been developed to characterise thickness variation in the corrosion layer. These features have been used to characterise corrosion progression through experimental studies. The relationship between these features and corrosion progression has been derived which is useful for corrosion progression measurement, early-stage corrosion prediction, and monitoring areas.

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Multivariate non-destructive evaluation for tensile strength of steel based on neural network

Insight - Non-Destructive Testing and Condition Monitoring ◽

10.1784/insi.2021.63.7.427 ◽

2021 ◽

Vol 63 (7) ◽

pp. 427-435

Author(s):

Junyang Tan ◽

Dan Xia ◽

Shiyun Dong ◽

Honghao Zhu ◽

Binshi Xu

Keyword(s):

Tensile Strength ◽

Magnetic Hysteresis ◽

Barkhausen Noise ◽

Non Destructive Testing ◽

Magnetic Barkhausen Noise ◽

Testing Methods ◽

Destructive Testing ◽

Ultrasonic Signals ◽

Non Destructive Evaluation ◽

Non Destructive

Tensile strength (TS) is an important mechanical property of a material. The conventional mechanical measurement method destroys the object under investigation; hence, the non-destructive evaluation of tensile strength of materials has become a research hotspot in recent years. Currently, there are some accuracy problems associated with evaluating the tensile strength of materials on the basis of single non-destructive testing (NDT) methods such as ultrasonic or electromagnetic methods. In this study, 45 steel is used as an example to study various non-destructive testing methods. First, seven different heat treatment systems are used to prepare standard specimens with different tensile strengths, which are measured by tensile tests. Second, non-destructive testing signals for each specimen are obtained as ultrasonic signals, magnetic Barkhausen noise and magnetic hysteresis signals, and the characteristic parameters of the signals are extracted. Then, single-parameter non-destructive evaluation (SNE) models of tensile strength with three different non-destructive testing methods are developed. Furthermore, a multivariate non-destructive evaluation (MNE) method based on ultrasonic signals, magnetic Barkhausen noise and magnetic hysteresis is proposed to improve the accuracy of the tensile strength measurements obtained from non-destructive testing. A deep residual network (ResNet) is used to combine the features of the three non-destructive testing parameters and an MNE model of tensile strength is developed. Moreover, a data pretreatment method based on the fuzzy mapping relationship is applied to train the MNE model successfully and enhance the stability, accuracy and reliability of the obtained results. Finally, the accuracies of the above four tensile strength evaluation models are confirmed by verification using the specimens. The results show that the MNE model has higher accuracy than the SNE models.

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