Using Barkhausen noise to measure coating depth of coated high-speed steel

Seemuang, Nopparat; Slatter, Tom

doi:10.1007/s00170-017-0120-9

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…The second aspect is associated with the attenuation of produced MBN pulses during their propagation towards the free surface through the protective layer. The intensity of MBN pulse attenuation grows along with the increasing thickness of the non-ferromagnetic coating on the ferromagnetic matrix [19]. This background explains why the MBN values for galvanized wire are below the MBN for the conventional or phosphated wires (see Figure 12c).…”

Section: Mbn Measurementsmentioning

confidence: 96%

Investigation of Barkhausen Noise Emission in Steel Wires Subjected to Different Surface Treatments

et al. 2020

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Steel rope wires represent the main bearing components of bridges whose long-term operation depends on loading conditions, corrosion attack, and/or pre-stressing. Corrosion attack especially can remarkably reduce the effective cross-sectional area, which in turn over-stresses the wires and redistributes stress to the neighboring wires. The premature collapse of many bridges is very often caused by wire rupture as a result of their poor corrosion protection. For these reasons, various processes—such as galvanizing, phosphating, etc.—have been applied to steel wires to increase their resistance against corrosion. However, these processes can alter the microstructure, especially in the near-surface regions. The Barkhausen noise technique has been already reported as a suitable technique for investigating corrosion extent and true pre-stress in the steel rope wires. This study reports that non-homogeneity of the surface state of wires undergoing different surface treatment makes it more difficult to assess the true stress state and increase the uncertainty of Barkhausen noise measurement. Barkhausen noise signals are correlated with metallographic and SEM observations as well as microhardness measurements. The non-homogeneity of the surface state of wires is also investigated by the use of chemical mapping and linear chemical analyses.

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Section: Mbn Measurementsmentioning

confidence: 96%

Investigation of Barkhausen Noise Emission in Steel Wires Subjected to Different Surface Treatments

et al. 2020

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“…[10,11]. In micro-magnetic detection equipment, the sensor as the core element is composed of a yoke, an excitation coil, and detection elements (induction coil and Hall element) [12]. In order to be suitable for the structures of different test specimen, micro-magnetic sensors are diverse.…”

Section: Introductionmentioning

confidence: 99%

Design of advanced micro-magnetic sensors for various applications

Wang

Liu

et al. 2022

J. Phys.: Conf. Ser.

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The state of the microstructures determines both the mechanical properties (hardness, yield strength, elongation, etc.) and micro-magnetic properties (magnetic Barkhausen noise (MBN), incremental permeability (IP), etc.). The non-destructive nature of the micro-magnetic testing technology facilitate it be a valuable tool for quality control in the manufacturing of ferromagnetic components. In the implementation of micro-magnetic testing, the functions and the geometry of the sensors need be customized for specific target properties and components. In this paper, four types of advanced or multifunctional sensors are presented and applied for micro-magnetic testing. First, a multifunctional sensor is developed for flat surface. Unique intermittent magnetizing method using superimposed magnetic fields of high and low frequencies enable the sensor to measure the magnetic Barkhausen noise, incremental permeability, eddy currents, tangential magnetic field and main flux. Second, to conduct magnetic Barkhausen noise testing at the inner corner of V-shape bending plate, a miniaturized sensor with U-shape roller magnetizer is designed to perfect contact with the corner region. Third, read head of a magnetic tape player is revised to act as high-lateral-resolution (up to 500μm) sensor for magnetic Barkhausen noise measurement in ferromagnetic film. Fourth, a slender probe is developed and embedded into an anti-bulking fixture that is clamped onto the flat specimen. With the slender probe together with the special fixture, the dependency of the magnetic Barkhausen noise on the compressive and tensile stress is first experimentally observed in a single flat specimen under continuous load.

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“…Magnetic Barkhausen noise (MBN) is a nondestructive testing technology that is widely used in detection of thickness of carburization layer [1] and film [2] , grain size [3] , phase content [4,5] , stress [6,7] .etc. This phenomenon is due to the interactions of domain walls with defects like grain boundaries, dislocations, inclusions and second phases, so the MBN is sensitive to microstructural changes of ferromagnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Study on the Mechanism and Application of Applying Magnetic Barkhausen Noise to Evaluate Dislocation Density and Plastic Deformation

Kang¹,

Dong²,

Wang³

et al. 2020

Studies in Applied Electromagnetics and Mechanics

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Seven specimens of 45 steel with different residual strains were prepared by homogeneous plastic tensile test. The microstructure of the specimens was observed by scanning electron microscopy and the texture characteristics of the specimens were studied by X-ray diffraction. The results showed that plastic deformation mainly leads to dislocation increment in the microstructure rather than obvious deformed grain morphology, texture and residual stress. Then the dislocation density of each sample was calculated by X-ray diffraction method. The MBN signals of the samples were tested by magnetic Barkhausen noise method and the corresponding RMS (root mean square) values were calculated. The results showed that the dislocation density increases and the RMS value decreases with the increase of plastic deformation magnitude, the phenomenon was explained deeply. By establishing the correlation between dislocation density and RMS value, it was found that there was a good linear relationship between dislocation density and RMS value. According to the formula provided by the fitting curve, the dislocation density can be predicted by measuring the RMS value of any degree of plastic deformation.

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Using Barkhausen noise to measure coating depth of coated high-speed steel

Cited by 11 publications

References 37 publications

Investigation of Barkhausen Noise Emission in Steel Wires Subjected to Different Surface Treatments

Investigation of Barkhausen Noise Emission in Steel Wires Subjected to Different Surface Treatments

Design of advanced micro-magnetic sensors for various applications

Study on the Mechanism and Application of Applying Magnetic Barkhausen Noise to Evaluate Dislocation Density and Plastic Deformation

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