Surface decarburisation of steel detected by magnetic barkhausen emission

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

doi:10.1007/s10853-005-4240-5

Cited by 30 publications

(35 citation statements)

References 5 publications

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“…Conversely, a single-peaked profile transforms into a twopeaked one where decarburisation occurs as reported in Blaow and Shaw [31]. In addition, the height of the second peak at higher applied field strengths increased with increasing depths and the peak position shifted to lower field strengths.…”

Section: Introductionsupporting

confidence: 69%

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

Seemuang

Slatter

2017

Int J Adv Manuf Technol

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Coated high-speed steel tools are widely used in machining processes as they offer an excellent tool life to cost ratio, but they quickly need replacing once the coated layer is worn away. It would be therefore useful to be able to measure the tool life remaining non-destructively and cheaply. To achieve this, the work presented here aims to measure the thickness of the coated layer of high-speed cutting tools by using Barkhausen noise (BHN) techniques. Coated highspeed steel specimens coated with two different materials (chromium nitride (CrN), titanium nitride (TiN)) were tested using a cost-effective measuring system developed for this study. Sensory features were extracted from the signal received from a pick-up coil and the signal features, Root mean square, peak count, and signal energy, were successfully correlated with the thickness of the coating layer on high-speed steel (HSS) specimens. The results suggest that the Barkhausen noise measuring system developed in this study can successfully indicate the different thickness of the coating layer on CrN/TiN coated HSS specimens.

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Section: Introductionsupporting

confidence: 69%

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

Seemuang

Slatter

2017

Int J Adv Manuf Technol

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“…The detection of the case depth with Barkhausen noise measurement is based on the hardness difference of the surface (case) and the interior of the material. It is typical that two-peaks Barkhausen noise profiles are obtained with the first peak at lower applied field strength corresponding to the soft interior (bulk) and the second peak corresponding to the case [3,4] as shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 87%

“…The specimen was tempered at 190o C for 2 h (standard tempering used for gears) before testing. The MBE measurements were conducted using equipment developed in the authors' laboratory [4]. The detection of the case depth with Barkhausen noise measurement is based on the hardness difference of the surface (case) and the interior of the material.…”

Section: Methodsmentioning

confidence: 99%

“…Since the magnetic properties are very sensitive to material structural changes, magnetic measurements are potential techniques to be applied as non-destructive inspection methods for the detection of material changes. This makes it possible to determine the surface treatments applied to steel using magnetic Barkhausen noise (MBN) method [4]. Concerns have been raised over discrepancies between magnetic noise results, for example variations in the number and shape of BN peaks in different studies on very similar materials [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…As the carbon content increases, the intensity of MBN emission was found to decrease. In carburized and decarburized steels, hardness gradients are present [4,10,15,16]. This can cause two MBN intensity peaks to appear at different field strengths.…”

Section: Introductionmentioning

confidence: 99%

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