Off-line measurement of decarburization of steels using a multifrequency electromagnetic sensor

Hao, Xinjiang; Yin, Wuliang; Strangwood, Martin; Peyton, A. J.; Morris, P. F.; Davis, Claire

doi:10.1016/j.scriptamat.2008.01.042

Cited by 57 publications

(42 citation statements)

References 10 publications

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“…is the vacuum permeability [21][22][23][24]. Figure 4(a) and 4(b) show the temperature distribution around a thin cementite disk which is parallel and perpendicular to the electric current direction, respectively.…”

Section: Lamellar To Grain Nanostructure Transformationmentioning

confidence: 99%

Fabrication of nanostructured pearlite steel wires using electropulsing

Qin

Luo

Elliott-Bowman

et al. 2018

Materials Science and Technology

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This work reports the refinement of pearlite structure into nanostructure using electropulsing. Nanostructured pearlitic steel wires possess nanoscale lamellae or nanoscale grain microstructures. Fabrication of nanostructures by severe plastic deformation and lamellar to grain transformation have been investigated. It is suggested that an aligned pearlite structure is preferred in severe plastic deformation. The lamellar to grain transformation is controlled by diffusion of carbon within cementite and also from cementite to ferrite phases.Carbon mobility is changed by mechanical, thermal and electrical states. The interface between nanoscale sub-grains in the ferrite phase has considerable carbon content. Numerical calculations and experimental observations demonstrated these mechanisms.

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Section: Lamellar To Grain Nanostructure Transformationmentioning

confidence: 99%

Fabrication of nanostructured pearlite steel wires using electropulsing

Qin

Luo

Elliott-Bowman

et al. 2018

Materials Science and Technology

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“…In the case of a tool, the presence of this layer is crucial to its performance, and therefore assessment of the layer depth can be used to evaluate the remaining life. Metallographic analysis, subsurface micro-hardness measurement after cross-sectioning, and direct carbon content evaluation by chemical or spectrographic methods, are normally used to evaluate the case-depth [23]. These methods are destructive, are time-consuming to perform, and clearly cannot be used to evaluate any progressive reduction in the case depth 87 of a tool during its use [24].…”

Section: Introductionmentioning

confidence: 99%

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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“…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%