Microstructural dependence of Barkhausen noise and magnetic relaxation in the weld HAZ of an RPV steel

Park, Duck-Gun; Kim, Cheol Gi; Hong, Jiang

doi:10.1016/s0304-8853(00)00282-1

Cited by 9 publications

(5 citation statements)

References 7 publications

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“…The results show that the samples that suffered stress relief had higher MBN, due to the reduction of barriers to the movement of domain walls [5]. The lowest values of the MBN conditions cooled in water and oil are due the presence of martensite and bainite.…”

Section: Resultsmentioning

confidence: 90%

“…This is different from the situation found in cold water, where the values were very close in both directions, see fig.2b. For the oil cooled sample shown in figure2d, it is noted note that the beginning of the MBN for the analyzed conditions is very close and, as observed for the other samples, the samples had greater MBN values after stress relief.The results show that the samples that suffered stress relief had higher MBN, due to the reduction of barriers to the movement of domain walls[5]. The lowest values of the MBN conditions cooled in water and oil are due the presence of martensite and bainite.…”

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confidence: 90%

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Characterization of Residual Stresses and Microstructural by Technique of Magnetic Barkhausen Noise of API 5L X80 Steel Heat Treatment

Correa

Campos

Marcelo

et al. 2016

MSF

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Residual stresses typically are generated during the manufacturing process of mechanical components. The non-destructive techniques are quite sensitive to these residual stresses, and to microstructural changes resulting from thermal cycling. In this work, samples of API 5L X80 steel were exposed to several conditions of cooling, under water, air and oil, thus obtaining different microstructures and different levels of residual stresses. The residual stress measurements were made using the methods of Magnetic Barkhausen Noise and X-ray diffraction.

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Section: Resultsmentioning

confidence: 90%

mentioning

confidence: 90%

Characterization of Residual Stresses and Microstructural by Technique of Magnetic Barkhausen Noise of API 5L X80 Steel Heat Treatment

Correa

Campos

Marcelo

et al. 2016

MSF

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“…BN energy has also been used as a parameter in the literature to relate some phenomena: residual stress [12], differential elastic and plastic deformation [13], stress concentration due to the presence of defects [14] and microstructural state of the ferrite stainless steel [15]. While some researchers have used frequency spectrum of the signal to study the effect of grain size and grain boundary disorientation on BN [16], different microstructural region in weld HAZ [17], to distinguish different constituent of steel [18].…”

Section: Introductionmentioning

confidence: 99%

Barkhausen noise signal of different steels upon face-turning process

Vineet

Vashista

KhanYusufzai

2019

J Braz. Soc. Mech. Sci. Eng.

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This paper deals with understanding the effects of excitation field parameters on the nature of Barkhausen noise profile in order to improve the validity of Barkhausen noise results for the machining process. The experiment has been performed on total of four samples, two of high carbon steel and two of high carbon chromium steel. First, all samples are subjected to process annealing and later one sample of each steel was subjected to face-turning process. Barkhausen noise measurement was performed in two steps: first, magnetizing frequency varied and magnetic field intensity kept constant, and second, magnetic field intensity varied and magnetizing frequency kept constant. Magnetic Barkhausen noise profile is obtained by fitting Gaussian function to the root-mean-square distribution of the Barkhausen signal. The complicated behaviour of the profiles with frequency suggests optimum frequency determined statistically, which reflects the stochastic behaviour and can be applied to describe and control the face-turning process. The peak value of the profiles with amplitude of the sinusoidal magnetic field intensity has found to resemble exponential decay correlation.

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“…One of the MBN potentialities is its usefulness as a monitoring technique for detection of structural variations introduced by heat treatment or by the presence of defects in welded joints. Some studies of MBN in welding were done by using simulated weld microstructures by special designed heat treatments [16][17][18], while others have been accomplished in real-welded surfaces aiming to evaluate post-welding thermal treatment effects [19] or the wear performance of the welded joints [20][21]. This work presents the ability of the MBN for the identification of the microstructure gradient of actual A36 carbon steel welded joints.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of carbon steels welded joints by magnetic Barkhausen noise

Serna-Giraldo

Padovese

2015

Ingeniare. Rev. chil. ing.

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When a variable magnetic field is applied to a ferromagnetic material, it has been observed that, next to the coercive field (H c), rise in induction (B) takes place through abrupt jumps known as Barkhausen jumps. In this research, the microstructure variation in carbon steel welded joints was monitored by the Magnetic Barkhausen Noise (MBN). The samples were welded by SMAW process, in which both one-pass and two-pass were applied. Microhardness and microstructure were also characterized. The MBN signal was measured and analysed by means of several frequency and time domain parameters. Furthermore, maps of the welded steel surfaces were plotted. The variation of the MBN parameters was correlated to those of the microhardness and microstructure. The results allowed identifying a heat-affected zone (HAZ) of the welded joint using the MBN signals.

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Microstructural dependence of Barkhausen noise and magnetic relaxation in the weld HAZ of an RPV steel

Cited by 9 publications

References 7 publications

Characterization of Residual Stresses and Microstructural by Technique of Magnetic Barkhausen Noise of API 5L X80 Steel Heat Treatment

Characterization of Residual Stresses and Microstructural by Technique of Magnetic Barkhausen Noise of API 5L X80 Steel Heat Treatment

Barkhausen noise signal of different steels upon face-turning process

Monitoring of carbon steels welded joints by magnetic Barkhausen noise

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