Influence of uniaxial plastic deformation on magnetic Barkhausen noise in steel

2001 ◽  
Vol 34 (8) ◽  
pp. 507-514 ◽  
Author(s):  
A. Dhar ◽  
L. Clapham ◽  
D.L. Atherton
Keyword(s):  
Plastic Deformation ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise

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

2020 ◽  
Author(s):  
Xueliang Kang ◽  
Shiyun Dong ◽  
Hongbin Wang ◽  
Xiaoting Liu ◽  
Shixing Yan
Keyword(s):  
Plastic Deformation ◽  
Dislocation Density ◽  
Diffraction Method ◽  
Grain Morphology ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
X Ray Diffraction ◽  
X Ray ◽  
Texture Characteristics ◽  
Residual Strains

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.

Sharp Increase of Hysteresis Area Due to Small Plastic Deformation Studied With Magnetic Barkhausen Noise

2014 ◽  
Vol 50 (4) ◽  
pp. 1-4 ◽  
Author(s):  
Pedro P. de C Antonio ◽  
Marcos F. de Campos ◽  
Fabio M. da S Dias ◽  
Manuel Alberteris Campos ◽  
Julio Capo-Sanchez ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Sharp Increase ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Small Plastic ◽  
Small Plastic Deformation

Correlation between Barkhausen Noise and Plastic Deformation in TRIP 800 Steel Specimens

2011 ◽  
Vol 495 ◽  
pp. 205-208 ◽  
Author(s):  
Eirini Varouti
Keyword(s):  
Electron Microscopy ◽  
Plastic Deformation ◽  
Tensile Deformation ◽  
Tensile Loading ◽  
Barkhausen Noise ◽  
Micro Hardness ◽  
Magnetic Barkhausen Noise ◽  
Noise Parameters ◽  
Online Measurements ◽  
Scanning Electron

The aim of this study is to contribute to a better understanding of the dependence between Magnetic Barkhausen Noise and the plastic deformation of TRIP 800 steel samples. The TRIP 800 steel samples were subjected to increasing deformation by means of tensile loading and, meanwhile, Magnetic Barkhausen Noise parameters were measured (online measurements). Magnetic Barkhausen Noise parameters were, also, measured after the tensile deformation (offline measurements). The microstructure of the samples was studied by using Scanning Electron Microscopy and, finally, micro hardness and macro hardness measurements took place.

A study of plastic deformation around a defect using the magnetic Barkhausen noise in ASTM 36 steel

2008 ◽  
Vol 41 (1) ◽  
pp. 53-58 ◽  
Author(s):  
J.A. Perez-Benitez ◽  
J. Capo-Sanchez ◽  
J. Anglada-Rivera ◽  
L.R. Padovese
Keyword(s):  
Plastic Deformation ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise

scholarly journals Non-Destructive Characterization of Subsurface Plastic Deformation in Case Carburized Steel Using Magnetic Barkhausen Noise Technique

2019 ◽  
Vol 4 (12) ◽  
pp. 126-131
Author(s):  
Mohamed M. Blaow ◽  
Mohamed Ali Ballem ◽  
Brian Andrew Shaw
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Cross Sections ◽  
High Stress ◽  
Peak Height ◽  
Considerable Change ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Tension And Compression ◽  
Second Peak

The effect of extreme loading in bending was investigated by magnetic Barkhausen Noise (MBN) and X-ray diffraction (XRD) in two types of inhomogeneous steels that widely used in gear industry. EN 36 and H8620 steels in the carburized, tempered and ground condition were investigated after unloading from high stress levels. The inhomogeneity arising from the variation in carbon content showed up clearly by double peaks MBN profiles before loading. The first MBN peak at low field revealed the soft subsurface region and the second peak at higher field revealed the hard surface layer. Residual stresses profiles were produced by XRD before and after loading to probe plasticity in the cross sections of both specimens. Barkhausen noise measurements showed a considerable change in the first peak height in both steels as a response to plastic deformation in tension and compression in the subsurface material. The height of the second peak remained unchanged in EN 36 specimen but increased slightly in the H8620 specimen.  The residual stress measurements after unloading indicated that the subsurface materials after a depth of 0.4 mm in both specimens were yielded. The surface layer of the H8620 steel was also affected slightly by bending as revealed by an increase in the second MBN peak height and confirmed by XRD as indication of yielding. The experiment confirmed that the magnetic Barkhausen noise can be used to characterize yielding in inhomogeneous steels non-destructively.

scholarly journals Comparison of Synchrotron Radiation Diffraction and Micromagnetic Stress Analysis in Straightened Steel Pipes

2014 ◽  
Vol 777 ◽  
pp. 225-230
Author(s):  
Sascha Raatz ◽  
Michael Kaack ◽  
Peter Staron ◽  
Norbert Schell ◽  
Andreas Schreyer ◽  
...  
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
High Energy ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Industrial Environment ◽  
Steel Pipes ◽  
Compressive Stresses ◽  
Synchrotron Radiation Diffraction ◽  
Pipe Manufacturing

The use of magnetic Barkhausen noise (MBN) and harmonic analysis (HA) as non-destructiveevaluation (NDE) techniques in the industrial environment increased in the last years. In our study,we evaluated the potential of those methods to measure residual stress on the surface of straightenedsteel pipes. To study the influence of the pipe manufacturing process and the following straighteningprocess we used pipes of three different straightening levels. The straightening was done with differentparameters, which resulted in a plastic deformation that leaves a visible helix on the surface of thepipes. High energy diffraction experiments were performed to obtain absolute values of residual stresson the surface and in the bulk of the pipe samples. With these residual stress values our MBN and HAdata was calibrated. The surface of all pipes showed high compressive stresses while the highest tensilestresses were 0.5 to 1.4 mm under the surface. The stresses correlate to greater plastic deformationduring the straightening process.

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