Magnetic Barkhausen noise: stress-dependent mechanisms in steel

1996 ◽  
Vol 32 (5) ◽  
pp. 4764-4766 ◽  
Author(s):  
T.W. Krause ◽  
N. Pulfer ◽  
P. Weyman ◽  
D.L. Atherton
Keyword(s):  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Noise Stress ◽  
Stress Dependent

Stress State Determination in Boat Welding Using Magnetic Barkhausen Noise

2014 ◽  
Vol 605 ◽  
pp. 633-636
Author(s):  
Kaliopi Hliadi
Keyword(s):  
Stress State ◽  
Ferromagnetic Materials ◽  
Physical Principle ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Destructive Testing ◽  
Magnetic Techniques ◽  
Stress Dependent ◽  
The Impact ◽  
Non Destructive

The impact of stress on changes in magnetization is one of the most complex issues of magnetism. Magnetic techniques are the most important non-destructive testing technologies to characterize the mechanical features of ferromagnetic materials based on the physical principle of magnetic-stress coupling. Magnetic Barkhausen Noise measurement was used in order to estimate stress state in boat welding. The results have shown that magnetic properties of ferromagnetic materials are stress-dependent. A qualitative correlation was found between places with residual stress and areas with increased values of the gradients of the magnetic Barkhausen noise components. Further research is now in progress in order to develop the quantitative relationships.

Investigation of the stress-dependent magnetic easy axis in steel using magnetic Barkhausen noise

1996 ◽  
Vol 79 (8) ◽  
pp. 4242 ◽  
Author(s):  
Thomas W. Krause ◽  
L. Clapham ◽  
Andras Pattantyus ◽  
David L. Atherton
Keyword(s):  
Easy Axis ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Magnetic Easy Axis ◽  
Stress Dependent

scholarly journals Time-Response-Histogram-Based Feature of Magnetic Barkhausen Noise for Material Characterization Considering Influences of Grain and Grain Boundary under In Situ Tensile Test

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2350
Author(s):  
Jia Liu ◽  
Guiyun Tian ◽  
Bin Gao ◽  
Kun Zeng ◽  
Yongbing Xu ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Tensile Stress ◽  
Material Properties ◽  
Ferromagnetic Material ◽  
Silicon Steel ◽  
Time Response ◽  
Barkhausen Noise ◽  
Time Interval ◽  
Magnetic Barkhausen Noise

Stress is the crucial factor of ferromagnetic material failure origin. However, the nondestructive test methods to analyze the ferromagnetic material properties’ inhomogeneity on the microscopic scale with stress have not been obtained so far. In this study, magnetic Barkhausen noise (MBN) signals on different silicon steel sheet locations under in situ tensile tests were detected by a high-spatial-resolution magnetic probe. The domain-wall (DW) motion, grain, and grain boundary were detected using a magneto-optical Kerr (MOKE) image. The time characteristic of DW motion and MBN signals on different locations was varied during elastic deformation. Therefore, a time-response histogram is proposed in this work to show different DW motions inside the grain and around the grain boundary under low tensile stress. In order to separate the variation of magnetic properties affected by the grain and grain boundary under low tensile stress corresponding to MBN excitation, time-division was carried out to extract the root-mean-square (RMS), mean, and peak in the optimized time interval. The time-response histogram of MBN evaluated the silicon steel sheet’s inhomogeneous material properties, and provided a theoretical and experimental reference for ferromagnetic material properties under stress.

Schadenserfassung auf Radsatzlaufflächen/Defect detection on wheelset treads – Measurement of Magnetic Barkhausen Noise to detect varying workpiece conditions

2019 ◽  
Vol 109 (11-12) ◽  
pp. 811-815
Author(s):  
B. Denkena ◽  
B. Bergmann ◽  
H. Blech
Keyword(s):  
Acoustic Emission ◽  
Process Parameters ◽  
Defect Detection ◽  
Material Properties ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Optimal Process ◽  
Process Reliability

Unterschiedliche Belastungshistorien von Eisenbahnrädern führen zu Werkstoffveränderungen in der Lauffläche. Diese verursachen sporadisches Werkzeugversagen und verringern so die Prozesssicherheit. Die Messung der Material- und Prozesseigenschaften mit Barkhausenrauschen und Körperschall erlauben, individuelle Bearbeitungsparameter für jedes Exemplar festzulegen. Gezeigt werden die Herausforderungen in der Radsatzbearbeitung, und welche Informationen sich durch die Messtechniken gewinnen lassen.   Different load histories of train wheels lead to high variance of material properties on the running tread. Those cause unpredictable tool break and reduce process reliability. The measurement of magnetic Barkhausen noise and acoustic emission allow to gain information of the workpiece and the running process, to find optimal process parameters for the reconditioning of every individual wheel. Typical issues in train wheel machining and results of measurements are presented.

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