scholarly journals Experimental Consideration of Conditions for Measuring Residual Stresses of Rails Using Magnetic Barkhausen Noise Method

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5374
Author(s):  
Young-In Hwang ◽  
Yong-Il Kim ◽  
Dae-Cheol Seo ◽  
Mu-Kyung Seo ◽  
Woo-Sang Lee ◽  
...  
Keyword(s):  
Residual Stresses ◽  
High Speed ◽  
Barkhausen Noise ◽  
Noise Band ◽  
Magnetic Barkhausen Noise ◽  
Continuous Increase ◽  
Fracture Characteristics ◽  
Fatigue And Fracture ◽  
The Difference ◽  
Number Of Passes

Residual stress, a factor affecting the fatigue and fracture characteristics of rails, is formed during the processes of fabrication and heat treatment, and is also generated by vertical loads on wheels due to the weight of vehicles. Moreover, damage to rails tends to accelerate due to the continuous increase in the number of passes and to the high speed of passing vehicles. Because this can have a direct effect on safety accidents, having a technique to evaluate and analyze the residual stresses in rails accurately is very important. In this study, stresses due to tensile loads applied to new rails and residual stresses remaining in used rails were measured by using magnetic Barkhausen noise method. First, a magnetization frequency and noise band suitable for the rails were selected. Moreover, by applying tensile loads to specimens and comparing the difference in magnetization amplitudes for each load, the stresses applied to the rails by using the magnetic Barkhausen noise method were measured, and the analysis of the results was verified. Based on these results, the difference in the results for the loads asymmetrically applied according to the wheel shape was analyzed by measuring for the head parts of used rails.

Nondestructive Monitoring of Variations of Residual Stresses in Steel Weldments by Magnetic Barkhausen Noise Method

2013 ◽  
Author(s):  
C. Hakan Gür ◽  
Gökhan Erian ◽  
Caner Batıgün ◽  
İbrahim Çam
Keyword(s):  
Residual Stresses ◽  
Calibration Procedure ◽  
Steel Plates ◽  
Barkhausen Noise ◽  
Nondestructive Monitoring ◽  
Magnetic Barkhausen Noise ◽  
X Ray Diffraction ◽  
Critical Data ◽  
Surface Residual Stresses ◽  
Welding Processes

Variations of surface residual stresses as a function of weld runs in API 5L X70 steel plates were non-destructively monitored by Magnetic Barkhausen Noise (MBN) method. After each weld run, MBN signal and hardness distributions were recorded. MBN signals were converted into stress values by using a specific calibration procedure. The results were analyzed by considering microstructure investigations and hardness measurements, and then, they were compared with the results of X-ray diffraction measurements. MBN method seems to be a good candidate for monitoring the variation of surface residual stresses. It may also provide critical data for computer simulation and process design of welding processes.

Residual Stresses Distribution Calculation of the Cu-Cr-Zr Alloy Contact Wire Used in High-Speed Electrical Railway

2011 ◽  
Vol 189-193 ◽  
pp. 2076-2080
Author(s):  
Yong Liu ◽  
Xin Long Liu ◽  
Bao Hong Tian
Keyword(s):  
Residual Stresses ◽  
Strain Distribution ◽  
Legendre Polynomials ◽  
High Speed ◽  
Beam Test ◽  
Contact Wire ◽  
Distribution Calculation ◽  
The Difference ◽  
Deformation Treatment ◽  
Zr Alloy

According to the strain distribution test data through the rectangle bent beam test, the crack compliance method (CCM) using the Legendre polynomials as the interpolation was employed to measure the residual stresses distribution in the Cu-Cr-Zr alloy contact wire which used in high-speed electrical railway after soluted or soluted-aged-various deformation treatment. The results show that the residual stresses would release, and after soluted-aged-deformation treatment the difference of the residual stresses between the surface and the sub-surface would be dropped into a low level range about 80 MPa from 780 MPa with the same residual stresses distribution direction in the Cu-Cr-Zr alloy contact wire. The Cu-Cr-Zr alloy contact wire prepared process in four steps are as bellow: soluted at 950°C for 1 hour, pre-deformed for 40% ratio, aged at 480°C for 2 hours, and subsequent the second deformed for 75% ratio.

Determination of surface residual stresses in carburised AISI 8620 steel by the magnetic Barkhausen noise method

2020 ◽  
Vol 62 (7) ◽  
pp. 416-421
Author(s):  
T Kaleli ◽  
C Hakan Gür
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Stress Measurement ◽  
Fatigue Behaviour ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Surface Residual Stress ◽  
Technical Requirements ◽  
Surface Residual Stresses

Management of the residual stress state is vital for the design and production stages of carburised components in order to satisfy the technical requirements related to performance, fatigue behaviour and useful lifetime. This enforces the use of practical, reliable and time- and cost-effective stress measurement methods by manufacturers. This study aims to investigate the efficiency of the magnetic Barkhausen noise (MBN) method in rapid non-destructive determination of surface residual stresses in carburised steels. A series of AISI 8620 steel specimens with different residual stress states was prepared by altering the carburising and subsequent tempering parameters. The specimens were characterised through scanning electron microscopy (SEM) investigations and hardness measurements, and the surface residual stresses were determined using both the MBN and X-ray diffraction (XRD) methods. The results show that a good correlation exists between surface residual stress and the parameters derived from the MBN signals.

COMPARATIVE STUDY OF RESIDUAL STRESSES IN GRINDING OF P91 STEEL BY X-RAYS DIFFRACTION AND MAGNETIC BARKHAUSEN NOISE TECHNIQUES

2019 ◽  
Author(s):  
Maria Cindra Fonseca ◽  
Gabriele Magalhães de Paula ◽  
Leosdan Figueredo Noris ◽  
Matheus Muntzberg ◽  
Bernardo Moniz de Aragão ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Comparative Study ◽  
Barkhausen Noise ◽  
X Rays ◽  
Magnetic Barkhausen Noise ◽  
P91 Steel

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

2016 ◽  
Vol 869 ◽  
pp. 556-561 ◽  
Author(s):  
Sandro Rosa Correa ◽  
Marcos Flavio de Campos ◽  
C.J. Marcelo ◽  
José Adilson de Castro ◽  
Maria Cindra Fonseca ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
X Ray Diffraction ◽  
X80 Steel ◽  
Work Samples ◽  
Non Destructive ◽  
Different Levels ◽  
Steel Heat

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.

Investigating the correlation between magnetic Barkhausen noise emission and the fatigue life of shot-peened AISI 4140 steel

2019 ◽  
Vol 61 (12) ◽  
pp. 701-705
Author(s):  
S Çalışkan ◽  
C Hakan Gür
Keyword(s):  
Residual Stress ◽  
Fatigue Life ◽  
Residual Stresses ◽  
Shot Peening ◽  
Critical Parameters ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Surface Residual Stress ◽  
Aisi 4140 Steel ◽  
Aisi 4140

The performance of engineering components under conditions of fatigue can be improved by shot peening. The location and magnitude of the highest residual compressive stress, the depth of the compression zone and the stability of the residual stress state during cyclic loading are critical parameters for maximum utilisation of the advantageous influence of shot peening on fatigue performance. For accurate assessment of fatigue lifetime, residual stresses should be considered because they are algebraically summed with applied stresses. Therefore, the development of a non-destructive testing (NDT) method that has the ability to rapidly monitor surface residual stresses has industrial importance when verifying the achievement of the design goals of shot peening. The utilisation potential of the magnetic Barkhausen noise (MBN) technique in shot peening of ferromagnetic steels includes automated sorting of the components and measurement of surface residual stress. This study aims to establish the correlation between MBN emission and the fatigue life of shot-peened AISI 4140 steel.

Evaluation of Fatigue and Fracture Characteristics of High-Speed Rail Material

2017 ◽  
Vol 34 (12) ◽  
pp. 861-866
Author(s):  
Jung Won Seo ◽  
Seok Jin Kwon ◽  
Hyun Kyu Jun ◽  
Dong Hyeong Lee
Keyword(s):  
High Speed ◽  
High Speed Rail ◽  
Fracture Characteristics ◽  
Fatigue And Fracture
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