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.

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.

Correlation of Magnetic Barkhausen Noise with Microstructure in the In-Depth Direction of a Railhead

2014 ◽  
Vol 605 ◽  
pp. 677-680
Author(s):  
Charalampos Sokos
Keyword(s):  
Mechanical Properties ◽  
Vital Role ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Damage Initiation ◽  
Depth Direction ◽  
Non Destructive ◽  
Evaluation Techniques ◽  
Magnetic Steel

The characterization of microstructures, mechanical properties, deformation, damage initiation, and growth by Non-Destructive Evaluation techniques is assuming a vital role in various materials. In this paper, the use of Magnetic Barkhausen Noise technique for characterization of mechanical properties in magnetic steel would be discussed. The results have shown that hardening depth and its quality with respect to the microstructure in induction hardened specimens could also be established using the Magnetic Barkhausen Noise technique.

Characterization of Amorphous, Magnetic Fe-Si-B Ribbons

2013 ◽  
Vol 543 ◽  
pp. 476-478
Author(s):  
Eirini Varouti
Keyword(s):  
Structural Changes ◽  
Amorphous State ◽  
Barkhausen Noise ◽  
Chemical Compositions ◽  
Magnetic Barkhausen Noise ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Noise Measurements ◽  
Shed Light

The aim of this study is to contribute to a better understanding of the properties, structure and crystallization process of the amorphous Fe-based ribbon with the following chemical compositions: Fe80SixB20-x (x=5,6,8) and Fe75Si15B10. Thermal analysis, including Differential Scanning Calorimetry and Magnetic-Thermogravimetric Analysis, were used to shed light in the thermal stability and structural changes taking place during the transformation from the amorphous state to the crystalline state. The arising microstructure was observed via X-ray diffraction. Finally, Magnetic Barkhausen Noise measurements took place so as conclusions to be derived relevant to the dependence between the parameters of the Magnetic Barkhausen Noise and the chemical composition of the amorphous ribbons.

X-Ray Diffraction and Barkhausen Noise Diagnostics of Thick Welds Prepared by Metal Active Gas and Laser Welding

2016 ◽  
Vol 827 ◽  
pp. 113-116 ◽  
Author(s):  
Kamil Kolařík ◽  
Nikolaj Ganev ◽  
Karel Trojan ◽  
Ondřej Řídký ◽  
Lukáš Zuzánek ◽  
...  
Keyword(s):  
Noise Analysis ◽  
Real Structure ◽  
Barkhausen Noise ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Changes ◽  
Rs Analysis ◽  
Noise Diagnostics ◽  
Non Destructive ◽  
Power Diode

Non-destructive methods for detection and measurement of residual stresses (RS) have been increasingly used in the last few years. The paper outlines the capability of Barkhausen noise analysis (BNA) for evaluation of real structure changes and RS on cross-section of welds due to welding of ferromagnetic plates compared with X-ray diffraction (XRD). The purpose of this study is to evaluate the RS distribution of specimens joined using by high power diode laser and metal active gas (MAG) welding that can be used for quantitative analysis of macro and micro level RS separately. The principal advantages of BNA over XRD as a tool for RS analysis and real structure characterisation are that it is mobile, faster with more facile carrying out and hence BNA is frequently used for continuous monitoring of RS in industrial processes.

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.

Characterization of microstructures in 17-4-PH stainless steel by magnetic Barkhausen noise analysis

1993 ◽  
Vol 26 (3) ◽  
pp. 141-148 ◽  
Author(s):  
D.K. Bhattacharya ◽  
T. Jayakumar ◽  
V. Moorthy ◽  
S. Vaidyanathan ◽  
Baldev Raj
Keyword(s):  
Stainless Steel ◽  
Noise Analysis ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise

Characterization of the Residual Stresses in Plastically Deformed Ferrite-Martensite Steels Using Barkhausen Noise Measurements

2005 ◽  
Vol 500-501 ◽  
pp. 655-662 ◽  
Author(s):  
Xavier Kleber ◽  
Aurélie Hug-Amalric ◽  
Jacques Merlin
Keyword(s):  
Plastic Deformation ◽  
Tensile Stress ◽  
Residual Stresses ◽  
Barkhausen Noise ◽  
Opposite Behavior ◽  
Noise Measurements ◽  
Two Phases ◽  
Noise Signature ◽  
Compressive Residual Stresses

In this work, we show that the measurement of the Barkhausen noise allows the residual stresses in each of the two phases of ferrite-martensite steels to be characterized. We have first studied the effect of a tensile and a compressive stress on the Barkhausen noise signature. We observed that for a ferrite-martensite steel, the application of a tensile stress increases the Barkhausen activity of the martensite and ferrite phases, whereas a compressive one reduces it. In a second time, we induced residual stresses by applying a plastic deformation to ferrite-martensite steels. After a tensile plastic deformation, we observed that (i) compressive residual stresses appear in ferrite, and (ii) tensile residual stresses appear in martensite. An opposite behavior is observed after a compressive plastic deformation. These results show that the Barkhausen noise measurement makes it possible to highlight in a nondestructive way the distribution of the stresses in each of the two phases of a ferrite-martensite steel. This result could be used to characterize industrial Dual- Phases steels that are plastically deformed during mechanical processes.

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