Analysis of surface integrity of grinded gears using Barkhausen noise analysis and x-ray diffraction

2014 ◽  
Author(s):  
Lucie Vrkoslavová ◽  
Petr Louda ◽  
Jiři Malec
Keyword(s):  
Surface Integrity ◽  
Noise Analysis ◽  
Barkhausen Noise ◽  
X Ray Diffraction ◽  
X Ray

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.

The Attempt of New Approach to Evaluate Surface Integrity

2016 ◽  
Vol 368 ◽  
pp. 15-19
Author(s):  
Jiří Malec ◽  
Filip Červinka ◽  
Dominik Blažíček ◽  
Janne Suoknuuti
Keyword(s):  
Residual Stresses ◽  
Surface Integrity ◽  
Noise Analysis ◽  
Surface Damage ◽  
Noise Signal ◽  
Barkhausen Noise ◽  
X Ray Diffraction ◽  
Machined Surface ◽  
New Approach

Machined surface of hard steel parts like gears, bearings, camshafts etc. is full of local imperfections which are commonly described in terms of surface integrity. This surface integrity is usually quantified with the level of residual stresses or amplitude of Barkhausen noise signal for instance. The contribution introduces parameter called Sum of Effective Residual Stresses (SERS) to describe the level of surface damage after grinding. Experimental data obtained by X-Ray Diffraction (XRD) and Barkhausen Noise Analysis (BNA) methods of ground gears are shown. The way to use SERS approach for experimental determination of penetration depth of Barkhausen signal in steels is proposed, too.

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.

Waterjet Machining and Peening of Metals

1999 ◽  
Vol 122 (1) ◽  
pp. 90-95 ◽  
Author(s):  
M. Ramulu ◽  
S. Kunaporn ◽  
D. Arola ◽  
M. Hashish ◽  
J. Hopkins
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
Surface Integrity ◽  
Stress Fields ◽  
Abrasive Waterjet ◽  
Material Surface ◽  
X Ray Diffraction ◽  
X Ray ◽  
Waterjet Machining ◽  
Measurement And Evaluation

An experimental study was conducted to determine the influence of high-pressure waterjet (WJ) peening and abrasive waterjet (AWJ) machining on the surface integrity and texture of metals. A combination of microstructure analysis, microhardness measurements, and profilometry were used in determining the depth of plastic deformation and surface texture that result from the material removal process. The measurement and evaluation of residual stress was conducted with X-ray diffraction. The residual stress fields resulting from treatment were analyzed to further distinguish the influence of material properties on the surface integrity. It was found that waterjet peening induces plastic deformation at the surface layer of metals as good as shot peening. The degree of plastic deformation and the state of material surface were found to be strongly dependent on the peening conditions applied. [S0094-9930(00)00801-5]

scholarly journals Potential of magnetic Barkhausen noise analysis for in-process monitoring of surface layer properties of steel components in grinding

2020 ◽  
Vol 87 (12) ◽  
pp. 787-798
Author(s):  
Rahel Jedamski ◽  
Jonas Heinzel ◽  
Maximilian Rößler ◽  
Jérémy Epp ◽  
Jochen Eckebrecht ◽  
...  
Keyword(s):  
Surface Integrity ◽  
High Performance ◽  
Noise Analysis ◽  
Value Added ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Residual Stress State ◽  
Post Process ◽  
Grinding Machine ◽  
Process Measurements

AbstractGrinding processes are often the last step in the value-added chain of high-performance hardened steel components. However, thermo-mechanical loads which can take place during the process can have a detrimental effect on the surface integrity of ground parts, which are generally tested by post-process measurements. In the present study, two different approaches for an in-process inspection of the workpiece surface integrity were assessed using magnetic Barkhausen noise analysis during cylindrical grinding of hardened workpieces. The results showed that both measuring systems are able to detect changes in the surface state of workpieces in-process or directly after grinding in the grinding machine. After preparations to protect the sensors from influences during the grinding process, changes in the residual stress state and a decrease of hardness could be reliably detected. Due to constant contact conditions between sensor and workpiece a high reproducibility of the measurements was achieved.

scholarly journals Surface Integrity Inspection on Gears Using Barkhausen Noise Analysis

2011 ◽  
Vol 19 ◽  
pp. 162-171 ◽  
Author(s):  
B. Karpuschewski ◽  
O. Bleicher ◽  
M. Beutner
Keyword(s):  
Surface Integrity ◽  
Noise Analysis ◽  
Barkhausen Noise

Detection of Surface Damage after Grinding of Large Case–Hardened Bearing Rings

2013 ◽  
Vol 581 ◽  
pp. 205-210 ◽  
Author(s):  
Maria Čilliková ◽  
Miroslav Neslušan ◽  
Kamil Kolařík ◽  
Marián Mičúch
Keyword(s):  
Surface Integrity ◽  
Large Diameter ◽  
Surface Damage ◽  
Hardened Steel ◽  
Barkhausen Noise ◽  
X Ray ◽  
Dry Grinding ◽  
Reliable Detection ◽  
Bearing Rings ◽  
Large Case

This paper deals with detection of surface damage after grinding of bearing rings made of case hardened steel. Micromagnetic technique based on Barkhausen noise is adopted for monitoring of surface integrity during grinding rings of large diameter (1500 mm). Except micromagnetic testing, investigation of surface integrity is also expressed in such parameters as structure alterations, residual stresses measured via X - ray technique and microhardness measurement. It was found that Barkhausen noise technique enables reliable detection of surface integrity and damage induced by dry grinding and insufficient coolant supply can be easily distinguished.

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