Optimized laser processing of calibration blocks for grinding burn detection with Barkhausen noise

Santa-aho, Suvi; Vippola, Minnamari; Sorsa, Aki; Lindgren, Mari; Latokartano, Jyrki; Leiviskä, Kauko; Lepistö, Toivo

doi:10.1016/j.jmatprotec.2012.07.002

Cited by 17 publications

(9 citation statements)

References 11 publications

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“…1,2) This kind of material requires the hard surface layer, so mechanical surface treatment is often used to improve the surface quality and shot peening (SP) is one of the most commonly used methods. 3,4) In the process of SP, the impact indentations of the shot induce local plastic deformation at the surface, which can create the beneficial compressive residual stress (CRS), increase the dislocation population and induce both the microstructure change and work hardening near the surface layer.…”

Section: Introductionmentioning

confidence: 99%

“…Now, the researches about 18CrNiMo7-6 steel have almost focused on the mechanical property and micro-structure characterization at ambient temperature. 3,4,12,13) But little investigation was made on the characterization about the recovery, recrystallization behavior and thermostability of 18CrNiMo7-6 steel after SP at increased temperatures. Meanwhile, X-ray diffraction line profile analysis (XRDLPA) is a well-known reliable and non-destructive technique.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural Evolution and Mechanical Response of the Surface of 18CrNiMo7-6 Steel after Multistep Shot Peening during Annealing

Jiang

Ji³

2013

Mater. Trans.

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The variations of micro-structure, residual stress and micro-hardness for 18CrNiMo7-6 steel after triple shot peening (SP) against annealing temperature were studied. X-ray diffraction line profile analysis (XRDLPA) was used to identify the change of micro-structure and residual stress relaxation behaviors of the top surface for 18CrNiMo7-6 steel after SP. The results show that the micro-strain, dislocation density, stored energy, compressive residual stress (CRS) and micro-hardness of the top surface of 18CrNiMo7-6 steel after SP decrease with the increase of annealing temperature while the domain size increases with increasing annealing temperature. Meanwhile, the change rates of micro-structure the residual stress and micro-hardness are bigger at higher annealing temperatures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Mechanical Response of the Surface of 18CrNiMo7-6 Steel after Multistep Shot Peening during Annealing

Jiang

Ji³

2013

Mater. Trans.

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“…Conventional high frequency BN measurements are typically used for grinding burn detection [12,14]. The present authors have also studied manufacturing and detection of artificial grinding burns [15][16][17]. In these studies high frequency BN was applied and found applicable.…”

Section: Introductionmentioning

confidence: 94%

Barkhausen noise-magnetizing voltage sweep measurement in evaluation of residual stress in hardened components

Santa-aho

Sorsa

Hakanen

et al. 2014

Meas. Sci. Technol.

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In this study, Barkhausen noise (BN) magnetizing voltage sweep (MVS) measurement is used to evaluate non-destructively the surface residual stress state of hardened components. A new computational feature, where the maximum slope of the sweep is divided by the corresponding magnetizing voltage, is introduced. The results show that this feature has a linear relationship with the residual stress state of the samples. The determination of residual stresses during online production of components is a highly recognized task because tensile stresses may be detrimental to the component. In this study, two sets of hardened samples are used in the analysis. A linear relationship is observed in each sample set indicating that the new feature is applicable in assessment of surface residual stresses of the components.

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“…The investigations show that a correct interpretation of the BN signal as well as other micromagnetic parameters requires calibration on the basis of good and bad parts, even for a qualitative evaluation. The surface and subsurface condition of these parts must be exactly defined with alternative test methods and assigned to the respective BN level [18]. The reason for this is the fact that the surface and subsurface state is defined by different surface and subsurface properties (e.g., residual stress state, hardness, microstructure), so that changes in several properties simultaneously cause overlapping micromagnetic effects.…”

Section: Micromagnetic Barkhausen Noise Analysismentioning

confidence: 99%

Micromagnetic Analysis of Thermally Induced Influences on Surface Integrity Using the Burning Limit Approach

Heinzel

Sackmann

Karpuschewski

2019

JMMP

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Particularly for highly stressed components, it is important to have precise knowledge of the surface and subsurface properties and, thus, of the functional properties after final grinding at the end of a complex process chain in order to avoid rejected parts. Therefore, non-destructive testing methods have been the subject of research for several years. The Barkhausen noise analysis, as a micromagnetic measuring method, has the potential to characterize the subsurface area up to an analyzing depth δ non-destructively with micromagnetic parameters. In addition to micromagnetic multiparameter approaches, which allow post-process mode clear statements about the subsurface area state, the present research work deals with the concept of a connection of a single Barkhausen noise parameter with grinding process parameters. In combination with the analytical approach of Malkin for the thermal surface and subsurface area influence, which is based on the process parameters of grinding processes, a distinction between good and rejected ground parts can be achieved. The results show that, by post-process measurements of the Barkhausen noise on case-hardened workpieces made of steel 18CrNiMo7-6 (No. 1.6587, AISI 4820) and machined by a cylindrical grinding process, incipient changes in the residual stress state up to industrial-relevant limits, which distinguish between good and rejected parts, is possible. In the future, a combination of the Malkin grinding burning limit and sufficient condition monitoring based on in-process measurements of Barkhausen noise will be investigated. The application limits of the analytical approach of Malkin as well as the measurement of the Barkhausen noise in-process have to be determined.

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Optimized laser processing of calibration blocks for grinding burn detection with Barkhausen noise

Cited by 17 publications

References 11 publications

Microstructural Evolution and Mechanical Response of the Surface of 18CrNiMo7-6 Steel after Multistep Shot Peening during Annealing

Microstructural Evolution and Mechanical Response of the Surface of 18CrNiMo7-6 Steel after Multistep Shot Peening during Annealing

Barkhausen noise-magnetizing voltage sweep measurement in evaluation of residual stress in hardened components

Micromagnetic Analysis of Thermally Induced Influences on Surface Integrity Using the Burning Limit Approach

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