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Studies of the contribution of alternating electromagnetic fields toward material fatigue in 100Cr6

Walter Holweger (Central Materials, Schaeffler Technologies GmbH & Co. KG, Herzogenaurach, Germany)
Marcus Wolf (Tribology/Fundamentals, Schaeffler Technologies GmbH & Co. KG, Herzogenaurach, Germany)
Frank Walther (Test Engineering (WPT), TU Dortmund University, Dortmund, Germany)
Werner Trojahn (Materials Technology Competence, Schaeffler Technologies GmbH & Co. KG, Herzogenaurach, Germany)
Annette Mütze (Institut für elektrische Antriebstechnik und Maschinen (EAM), TU Graz, Graz, Austria)
Jan Kunzmann (Smart Material GmbH, Dresden, Germany)
Jürgen Schreiber (Institute for Non‐destructive Testing, Fraunhofer‐Institut, Dresden, Germany)
Joachim Mayer (Gemeinschaftslabor für Elektronenmikroskopie der RWTH Aachen, RWTH Aachen, Aachen, Germany)
Manuela Reichelt (Gemeinschaftslabor für Elektronenmikroskopie der RWTH Aachen, RWTH Aachen, Aachen, Germany)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 10 August 2012

Abstract

Purpose

The purpose of this paper is to show how controlled exposure of electromagnetic fields toward bearing steel vulnerates the microstructure. The ability of Barkhausen Noise signal processing is used for detecting phenomena such as dislocation and subgrain formation processes as the beginning of later failures.

Design/methodology/approach

A Barkhausen noise signal measurement equipment is used for detecting subsurface distress of 100Cr6 as a function of the applied electromagnetic and mechanical stress. Barkhausen noise signal is mathematically processed by use of fractal dimension analysis.

Findings

The paper cleary reveals significant impact of electromagnetic field in junction with mechanical loading. Electromagnetic impact depends on the magnitude of the field.

Research limitations/implications

Research limitations are given by the fact that in real field applications, e.g. wind power plants, bearings are exposed by multiple influences and the methodology is not applicable to those conditions.

Practical implications

The methodology can be applied to real field applications in condition monitoring systems. Up to now, no reasonable on‐line measurement is in use determining sub surface fatigue phenomena. The paper hence, reveals the possibility to raise condition monitoring into a new perspective.

Originality/value

The use of Barkhausen noise signal processing, as presented here, is original with respect to real field applications, such as wind power plants with a high demand in condition monitoring, especially off‐shore plants.

Keywords

Citation

Holweger, W., Wolf, M., Walther, F., Trojahn, W., Mütze, A., Kunzmann, J., Schreiber, J., Mayer, J. and Reichelt, M. (2012), "Studies of the contribution of alternating electromagnetic fields toward material fatigue in 100Cr6", Industrial Lubrication and Tribology, Vol. 64 No. 5, pp. 247-252. https://doi.org/10.1108/00368791211249629

Publisher

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Emerald Group Publishing Limited

Copyright © 2012, Emerald Group Publishing Limited