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Forschung im Ingenieurwesen
Published in: Forschung im Ingenieurwesen 4/2018

27-09-2018 | Originalarbeiten/Originals

Tribological research on the development of White Etching Cracks (WECs)

Authors: Florian Pape, Jan Torben Terwey, Sebastian Wiesker, Stefan Averbeck, Christian Muhmann, Dieter Lipinsky, Heinrich F. Arlinghaus, Eberhard Kerscher, Bernd Sauer, Gerhard Poll

Published in: Forschung im Ingenieurwesen | Issue 4/2018

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Abstract

The aim of the presented research activities was to identify mechanical, thermal, and chemical factors possibly linked to the formation of WECs (White Etching Cracks). By means of a systematic variation of various influencing parameters, the significance of each of those was investigated. It is hoped that, once the parameters promoting WECs have been identified, the physical and chemical mechanisms responsible for WEC can be thoroughly understood in the near future. This would allow to prevent costly premature bearing failures, e. g. given in wind turbines.
Four research centers in Kaiserslautern, Münster and Hannover (Institute of Machine Elements, Gears and Transmissions (MEGT), Technische Universität Kaiserslautern, Materials Testing Group (AWP), Technische Universität Kaiserslautern, Institute of Physics, Westfälische Wilhelms-Universität Münster, and Institute for Machine Design and Tribology (IMKT), Leibniz University Hannover) provide their expertise and laboratory facilities for this purpose.
At IMKT full bearing investigations with cylindrical roller thrust bearings and model tests with a special ring-roller-ring tribometer were performed under varied test conditions. In a theoretical work package, the stresses induced to the bearing surface were simulated.
At “Physikalisches Institut” in Münster surfaces of the bearing washers (and rolling elements) were analysed applying Time-of-Flight secondary ion mass spectrometry (ToF-SIMS) to determine the actual respective chemical composition of the tribofilms.
At MEGT component tests were carried out on a three-axis dynamic test rig with radially loaded cylindrical roller bearings. The internal bearing dynamics and, above all, the associated distribution of frictional energy were analysed by means of multi-body simulation.
The AWP concentrated on synthesized multi-axial dynamic stresses aimed at mirroring the stresses in a rolling contact apllied on laboratory test specimens to investigate crack initiation and growth in depth.
previous article Stiff and soft active control of friction by vibrations and their energy efficiency
next article Nichtlineare, inverse Parameteridentifikation zur TEHD-Simulation von geschmierten Kontakten bei hohen Druckgradienten

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Metadata
Title
Tribological research on the development of White Etching Cracks (WECs)
Authors
Florian Pape
Jan Torben Terwey
Sebastian Wiesker
Stefan Averbeck
Christian Muhmann
Dieter Lipinsky
Heinrich F. Arlinghaus
Eberhard Kerscher
Bernd Sauer
Gerhard Poll
Publication date
27-09-2018
Publisher
Springer Berlin Heidelberg
Published in
Forschung im Ingenieurwesen / Issue 4/2018
Print ISSN: 0015-7899
Electronic ISSN: 1434-0860
DOI
https://doi.org/10.1007/s10010-018-0289-6

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