Investigation of the Formation of White Etching Layers and Residual Stresses in Railway Rails
- Dr. P. J. Winkler
Published Online: 23 DEC 2005
Copyright © 2000 Wiley-VCH Verlag GmbH, Weinheim
Materials for Transportation Technology, Volume 1
How to Cite
Pyzalla, A., Wild, E. and Reimers, W. (2000) Investigation of the Formation of White Etching Layers and Residual Stresses in Railway Rails, in Materials for Transportation Technology, Volume 1 (ed P. J. Winkler), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606025.ch55
DaimlerChrysler AG, Forschung und Technologie, Postfach 800 465, 81663 München, Germany; Tel.: 089–607 22393; Fax: 089–607 28627
- Published Online: 23 DEC 2005
- Published Print: 20 APR 2000
Print ISBN: 9783527301249
Online ISBN: 9783527606023
- transportation technology;
- railway rails;
- formation of white etching layers;
- residual stresses
The increase of axle loads in freight traffic as well as the increase in velocity of passenger trains within recent years have lead to an increase of wear of the rails, that appears e.g. in an increase of frequency of structure modifications and defects in the rails surface layer. Among the structure modifications, especially the riffles and the, white-etching-layers' (named according to their resistance towards metallographic etching) are of high practical as well as theoretical interest.
The practical aspect is that the white etching layers, especially the riffle bands result in an increase of the vibration of the trains so that the rails have to be ground subsequently, which is very costly for the operating companies.
The theoretical aspect is that the white etching layers have a hardness that reaches up to 1200 HV and especially the fact that the composition and crystallographic structure of the white etching layers as well as the process of their formation still is under vivid discussion.
Here, the microstructural changes induced by the loading of the rail are investigated by X-ray profile, texture and residual stress analyses. In order to trace the microstructural change with the amount of loading measurements are performed on different sites of a piece of rail, which was used and provided by the Deutsche Bahn AG.