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Fatigue and fretting fatigue behaviour of a railway axle steel A4T

 
: Varfolomeev, I.; Luke, M.; Burdack, M.

Bracciali, A. ; Centro Sviluppo Materiali -CSM-, Rom:
8th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems. Proceedings : 15th - 18th September 2009, Firenze, Italy
Firenze: AB Editore, 2009
ISBN: 978-88-904370-0-7
pp.539-542
International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM) <8, 2009, Firenze>
English
Conference Paper
Fraunhofer IWM ()
A4T steel; railway axles; numerical analysis

Abstract
This paper presents an experimental and numerical study on fretting fatigue behaviour of an A4T steel (25CrMo4) widely employed in the manufacturing of railway axles. First, standard S-N curves describing the material fatigue properties within both LCF and HCF regimes were experimentally derived. Subsequent fretting fatigue tests were carried out using loading parameters determined via numerical analyses. A comparison of both results series in terms of the SWT fatigue parameter applicable to multi-axial loading conditions suggests a high potential of the combined experimental and numerical approach for predicting crack initiation at fretting fatigue. Further issues - scatter in basic fatigue data, size effect, material and friction modelling - and their significance for the lifetime prediction are briefly addressed.

: http://publica.fraunhofer.de/documents/N-360577.html