Interaction between cracks and microstructure in three dimensions for rolling contact fatigue in railway rails

2013 ◽  
Vol 37 (3) ◽  
pp. 280-289 ◽  
Author(s):  
M. Schilke ◽  
N. Larijani ◽  
C. Persson
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Three Dimensions

scholarly journals Evolution of White Etching Bands in 100Cr6 Bearing Steel under Rolling Contact-Fatigue

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 491 ◽  
Author(s):  
Hanwei Fu ◽  
Pedro E. J. Rivera-Díaz-del-Castillo
Keyword(s):  
Plastic Strain ◽  
Stress Component ◽  
Rolling Contact Fatigue ◽  
Maximum Shear Stress ◽  
Contact Fatigue ◽  
Systematic Investigation ◽  
Bearing Steel ◽  
Rolling Contact ◽  
Three Dimensions ◽  
Microstructural Alterations

The formation of white etching bands (WEBs) occurs at the subsurface of rolling contact-fatigued bearing inner rings, exhibiting microstructural decay detrimental to bearing life. Despite the fact that WEBs have been observed in bearing steels for nearly 70 years, the understanding of WEB formation is still limited and mostly qualitative. Therefore, a systematic investigation is carried out in this research to reveal the evolution of WEBs with respect to the number of contact cycles. WEBs formed at different stages are reproduced by full-scale bearing RCF tests with predetermined numbers of cycles. Multi-scale characterisation techniques such as optical microscopy, micro-indentation, scanning and transmission electron microscopy and atomic force microscopy are conducted on the microstructural alterations to study the development and microstructure of WEBs. WEBs are found in the absence of dark etching regions which is attributed to the heat treatment. With an increasing number of cycles, WEBs grow in number density and in all three dimensions, and their formation is found to be controlled by the maximum shear stress component. Ferrite bands within WEBs that contain dislocation cells manifest accumulated plastic strain in the material. Based on the characterisation results, the evolution of plastic strain under RCF is quantified.

Rolling Contact Fatigue of Wheel and Rail

2012 ◽  
Vol 54 (5) ◽  
pp. 304-312
Author(s):  
Florian Dörner ◽  
Otto Kleiner ◽  
Christian Schindler ◽  
Peter Starke ◽  
Dietmar Eifler
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact

scholarly journals Hydrogen-assisted microcrack formation in bearing steels under rolling contact fatigue

2020 ◽  
Vol 134 ◽  
pp. 105485
Author(s):  
X.Z. Liang ◽  
G.-H. Zhao ◽  
J. Owens ◽  
P. Gong ◽  
W.M. Rainforth ◽  
...  
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Bearing Steels ◽  
Microcrack Formation
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