Microstructural Alterations in Rolling Contact Fatigue

2009 ◽  
pp. 74-74-15
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Microstructural Alterations

Effect of Residual Stresses on Microstructural Evolution Due to Rolling Contact Fatigue

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Dallin Morris ◽  
Farshid Sadeghi ◽  
Yong-Ching Chen ◽  
Chinpei Wang ◽  
Ben Wang
Keyword(s):  
Finite Element ◽  
Phase Transformations ◽  
Damage Mechanics ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Internal Stresses ◽  
Microstructural Alterations ◽  
Bearing Steels ◽  
Deep Groove

Rolling contact fatigue (RCF) induces a complex subsurface stress state, which produces significant microstructural alterations within bearing steels. A novel modeling approach is presented in this paper, which investigates the effects of microstructural deterioration, phase transformations, and residual stress (RS) formation occurring within bearing steels subject to RCF. The continuum damage mechanics approach was implemented to capture microstructural decay. State and dissipation functions corresponding to the damage mechanics process were used via an energy criterion to predict the phase transformations of retained austenite (RA). Experimental measurements for RA decomposition and corresponding RS were combined to produce a function providing RS formation as a function of RA decomposition and stress history within the material. Microstructural decay, phase transformations, and internal stresses were implemented within a two-dimensional (2D) finite element analysis (FEA) line contact model to investigate variation in microstructural alterations due to RSs present within the material. In order to verify the model developed for this investigation, initial simulations were performed implementing conditions of previously published experimental work and directly comparing to observed RA decomposition and RS formation in 52100 steel deep groove ball bearings. The finite element model developed was then used to implement various RS profiles commonly observed due to manufacturing processes such as laser-shot peening and carburizing. It was found that some RS profiles are beneficial in altering RA decomposition patterns and increasing life while others proved less advantageous.

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
Sign in / Sign up

Export Citation Format

Share Document