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http://dx.doi.org/10.14346/JKOSOS.2017.32.1.15

Effect of Water Contamination of the Lubricant and Surface Roughness of Bearing Steel on the Rolling Contact Fatigue Life  

Heo, Tae Hyeon (Department of Mechanical Engineering, Graduate School, Seoul National University of Science and Technology)
Sim, Chung-Ki (Department of Mechanical Engineering, Graduate School, Seoul National University of Science and Technology)
Kim, Hong Seok (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
Shin, Ki-Hoon (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
Cheong, Seong Kyun (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of the Korean Society of Safety / v.32, no.1, 2017 , pp. 15-20 More about this Journal
Abstract
A large amount of research has been performed on the rolling contact fatigue(RCF) life of bearings, since it directly affects the safety and reliability of mechanical systems. It is well known that rolling contact fatigue life is influenced by several parameters including contact pressure, oil contamination by water or metal particles, and the surface conditions of bearings. However, the detailed damage mechanisms involved in rolling contact fatigue have not been clearly identified yet. In this paper the effects of water contamination of the lubricant and surface roughness of bearing steel on the rolling contact fatigue life were investigated. Two types of specimens with different surface roughness values were prepared through turning and lapping operations. They were tested under two different lubrication conditions, i.e. oil lubricant with 100% of oil and the water contaminated condition with 80% of oil and 20% of water using the rolling contact fatigue testing machine. The surface damage induced by the rolling contact fatigue was observed by using atomic force microscope(AFM). Experimental results show that the rolling contact fatigue life, $L_{10}$ was reduced by 24 to 33% depending on the lubrication condition. The reduction of fatigue life in the range of 53 to 57% was also observed at different surface roughness conditions.
Keywords
rolling contact fatigue; water contamination; surface roughness; atomic force micro scope; safety; bearing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 W. Barrois, "Repeated Plastic Deformation as a Cause Mechanical Surface Damage in Fatigue, Wear, Frettingfatigue, and Rolling Fatigue", International Journal of Fatigue, Vol. 4, pp. 157-189, 1979.
2 K. L. Johnson, Contact Mechanics, Cambridge University Press, 1985.
3 A.V. Olver, "The Mechanism of Rolling Contact Fatigue: an Update", Proc. IMechE, Vol. 219, Part J: J. Engineering Tribology, pp. 313-328, 2005.   DOI
4 F. Sadeghi, B. Jalalahmadi, T. S. Slack, N. Raje and N. K. Arakere, "A Review of Rolling Contact Fatigue", Journal of Tribology, Vol. 131, pp. 1-15, 2009.
5 D. Mahdi, A. Riches, M. Gester, J. Yeomans and P. Smith, "Rolling Sliding: Separation of Adhesion and Deformation Friction and Their Relative Contribution to Total Friction", Tribology International, Vol. 89, pp. 128-134, 2015.   DOI
6 R. S. Sayles and P. B. Macpherson, "Influence of Wear Debris on Rolling Contact Fatigue", ASTM STP 771, pp. 255-274, 1982.
7 Y. B. Guo and A. W. Warren, "The Impact of Surface Integrity by Hard Turning vs. Grinding on Fatigue Damage Mechanisms in Rolling Contact", Surface & Coatings Technology, Vol. 203, pp. 291-299, 2008.   DOI
8 P. Schatzberg and I. M. Felsen, "Effects of Water and Oxygen During Rolling-Contact Lubrication", Wear, Vol. 12, pp. 331-342, 1968.   DOI
9 I. M. Felsen and P. Schatzberg, "Influence of Water on Fatigue-Failure Location abd Surface Alteration during Rolling Contact Lubrication", Journal of Lubrication Technology, Vol. 91, pp. 301-307, 1969.   DOI
10 P. Schatzberg, "Inhibition of Water-Accelerated Rolling- Contact Fatigue", Journal of Lubrication Technology, Vol. 93, pp. 231-233, 1971.   DOI
11 D. S. Sim, T. H. Heo, etc., "Estimation of the Overhaul Cycle Time for KTX Wheelset Bearing by RCF Test", Journal of the Korean Society of Safety, Vol. 31, No. 1, pp. 13-18, 2016.   DOI
12 V. M. M. B. da Mota, P. M. G. P. Moreira and L. A. A. Ferreira, "A Study on the Effects of Dented Surfaces on Rolling Contact Fatigue", International Journal of Fatigue, Vol. 30, pp. 1997-2008 , 2008.   DOI