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Inclination of Principal Residual Stress and the Direction of Cracking in Contact-Fatigued Ball Bearing Steel

Published online by Cambridge University Press:  06 March 2019

Kikuo Maeda ,
Noriyuki Tsushima ,
Masatoshi Tokuda  and
Hiroshi Muro
Kikuo Maeda
Affiliation:
NTN Toyo Bearing Co, Ltd., 511 Kuwana, Japan
Noriyuki Tsushima
Affiliation:
NTN Toyo Bearing Co, Ltd., 511 Kuwana, Japan
Masatoshi Tokuda
Affiliation:
NTN Toyo Bearing Co, Ltd., 511 Kuwana, Japan
Hiroshi Muro
Affiliation:
NTN Toyo Bearing Co, Ltd., 511 Kuwana, Japan
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Extract

Peeling is a surface fatigue failure of a roller bearing that consists of many shallow pits less than 10 pm in depth and cracks that link the pits. Peeling occurs rather easily on a smooth Surface when in contact with a rough surface under insufficient thickness of the lubricating oil film.

X-ray residual stress measurements on and under the contact surface after a peeling test revealed that the 2θ versus sin2ψ curve is not linear and that it curves depending upon the rolling contact condition and especially upon the existence of slip. Nonlinearity of the 2θ-sin2ψ) curve has been reported by Wakabayashi in a study of residual stress accompanying the grinding of soft steel and by Faninger in a study of residual stress due to rolling contact with annealed steel, but hot in the case of high hardness steel such as ball bearing steel. No complete explanation of this non-linearity has been made as yet.

Type
X-Ray Diffraction Stress (Strain) Determination
Information
Advances in X-Ray Analysis , Volume 23: Twenty-Eighth Annual Conference on Applications of X-ray Analysis, July 30 - August 3, 1979 , 1979 , pp. 341 - 348
Copyright
Copyright © International Centre for Diffraction Data 1979

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References

1. Wakabayashi, M., Nakayama, M., and Nagata, A., J. of the Japan Society of Precision Engineering, 43:661 (1977).Google Scholar
2. Faninger, G. and Walburger, H., Harterei-Technische Mitteilungen, 31, S 79 (1976).Google Scholar
3. Lode, W. and Peiter, A., ibid., 32, S 235 (1977).Google Scholar
4. Lode, W. and Peiter, A., ibid., 32, S 308 (1977).Google Scholar
5. Muro, H., Tsushima, T., and Nagafuchi, M., Wear, 35:261 (1975Google Scholar