Aircraft Bearings Fracture Failure Analysis

Abstract:

Between aircraft bearings lugs, plates fracture appeared. The failure mode and cause were analyzed by macro and micro observation, EDS analysis, metallographic examination and hardness testing. The results showed that two bearings’ failure were stress corrosion cracking. Bearings’ failure were related with abnormal force state, material cast loose exceeding the allowed limited values played a catalytic role to crack propagation. It is suggested that bearings material surface protection should be strengthened to improve corrosion resistance, bearings design should be optimized to avoid abnormal tensile stress, and material casting process should be improved to reduce cast loose.

• Periodical: Advanced Materials Research (Volumes 887-888)
• Pages: 319-323
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.887-888.319
• Online since: February 2014
• Authors: Huan Ping Kong*, Chang Kui Liu, De Lin Liu, Tao Jiang
• Keywords: Bearing, Cast Loose, Stress Corrosion Cracking (SCC), Surface Protection

References

[1] J. Zhang, M.C. Wang, Y.C. Zhai, et al. Corrosion science and protection technology Vol. 21(2009), p.593.

[2] L.C. Huang, H.C. Liu, A. Gu, et al. Acta aeronautica et eronautica et astronautica sinica Vol. 30(2009), p.1144.

[3] A.H. Du, J.M. Long, H.Z. Pei. Journal of Chinese society for corrosion and protection Vol. 28(2008), p.251.

[4] R.G. Song, W. Dietzel. Acta Mater. Vol. 52(2004), pp.4727-4743.

[5] M.J. Starink, S.C. Wang. Acta Mater. Vol. 51(2003), pp.5131-5150.

[6] Z.Y. Xu, C. Zheng, N. Dong. Failure analysis and prevention, Vol. 5(2010), pp.106-109.

[7] D. Zhang, P.D. Zhong, C.H. Tao, et al: Failure analysis and prevention, (National defence industry press, China, 2008).

[8] Z.W. Liu, Y. Li, N. Wang. Light alloy fabrication technology Vol. 41(2013), p.18.

[9] M.J. Lessiter. Modern casting Vol. 7(1992), p.47.

[10] Q. Wang, L.M. Wang, W.X. Han, et al. The Chinese Journal of nonferrous metals Vol. 11(2011), pp.226-229.