Abstract

BYRNE, Jim; CLAUDIO, Ricardo A.  and  BURGESS, Andrew. Resisting metal fatigue in aeroengines, surface damage and surface treatments. C.Tecn. Mat. [online]. 2008, vol.20, n.1-2, pp.30-39. ISSN 0870-8312.

The potential failure modes of components in aero engines are considered, with particular emphasis on fatigue, including high cycle fatigue (HCF), low cycle fatigue (LCF) and combined HCF/LCF. Some results of recent studies at Portsmouth of the influence of foreign object damage (FOD) on the fatigue behaviour under these different conditions of a fan and compressor material, Ti6Al4V alloy, are presented. A two parameter crack propagation model is considered. The benefits in resisting fatigue through surface modification by the traditional process of shot peening has become well established for components such as turbine and compressor discs. The beneficial results of shot peening on the fatigue resistance of an advance nickel base superalloy at elevated temperature are presented together with the effects of subsequent surface scratch damage.

Keywords : High Cycle Fatigue; Low Cycle Fatigue; Foreign Object Damage; Shot Peening.

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