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Crack growth in the creep-fatigue regime under constrained loading of thin sheet combustor alloys / M.R Bache, R.E Johnston, T.S Cook, B.J Robinson, J.F Matlik, Martin Bache, Richard Johnston
International Journal of Fatigue, Volume: 42, Pages: 82 - 87
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Crack growth in the creep-fatigue regime under constrained loading of thin sheet combustor alloys
|Published in:||International Journal of Fatigue|
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FAA legislation has recently classified aero-engine combustors as safety critical components, requiring damage tolerant lifing in preference to “safe-life” methodologies Novel, automated test methods are described for creep-fatigue crack propagation measurements under extreme temperature (approaching 1000oC), strain controlled conditions utilising thin sheet specimens. Unique data describing the evolution of constitutive behaviour and associated stress relaxation are presented, including evidence of continued crack propagation under significantly negative stress ratios. The potential commercial impact (life extensions) from this research are clearly demonstrated. Including collaboration from Derby, Bristol and RRC Indianapolis, this research acts as an exemplar of the global Rolls-Royce UTC model.(Advocate: Dr Mike Hicks, Head of Materials Engineering, Rolls-Royce plc; firstname.lastname@example.org)
College of Engineering