Community Research and Development Information Service - CORDIS


The aim of this 52-month RTD programme, which focused principally on combustors, was to produce verified lifing methodology for the design and in-service support of all gas turbine components that are subjected to both creep and plasticity during every engine cycle. At its core was the development of three types of materials behaviour model and their implementation in the Finite Element (FE) programs used for component design:
- Deformation models to predict stabilised component stresses as efficiently as possible
- Crack initiation/damage models, based on parameters from the FE calculations, to predict component lives at the design stage
- Crack growth models to allow safe inspection intervals to be specified where in-service problems exist
Development of the models was based on thermomechanical fatigue (TMF) and isothermal test results on standard laboratory specimens and specimens containing representative component features. Their final verification used results from rig testing on sub-elements of combustor and turbine casing geometry under component loading conditions. Two materials were studied, C263 and Haynes 230. An overall matrix of 508 specimen tests was performed, 310 on C263 and 198 on H230. High quality data were produced for the two materials that allowed clear behavioural trends to be identified and represented in the materials modelling work. The large number of different test types and specimen designs allowed materials understanding to be built up step by step and transitioned from plain specimens through to components. This was facilitated by the development of novel techniques for TMF testing of featured specimens.

Download application/pdf (1025831)

Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top