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Thermal-mechanical fatigue behaviour of a titanium matrix composite reinforced with long SiC fibers

Abstract : This study investigates the thermal-mechanical fatigue (TMF) behaviour of a titanium matrix composite, SCS6/Ti-6242 aimed to be used in future jet engines by Snecma. The TMF tests conditions under stress control are chosen to simulate the actual loading of the composite part in a compressor disc during engine operation. Observations of fracture surfaces are consistent with a failure controlled by fibre fracture and matrix micro-cracks. A finite element model is made to estimate the stress in the various components based on the Transformation Analysis Model of Dvorak. A complex redistribution occurs under thermal mechanical cycle due to viscoplasticity of Ti-6242 matrix. This is a major input for damage models to predict lifetime under these complex loading conditions.
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  • HAL Id : hal-00425098, version 1

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Faten Bourbita, Luc Rémy, Alain Köster. Thermal-mechanical fatigue behaviour of a titanium matrix composite reinforced with long SiC fibers. 17th international conference on composite materials, Jul 2009, Edinburgh, United Kingdom. 10 p. ⟨hal-00425098⟩

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