Development of thin disc testing to characterize the mechanical behaviour of the CC wall material

Kurzfassung

The wall of the combustion chamber (CC), which is a critical launch vehicle component, is subjected to a great gradient of temperature through its whole thickness and to environment effects like oxygen blanching and hydrogen embrittlement. In order to be close to service conditions (i.e. thin wall) and to consider environment effects on the material, SUPMECA has developed tests using thin discs; there tests are used instead of usual monotonic tensile tests. Experimental results of disc testing allow determining mechanical properties of the material. Indeed, with assumptions, a calculation method has been developed to determine the mechanical properties of the material from experimental data; this calculation method has been validated with various metallic materials.