Abstract
Experimental investigations of turbine blade materials under real operating conditions are very demanding. Therefore, the thermal and mechanical analysis should be carried out based on the finite element method. The purpose of the present analysis is to estimate the stress-strain condition of a turbine blade model by performing two sequential calculations: thermal analysis and structural mechanics analysis. In this study, two molybdenum-based alloys Mo–17.5Si–8B and Mo–9Si–8B are compared to the state-of-the-art nickel-based superalloy CMSX-4 as a blade material during turbine start-up and shut-down processes. The time-dependent thermo-mechanical stresses are taken into account, so that the influence of temperature gradient on stress-strain behavior of the blade could be represented.
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