Deformation analysis for thermal shock using optical sensors and constitutive modelling

Abstract Thermal shock is an extreme form of thermo-mechanical loading with high spatial and time-dependent gradients and affects life expectancy of high quality and safety relevant machine components. This paper concentrates on experimental and numerical investigations of cyclic deformations under thermal shock loading. For this purpose two different specimens, a cylinder and a hybrid-forming tool, of hot-working steel (X37CrMoV5-1) are heated up by induction heating and shocked down by sprayed water in a cyclic manner. After a certain number of thermal shock cycles the specimens are analysed with optical measuring equipment to investigate deformations and form changes. The progression of deformation development is observed with respect to the number of thermal shock cycles and the results of the deformation analysis are used for validation of a finite element simulation with a constitutive material model. Keywords: thermal shockoptical sensorsdeformation analysisconstitutive modelling Acknowledgements This paper is based on investigations of the collaborative research centre SFB/TR TRR 30, which is kindly supported by the Deutsche Forschungsgemeinschaft (DFG), Germany.