Simulation of Surface Treatment by Laser Shock Peening of Turbine Blades Based on INCONEL718

Our work is devoted to the numerical modeling by the finite element method of the laser shock process. This model is an explicit dynamic model using Johnson Cook’s law of behavior, which allows taking into account the effect of the strain rate, the effect of isotropic work hardening. It allows the prediction of: (i) residual stresses, (ii) equivalent plastic strain in the sense of Von Mises and (iii) damage introduced in the surface layers. This model was applied to the nickel-based aerospace Super-alloy INCONEL718. A simulation model has been established to depict a sample that accurately represents a turbine blade. This three-dimensional model will be utilized to forecast two key aspects. Firstly, it will predict the impact of a preventive treatment on the leading edges of a turbine blade. Secondly, it will serve as a validation example in a subsequent study to investigate the influence of laser shock on the fatigue life of treated components.