Prediction of the cyclic behavior of 316ln stainless steel at room temperature by a dislocation-based cyclic viscoplastic model

Abstract : A polycrystalline dislocation-based cyclic viscoplastic model is proposed to predict the cyclic behaviour of 316LN austenitic stainless steels at room temperature (RT). The evolution laws of the densities of different populations of dislocations are described, by taking into account the physical mechanisms of crystal viscoplasticity. The comparison between the predictions and corresponding experimental results shows that the cyclic behaviour of 316LN stainless steel is reasonably well described, particularly since a very reduced number of adjusted parameters is used and only tensile and relaxation curves are used in the adjustment procedure.