Analysis for plastic flow characteristic under uniaxial cyclic loading at room and high temperature of 316L stainless steel

Based on the experimental results of 316L stainless steel subjected to uniaxial strain and stress cycling at room and high temperature, the properties of plastic flow of material were quantitatively analyzed. The effects of cyclic strain amplitude, mean strain, temperature and their histories on the evolution rule of plastic modulus under strain cycling are investigated. And, the influences of stress amplitude, mean stress, temperature and their histories on the evolution rule of plastic modulus under stress cycling are also analyzed. The discussion is focused on the relation of ratcheting to the plastic modulus and accumulated plastic strain. It is shown that the properties of plastic flow of strain cycling are apparently different with that of asymmetrical stress cycling, the ratcheting of asymmetrical stress cycling at room and high temperature is decided by the evolution of plastic modulus and accumulated plastic strain