Characterization and Modeling of the Ratcheting Behavior of the Ferritic-Martensitic Steel P91

In this work, the ratcheting-behavior of 9%%Cr-1%%Mo ferritic–martensitic steel is studied with uniaxial cyclic loading. To describe the ratcheting-behavior of this steel, a visco-plastic constitutive model with consideration of cyclic softening of Reduced Activation Ferritic Martensitic steels is further modified, based on the analysis of back stress.