Creep Behavior of SUS 304 after Cyclic Plasticity

In the last decade, research on the constitutive formulation for cyclic plasticity or cyclic viscoplasticity has been developed so extensively that many models have been proposed in the literatures. Recently, ratchetting has attracted the interest of researchers[1–3]. Chaboche and Nouailhas[1] pointed out that the description of ratchetting in term of constitutive equations is mainly related to the kinematic hardening, and that the constitutive formulations which are presently available either underestimate or overestimate the ratchetting effect. Similarly, Buggles and Krempl[2] showed that under the selected test conditions at room temperature ratchetting of SUS304 stainless steel is viscous in nature, and suggested that predictions of ratchetting could be improved with the help of a viscoplasticity theory.