On Cyclic Deformation of 304 Stainless Steel under Strain-Controlled Nonproportionally Multiaxial Loading at High Temperatures

In order to accurately describe the strain-controlled cyclic deformation of material at high temperatures,an experimental research was carried out on the cyclic deformation of 304 stainless steel sub- jected to uni-axial and non-proportionally multi-axial cyclic straining at 350℃C and 700℃.The cyclic hard- ening behavior under different loading paths and different load conditions was studied.It is shown from the research that the non-proportionally multi-axial strain-controlled cyclic deformation of 304 stainless steel at high temperatures has distinct dependence on temperatures and loading paths.This result is useful to estab- lish constitutive model for the cyclic deformation of the material.