Mechanical properties of pre-strained austenitic stainless steel from the view of energy density

The effect of pre-strain on mechanical properties was investigated for 316L austenitic stainless steel over pre-strain value ranging from 0% to 35%. The effect of pre-strain on energy density of tensile curve was focused, and pre-strain enhances elastic energy density while reduces fracture energy density. Moreover, an energy dissipation variable was proposed based on fracture energy density as a damage parameter of pre-strained material. The relationships between energy dissipation variable and tensile mechanical properties were discussed. Finally, based on energy dissipation variable, an improved Hollomon model considering pre-strain damage is developed to predict mechanical properties of pre-strained 316L austenitic stainless steel.