Dynamic Recrystallization Behavior and Microstructure Evolution of AISI 304N Stainless Steel

Dynamic recrystallization of 304N stainless steel was investigated at deformation temperatures of 900–1300 °C and strain rates of 0.01–10 s−1 by a Gleeble-1500 thermo-mechanical simulator. And the microstructure evolutions of specimens with different deformation temperatures were observed by using a transmission electron microscope. Results indicated that compared with conventional AISI 304 austenitic stainless steel, 304N stainless steel has higher deformation resistance force and deformation activation energy under similar conditions. In addition, the flow stress constitutive equation of 304 N stainless steel was obtained by regression analysis of experimental stress-strain data, and the calculated values proposed by the mathematical model agree well with the experimental results.