Investigation on Post-Deformation Recrystallization Behavior of 22MnB5 Steel based on Stress Relaxation

Abstract With the aim of analyzing post-deformation Recrystallization (PDRX) 22MnB5 steel and grain size evolution after hot forming sheet using BAEHR 805 A/D thermo-mechanical simulator, several isothermal stress relaxation tests were performed in a temperature range 800 to 950 °C, predeformation 0.4 0.8 strain rate 0.01 s −1 . As result deformation, PDRX kinetics can be described based on an Avrami equation as function temperature, degree rate. increases, recrystallization accelerates. The also has positive influence fast PDRX. Predeformation opposite effect, consumption stored energy occurred process tests. Furthermore, microstructure is parameters. investigation showed that corresponds calculations. EBSD analysis helped analyze effects certain conditions martensite morphology. results indicate lower higher lead fine packages. In contrast, block width increases when applying rates.