论文部分内容阅读
Hot compression tests were conducted in a temperature range of 800-1 100℃and strain rate range of 0.1-10s-1 using a Gleeble 3500thermomechanical simulator to investigate the influence of hot deformation parameters(temperatures,strain rates and strains)on the grain boundary network evolution of a new grade Fe-Cr-Ni superaustenitic stainless steel.The results showed that a dominant effect of deformed temperature isΣ3n(n=0,1,2,3) boundaries population increased with decreasing temperature,while they first increased and then reduced with increasing strain and strain rate.Interestingly,besidesΣ3n(n=1,2,3)twin grain boundaries,someΣ1boundaries could interrupt grain boundaries network effectively,which enhance material performances.But they are scarcely reported.The misorientation of some segments LAGBs in the deformed microstructure(pancaked grains)increased and slid to high angle grain boundaries with increasing the fraction of recrystallized grains during hot deformation.
Hot compression tests were conducted in a temperature range of 800-1 100 ° C and strain rate range of 0.1-10s-1 using a Gleeble 3500thermomechanical simulator to investigate the influence of hot deformation parameters (temperatures, strain rates and strains) on the grain boundary network evolution of a new grade Fe-Cr-Ni superaustenitic stainless steel. The results showed that a dominant effect of deformed temperature is Σ3n (n = 0,1,2,3) boundaries population increased with decreasing temperature, while they first increased and then reduced with increasing strain and strain rate. Interestingly, besides Σ3n (n = 1,2,3) twin grain boundaries, someΣ1boundaries could interrupt grain boundaries network effectively, which enhance material performances.But they are scarcely reported. misorientation of some segments LAGBs in the deformed microstructure (pancaked grains) increased and slid to high angle grain boundaries with increasing the fraction of recrystallized grains during hot deformation.