1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 2. Technology Center, Anyang Iron and Steel Group Company, Anyang 455004, Henan, China 3. Metallurgy Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China
Effect of Thermomechanical Parameters on ��3n Grain Boundaries and Grain Boundary Networks of a New Superaustenitic Stainless Steel
1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 2. Technology Center, Anyang Iron and Steel Group Company, Anyang 455004, Henan, China 3. Metallurgy Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China
ժҪ A Hot compression tests were conducted in a temperature range of 800-1100 �� and strain rate range of 0��1-10 s-1 using a Gleeble 3500 thermomechanical 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 ��3n (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 ��3n (n=1, 2, 3) twin grain boundaries, some ��1 boundaries 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.
Abstract��A Hot compression tests were conducted in a temperature range of 800-1100 �� and strain rate range of 0��1-10 s-1 using a Gleeble 3500 thermomechanical 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 ��3n (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 ��3n (n=1, 2, 3) twin grain boundaries, some ��1 boundaries 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.
Hong-ying SUN,,Zhang-jian ZHOU,Man WANG,Xiao LI. Effect of Thermomechanical Parameters on ��3n Grain Boundaries and Grain Boundary Networks of a New Superaustenitic Stainless Steel[J]. �й������ڿ���, 2014, 21(1): 109-115.
Hong-ying SUN,,Zhang-jian ZHOU,Man WANG,Xiao LI. Effect of Thermomechanical Parameters on ��3n Grain Boundaries and Grain Boundary Networks of a New Superaustenitic Stainless Steel. Chinese Journal of Iron and Steel, 2014, 21(1): 109-115.
2014, Vol. 21 
