Constitute and Corrosion Behaviors of Grain Boundary in Cold-rolled and Annealed Ferritic Stainless Steel
The microstructure,grain orientation texture and misorientation were investigated using EBSD and SEM technology in cold-rolled and annealed ferritic stainless steel.The results show that,when the cold-rolled specimens with the thickness reduction of 85% are annealed at 1000 ℃ for varying time from 30 min to 2 h,grain size has little change at the early stage.The average grain size increases significantly after 2 h annealing,which reaches 65 μm.In the meanwhile,strong{100}hkl grain texture occurs and resulted in a high frequency of low angle grain boundaries,which posses better intergranular corrosion resistance.