The relationship between grain boundary character distribution and intergranular corrosion resistance of 304 austenitic stainless steel
A wedge-shaped 304 austenitic stainless steel with varied thickness longitudinally was cold rolled into a flat one and then annealed at 1323K for 10 min. The grain boundary character distributions (GBCDs) in the specimen as processed were examined by the means of Electron backscatter diffraction (EBSD). The results showed that, at the regions with low pre-strains ranged from 4％ to 6％, quite high fractions of Σ3n (n=0,1,2,3) grain boundaries and large-sized Σ3n (n=0,1,2,3) grain clusters are introduced compared with the regions of quite low ( less than 2.5％) or relatively high pre-strain. The surface appearance of after corrosion test reveals that grain dropping due to intergranular corrosion (IGC) is depressed and the penetration of IGC from the surface into the interior in the cross-section is arrested significantly as well in the regions with high fractions of Σ3n boundaries and large-sized Σ3n grain clusters.
grain boundary engineering Σ3n grain clusters intergranular corrosion 304 stainless steel
Fang Xiaoying Cui Xiao Qin Congxiang Wang Weiguo
School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
239-244
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）