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《矿物冶金与材料学报(英文版)》 2018-08
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Effects of initial grain size and strain on grain boundary engineering of high-nitrogen CrMn austenitic stainless steel

Zhen-hua Wang;Jian-jun Qi;Wan-tang Fu;School of Mechanical Engineering,Yanshan University;State Key Laboratory of Metastable Materials Science and Technology,Yanshan University;HBIS Group Technology Research Institute;  
18 Mn18 Cr0.5 N steel with an initial grain size of 28–177 μm was processed by 2.5%–20% cold rolling and annealing at 1000°C for 24 h,and the grain boundary character distribution was examined via electron backscatter diffraction.Low strain(2.5%) favored the formation of low-Σ boundaries.At this strain,the fraction of low-Σ boundaries was insensitive to the initial grain size.However,specimens with fine initial grains showed decreasing grain size after grain boundary engineering processing.The fraction of low-Σ boundaries and the(Σ9 + Σ27)/Σ3 value decreased with increasing strain; furthermore,the specimens with fine initial grain size were sensitive to the strain.Finally,the effects of the initial grain size and strain on the grain boundary engineering were discussed in detail.
【Fund】: financially supported by the National Natural Science Foundation of China (No.51505416);; the Natural Science Foundation—Steel and Iron Foundation of Hebei Province China (No.E2017203041);; the Natural Science Foundation of Hebei Province China (No.E2016203436);; the Post-Doctoral Research Project of Hebei Province China (No.B2016003029)
【CateGory Index】: TG142.71
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