Monte Carlo study on abnormal growth of Goss grains in Fe-3%Si steel induced by second-phase particles
来源期刊：International Journal of Minerals Metallurgy and Materials2016年第12期
论文作者：Dong-qun Xin Cheng-xu He Hao Wang Peng-fei Hou Wen-kang Zhang
文章页码：1397 - 1403
摘 要：The selective abnormal growth of Goss grains in magnetic sheets of Fe-3%Si（grade Hi-B） induced by second-phase particles（AlN and MnS） was studied using a modified Monte Carlo Potts model. The starting microstructures for the simulations were generated from electron backscatter diffraction（EBSD） orientation imaging maps of recrystallized samples. In the simulation, second-phase particles were assumed to be randomly distributed in the initial microstructures and the Zener drag effect of particles on Goss grain boundaries was assumed to be selectively invalid because of the unique properties of Goss grain boundaries. The simulation results suggest that normal growth of the matrix grains stagnates because of the pinning effect of particles on their boundaries. During the onset of abnormal grain growth, some Goss grains with concave boundaries in the initial microstructure grow fast abnormally and other Goss grains with convex boundaries shrink and eventually disappear.
Dong-qun Xin1，Cheng-xu He1，Hao Wang1，Peng-fei Hou5，Wen-kang Zhang5
1. School of Materials Science and Engineering, University of Science and Technology Beijing5. Technical Center, Taiyuan Iron and Steel (Group) Co., Ltd.
摘 要：The selective abnormal growth of Goss grains in magnetic sheets of Fe-3%Si（grade Hi-B） induced by second-phase particles（AlN and MnS） was studied using a modified Monte Carlo Potts model. The starting microstructures for the simulations were generated from electron backscatter diffraction（EBSD） orientation imaging maps of recrystallized samples. In the simulation, second-phase particles were assumed to be randomly distributed in the initial microstructures and the Zener drag effect of particles on Goss grain boundaries was assumed to be selectively invalid because of the unique properties of Goss grain boundaries. The simulation results suggest that normal growth of the matrix grains stagnates because of the pinning effect of particles on their boundaries. During the onset of abnormal grain growth, some Goss grains with concave boundaries in the initial microstructure grow fast abnormally and other Goss grains with convex boundaries shrink and eventually disappear.
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