Abnormal Growth of Goss Grains in Grain-oriented Electrical Steels  

作　　者：Wei Guo Weimin Mao 

机构地区：[1]Department of Materials, University of Science and Technology Beijing, Beijing 100083, China [2]State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Journal of Materials Science & Technology》2010年第8期759-762,共4页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.50871015)

摘　　要：With the help of electron back scattering diffraction techniques and field emission microscope, the misorienta- tion and the precipitation environment of Goss grains in conventional grain-oriented steel were observed and investigated at the initial stage of secondary recrystallization. It reveals that the abnormal Goss grains have a high fraction of high angle boundaries ranging from 25 to 40 deg. The most important observation is that some of {110}〈001〉 grains in matrix indicated higher particle density than their neighbor grains during final annealing at 875℃ before secondary recrystallization, which could create a favorable environment for their abnormal grain growth. Based on misorientation and precipitation results, the abnormal growth mechanism of Goss grains was sketched.With the help of electron back scattering diffraction techniques and field emission microscope, the misorienta- tion and the precipitation environment of Goss grains in conventional grain-oriented steel were observed and investigated at the initial stage of secondary recrystallization. It reveals that the abnormal Goss grains have a high fraction of high angle boundaries ranging from 25 to 40 deg. The most important observation is that some of {110}〈001〉 grains in matrix indicated higher particle density than their neighbor grains during final annealing at 875℃ before secondary recrystallization, which could create a favorable environment for their abnormal grain growth. Based on misorientation and precipitation results, the abnormal growth mechanism of Goss grains was sketched.

关 键 词：RECRYSTALLIZATION PRECIPITATES Goss grain Abnormal grain growth Grain-oriented electrical steel 

分 类 号：TG142.77[一般工业技术—材料科学与工程] S511.01[金属学及工艺—金属材料]