Abnormal Growth of Goss Grains in Grain-oriented Electrical Steels

Abstract

Abstract:

With the help of electron back scattering diffraction techniques and field emission microscope, the misorientation 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°C 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.

Key words: Recrystallization, Precipitates, Goss grain, Abnormal grain growth, Grain-oriented electrical steel

Wei Guo Weimin Mao. Abnormal Growth of Goss Grains in Grain-oriented Electrical Steels[J]. J Mater Sci Technol, 2010, 26(8): 759-762.

References

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