Papers by Keyword: Secondary Recrystallization

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Authors: Atsuto Okamoto, H. Yashiki
555
Authors: C.H. Wörner, Peter M. Hazzledine
379
Authors: Yasuyuki Hayakawa, M. Kurosawa, Michiro Komatsubara
1305
Authors: Shigeru Suzuki, Shigeto Takebayashi, Yoshiyuki Ushigami
Abstract: The microstructure of Fe-3 mass% Si alloys before secondary recrystallization has been characterized by analyzing precipitates and grain boundary segregated elements. The samples used were mainly sheets of Fe-3%Si alloys containing manganese, sulfur, aluminum, nitrogen and tin, which were decarburized and annealed up to secondary recrystallization. Grain boundary segregation in primarily recrystallized samples was studied using Auger electron spectroscopy (AES), and precipitates were analyzed using transmission electron microscopy (TEM) with an energy dispersive X-ray spectrometer (EDX). AES spectra showed that tin and nitrogen were enriched on grain boundaries in the Fe-3 mass% Si alloys. TEM/EDX analysis showed that the morphology and distribution of the fine precipitates such as manganese sulfide and aluminum nitride were influenced by addition of tin. The characteristic structure formed by secondary recrystallization of grain oriented silicon steel is considered to be influenced by the fine precipitates and segregation of a small amount of elements, as the abnormal motion of grain boundaries of the silicon steel was correlated with the precipitation and segregation of the alloying elements.
811
Authors: Shuichi Nakamura, Y. Ushigami, S. Takebayashi, Shinya Suzuki
1293
Authors: Tadachika Nakayama, Y. Ushigami, T. Nagashima, Yozo Suga, N. Takahashi
611
Authors: Jong Tae Park, Hyung Don Joo, Dae Hyun Song, Kyung Jun Ko, No Jin Park
Abstract: Desirable magnetic properties for grain oriented electrical steels are low core loss and high magnetic flux density. These properties are closely related with sharpness of {110} texture. This Goss texture develops by abnormal grain growth during secondary recrystallization annealing. Based on experimental results, a general suggestion which estimates the magnetic properties after completion of secondary recrystallization from a primary recrystallized texture can be proposed. For a material to have better magnetic properties after completion of secondary recrystallization, it should have a primary recrystallized texture in which there are not only large number of ideal Goss grains, but also lower frequency of low angle grain boundary around those Goss grains.
726
Authors: Y. Ushigami, Kenji Kawasaki, Tadachika Nakayama, Yozo Suga, J. Harase
1081
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