ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Effects of Grain Boundary Characteristics on Secondary Recrystallization Textures in Fe–Si Alloy
Takashi KataokaHaruhiko AtsumiMasato YasudaNobusato MorishigeKenichi Murakami
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JOURNALS OPEN ACCESS Advance online publication

Article ID: ISIJINT-2020-437

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Abstract

To understand the factors that determine the secondary recrystallization textures of Fe–Si alloy, the change in the secondary recrystallization textures of Fe–Si sheets was investigated by increasing the cold-rolled reduction rate (CR) from 70 up to 95%.

The secondary recrystallization textures in the CRs=90–95% samples accumulated in specific orientations; the main components of the secondary recrystallization were {110}<001> in the CRs=90 and 93% samples, and {110}<001> with {110}<112> in the CR=95% sample. The experimental results were reproduced by calculations based on the idea that the secondary recrystallization texture is mainly determined by the frequency of the specific-orientation-grain-boundaries, for example, coincidence-site-lattice grain boundaries. In contrast, in the CR=70% sample, the secondary recrystallization texture was not accumulated but dispersed from {110}<001> to {110}<225> and was inaccurately reproduced by the above calculations.

The study concludes that the secondary recrystallization textures in the CRs=90–95% samples are mainly determined by the grain boundary effect. It is also concluded that the secondary recrystallization textures of the CR=70% sample are determined by both grain boundary effect and nucleus effect. The difference in the mechanisms originates from the changes in the frequency of the specific-orientation-grain-boundaries in the matrix and of the nuclei at the surface in the primary recrystallization textures of various CRs.

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© 2020 by The Iron and Steel Institute of Japan
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