Abstract
The initial stage of secondary recrystallization of Fe–3% Si steel was investigated using a transmission electron microscope with a focus on the existence of sub-boundaries in abnormally growing Goss grains. Ten randomly chosen abnormally growing Goss grains were observed to have sub-boundaries consisting of aligned edge dislocations. In contrast, no sub-boundaries were observed in the matrix grains. The misorientation angles of the observed sub-boundaries were in the range 0.1–0.5°, which was estimated based on the spacing between the dislocations.
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