Influence of Initial Crystal Orientation and Carbon Content on Rolling-induced Texture in 3 Mass% Si Steel

• Published in: ISIJ International 2022/11/15, Vol.62(11), pp.2382-2388
• Main Authors: Shingaki, Yukihiro, Takashima, Minoru, Hayakawa, Yasuyuki
• Format: Article
• Language: English
• Subjects: carbon; crystal orientation; grain oriented electrical steel; rolling-induced texture
• ISSN: 0915-1559; 1347-5460
• DOI: 10.2355/isijinternational.ISIJINT-2022-194

The influence of the initial crystal orientation and carbon content on rolling-induced texture was investigated using quasi-single crystals of 3.2 mass% Si steel. These specimens had {110} and {110} crystal orientations, which are common near surface textures for hot-rolled steel band. In the case of ultralow-carbon specimens, the initial {110} orientation rotated to {111} after 66% reduction cold rolling and the initial {110} orientation rotated to near {211} . It is considered that the crystal rotation from {110} to near {211} is caused by activation of the {110} slip system, which has the second largest Schmid factor. The {211} orientation is not considered to be a stable rolling-induced texture; however, the {211} orientation was well developed in the present experiments. In addition, the {211} orientation has a geometric characteristic that if it rotates by activation of one slip system, it will revert to the initial {211} crystal orientation by activation of another slip system. In the case of specimens containing carbon, the {110} orientation rotated to {111} and {100} due to deformation twinning. On the other hand, the {110} orientation rotated from the {211} orientation to the {111} orientation during cold rolling. Deformation twinning was also observed. It is considered that the crystal orientation of the deformation twins rotated to near {111} by activation of the {110} slip system.