3%Si鋼の{110}<110>粗大粒冷間圧延板における再結晶挙動と再結晶集合組織の圧下率に伴う変化

抄録

We systematically investigated the change in crystal orientation due to recrystallization after processing using {110}<110> single crystals as the initial orientation in the reduction range between 10–70%. The changes may be classified into two reduction cases: First, in the 10–40% reduction rate, at 10% strain, the {110}<110> grains recrystallized and gradually transitioned toward {100}<001> with increasing reduction. In particular, at 40% reduction, recrystallization was initiated from the shear bands, resulting in a dominant orientation of {100}<001> after grain growth. The {100}<001> grains recrystallized and grew from the shear bands. At a 50–70% reduction rate, the primary recrystallized orientation became {111}<211>. At 50% reduction, the {111}<211> orientations were abundant as recrystallized grains near 40% recrystallization and the orientations increased during recrystallization and grain growth. This suggests that the {111}<211> orientations formed within the shear bands as the strain rates increased, driving recrystallization and grain growth. Although the {100}<001> orientation also existed within the shear bands, both the {111}<211> and {100}<001> orientations were recrystallized. During grain growth, the {111}<211> orientation likely consumed the {100}<001> orientation.