Abstract
Using the strain-anneal method, many iron single crystals were produced from pure iron sheets rolled by various reduction, then their crystallographic orientations were determined. The results obtained are as follows:- The lengthwise direction of single crystals, produced from iron sheet of 77% cold-rolling reduction, 0.4 mm in thickness, is near [001] or in a middle part of the stereographic triangle, and their normal direction of the top surfaces is near [211] or [110]. The lengthwise direction of single crystals produced from iron sheet of 89% cold-rolling reduction, 0.2 mm in thickness, is near [011], and their normal direction of the top surfaces is near [110] or [211]. The lengthwise direction of single crystals produced from iron sheet of 94% cold-rolling reduction, 0.1 mm in thickness, is near [011], [\bar111] or in the middle part of that, and their normal direction of the top surfaces is near [110], or [211]. The preferred orientation of single crystal plates obtained from a iron sheet rolled by 75% to 0.1 mm in thickness after intermediate annealing at 900°C for 6 hours is similar to that of a plate obtained from iron sheet rolled by 77% to 0.4 mm in thickness. Moreover, the orientation of single crystals is changed by the direction of cutting off from the sheet. From these results, it is clear that the orientation of single crystal plates of iron are changed by the initial rolling reduction and the cutting direction for the same pre-annealing.
