Abstract
A sigle crystal of high purity aluminium was made by means of soft mold method, which was rolled on the (110) plane and in the [112] direction. After rolling, surface layers and edges were electrolytically etched off and side of the specimen was scrubbed with emery paper to produce random artificial nucleation. Then the specimen was annealed at 350°C for 600sec. A large number of grains were formed on the scrubbed side and some of these grew across the thickness of the specimen. Orientations of grain were checked by X-ray and microscope on the scrubbed side and also on the unscrubbed side. It was observed that grains on the scrubbed side had rather equiaxial shape and random orientations. On the unscrubbed side, however, grains had elongated shape in two directions. These two directions were related to the matrix by a rotation around ‹111› axes. The fact that four of eight equivalent ‹111› rotational relationships were predominant in the grain growth, suggests that the deformed single crystal matrix is not fully symmetrical for the growth rates of recrystallized grains as in the crystallo graphic meaning. It is suggested that the growth rates of recrystallized grains would be affected by the mechanism of deformation of matrix.
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