By using Prof. T. Fujiwara's method, we have succeeded in producing the aluminium single crystal foils (0.06×5×100 mm 3 , 99.53% in purity) having their definite crystallographic orientations; for example, they are orientated in [110]–(110) or [110]–(100) or D s or D d , etc. It was found that the easiness with which a single crystal foil was produced was remarkably different according to its crystallographic orientation. For the specimens D s and D d , it was also found that the bending behaviors caused by some mechanical shock were different from each other.
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Fujiwara et al. (1955) studied this question.