日本金属学会誌

J. Japan Inst. Metals, Vol. 16, No. 9 (1952),
pp. 492-495

Study on the Recrystallization Diagram of High Purity Aluminium (1st Report). Effect of purity

Yuzo Nakamura and Motoi Nishizaka


Abstract:

No systematic investigation of recrystallization diagram to have been carried out on the high purity aluminium. The authors seems investigated the recrystallization diagrams of the high purity aluminiums with a purities of 99.998, 99.992 and 99.92%, comparing with the commerical aluminium (99.5%) to determine the coarsining range. In the case of the initial sheet annealed at 550° which is usually adopted it was found that the coarsening phenomenon took place in the lower rolling reduction less than 5%, as expected in all pure aluminiums. On the other hand, in the case of the initial sheet annealed at 350° from the standpoint of practice, it was found that a remarkable coarsening took place only in 99.92% Al and its range seems to be limitted within the purities from 99.991 to 99.985%, And its coarsening did not take place in lower reduction less than 5% as expected, but it did in higher reduction such as 10∼45%. Another coarsening phenomenon was observed in 99.5% Al which had undergone a heavier reduction, of 45∼65%.


(Received 1952/5/27)

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