Rolling and Recrystallization Textures in 2-nine, 3-nine, 4-nine and 5-nine Al

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  • いろいろな純度のAlの圧延および再結晶集合組織
  • イロイロナ ジュンド ノ Al ノ アツエン オヨビ サイケッショウ シュウゴウ ソシキ

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Abstract

The rolling and recrystallization textures were investigated in 2-nine, 3-nine, 4-nine and 5-nine Al. It was found that the recrystallization texture of Al varies with purity. The origin of different recrystallization texture is explained by the oriented growth theory and the inverse Rowland transformation. Although there are some criticisms for these theories, the oriented growth theory seems to be able to fully explain our results. In low purity Al, impurity atoms prevent the grain boundary migration during recystallization, so that the rolling texture is preserved until the recrystallization is completed. In high purity Al, it is considered that the (100)[001] recrystallization texture is formed by the selective growth and smooth grain boundary migration. The inverse Rowland transformation is also a possible mechanism, if the stacking fault energy in high purity Al is assumed to be about 100 ergs/cm2.

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