Materials Transactions, JIM
Online ISSN : 2432-471X
Print ISSN : 0916-1821
ISSN-L : 0916-1821
Microstructure and Texture of Commercial Purity Aluminum Strips Produced by Melt Direct Rolling
Nobuhiro TsujiYuichi NagaiTetsuo SakaiYoshihiro Saito
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1998 Volume 39 Issue 2 Pages 252-261

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Abstract

The microstructure and texture of the aluminum strips produced by the melt direct rolling (MDR) method are inhomogeneous in the direction of strip thickness. The subsurface layer (about 30% thickness of the strips) shows fine and equiaxed grains formed by geometric dynamic recrystallization and has a strong shear texture (⟨110⟩//RD fiber texture including {111}⟨110⟩ and {001}⟨110⟩ orientations), while the center layer shows elongated grains and has a typical rolling texture. This inhomogeneity is due to large shear deformation induced by friction during rolling. Near the surface, the microstructure shows no remarkable changes during annealing below 673 K, but the relative intensities of {111}⟨110⟩ and {113}⟨110⟩ orientations increase. Relatively large \barr and very large Δr are obtained from the tensile tests of the MDR strip and they vary with the textures depending on annealing temperatures. The present study has clarified that the MDR method is useful to develop the {111} texture in aluminum strip by introduction of large shear deformation during rolling.

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© The Japan Institute of Metals
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