화학공학소재연구정보센터
Materials Science Forum, Vol.426-4, 3697-3702, 2003
Influence of repeating of partial annealing and light rolling process on cube texture in high purity aluminum
To obtain strong cube texture in aluminum, the Pechiney process in which partial annealing and light rolling are inserted before final annealing is effective. In addition to one cycle partial annealing and light rolling, one or two cycles lead to the formation of stronger cube texture in AA3004 alloy. In this study, the effect of three-cycle process was investigated in high purity aluminum foil for electrolytic capacitor by X-ray diffraction and optical microscopy. To detect cube texture, transmission Laue method was used. As the cycles of partial annealing and light rolling increases, the formation of recrystallized grains with R-orientation was suppressed and sharpness of cube texture was intensified. By three-cycle process, sharp cube texture with orientational spread around RD was obtained. Orientational. spread around RD was not uniform in the specimen but have gradient along transverse direction, being most pronounced at the specimen edges. This suggests that cube-oriented grains formed during partial annealing rotate during light rolling and preferentially grow by final annealing. Strong cube texture formation was ascribed to the ease of recovery in rolled cube orientation and to reluctance of recrystallization in deformation structure in which rolling texture was retained during partial annealing.