Abstract: The influence of different annealing processes on the recrystallization and grain growth behaviors of low voltage electron aluminum foil was investigated using the quantitative texture analysis, EBSD micro orientation analysis, as well as grain size measurement. The corresponding processes were also discussed based on the current recrystallization theory. A recovery process before primary recrystallization will reduce the storage energy as well as the recrystallization driving force drastically, and therefore influence the recrystallization grain size and volume fraction of cube texture systematically. An abnormal grain growth process, connected with strong cube texture in electron aluminum foil, could be induced by certain special annealing treatment, which will decrease the volume fraction of cube texture obviously.
Recrystallization and grain growth during annealing of cold rolled low voltage electronic aluminum foil
Abstract：
The influence of different annealing processes on the recrystallization and grain growth behaviors of low voltage electron aluminum foil was investigated using the quantitative texture analysis, EBSD micro orientation analysis, as well as grain size measurement. The corresponding processes were also discussed based on the current recrystallization theory. A recovery process before primary recrystallization will reduce the storage energy as well as the recrystallization driving force drastically, and therefore influence the recrystallization grain size and volume fraction of cube texture systematically. An abnormal grain growth process, connected with strong cube texture in electron aluminum foil, could be induced by certain special annealing treatment, which will decrease the volume fraction of cube texture obviously.
Fig.1 Texture after annealing at 200 ℃ for 1 h ({111} pole figures)
图2 不同退火温度退火处理后的织构 ({111}极图)
Fig.2 Textures at different annealing temperature ({111} pole figures) (a) —300 ℃ for 30 min; (b) —350 ℃ for 30 min; (c) —400 ℃ for 30 min; (d) —450 ℃ for 30 min
图3 预处理后不同退火温度退火处理的织构 ({111}极图)
Fig.3 Textures at different annealing temperature after pre-treatment ({111} pole figures) (a) —300 ℃ for 30 min after 200 ℃ for 1 h; (b) —350 ℃ for 30 min after 200 ℃ for 1 h; (c) —400 ℃ for 30 min after 200 ℃ for 1 h; (d) —450 ℃ for 30 min after 200 ℃ for 1 h
Fig.4 Average grain size and corresponding volume fraction of cube texture (a) —Average grain size; (b) —Volume fraction of cube texture
图5 退火组织
Fig.5 Annealing structures (a) —300 ℃ for 30 min; (b) —300 ℃ for 30 min after 200 ℃ for 1 h
图6 退火箔EBSD分析
Fig.6 EBSD analysis of annealed foils (a) —350 ℃, 30 min; (b) —Orientation character in (a) (gray color means cube orientation) ; (c) —350 ℃ for 30 min after 200 ℃ for 1 h; (d) —Orientation character in (c) (gray color means cube orientation)
