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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 6    December 2006

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Recrystallization behavior of high purity aluminum at 300 ℃
DU Yu-xuan(杜予晅), ZHANG Xin-ming(张新明), 
YE Ling-ying(叶凌英), LUO Zhi-hui(罗智辉)

School of Materials Science and Engineering, Central South University, 
Changsha 410083, China

Abstract: The recrystallization behavior of 98.5% cold rolled high purity aluminum foils annealed at 300 ℃ was investigated, and the evolution of the microstructures was followed by electron back scattered diffraction(EBSD). The results show that the recrystallization process of the high purity aluminum foils at 300 ℃ is a mixture of discontinuous- and continuous-recrystallization. The orientations of the recrystallization nuclei include not only the cube orientation, but also other orientations such as some near deformation texture components which are the results of strong recovery process. However, such continuously recrystallized grains are usually associated with relatively high free energy, so they would be consumed by the discontinuously-recrystallized grains (cube-oriented grains) in subsequent annealing. On the other hand, the pattern quality index of recrystallized grains shows dependence on the crystal orientation which might introduce some errors into evaluating volume fraction of recrystallization by integrating pattern quality index of EBSD.

 

Key words: high purity aluminum; pattern quality index; recrystallization; electron back scattered diffraction(EBSD); orientation

ISSN 1672-7029
CN 43-1423/U

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