Microstructural evolution during accumulative roll-bonding of commercial purity aluminum

作者：Huang X^*; Tsuji N; Hansen N; Minamino Y

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2003, 340(1-2): 265-271.

DOI：10.1016/S0921-5093(02)00182-X

• accumulative roll-bonding
• cold rolling
• microstructure
• misorientation
• spacing
• aluminum

The microstructure in commercial purity aluminum deformed from medium to high strain (epsilon(vM) = 1.6-6.4) by accumulative roll-bonding (ARB) at 473 K was quantitatively examined by transmission electron microscopy. It was found that a sub-micrometer lamellar structure characterizes the microstructure at high strains (epsilon(vM) > 1.6), and that the lamellar boundary spacing decreases and the misorientation across the lamellar boundaries increases with increasing rolling strain. This characteristic evolution has also been observed during conventional cold-rolling of commercial purity aluminum. However, a comparison between the two processes shows a significant difference in the evolution of the microstructural parameters. These differences are discussed based on the different processing conditions characterizing ARB and conventional rolling, respectively.

• 出版日期2003-1-15