New understanding of the role of coincidence site lattice boundaries in abnormal grain growth of aluminium alloy |
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| Authors: | Chang-Soo Park Hyung-Ki Park Hyung-Seok Shim Tae-Wook Na Chan-Hee Han |
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| Affiliation: | 1. Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 151-742, Korea;2. POSCO Technical Research Laboratories, POSCO, Pohang 790-360, Korea |
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| Abstract: | The sequential microstructure evolution of abnormal grain growth (AGG) in the aluminium alloy (AA5052) was investigated to analyse the migration behaviour of coincidence site lattice (CSL) boundaries, which are known to play an important role in inducing AGG. The sequential evolution showed that CSL boundaries tend to disappear more slowly than general boundaries at the growth front of abnormally growing grains. Especially, the migration rate of Σ9 boundaries was noticeably low, which is contrary to the previous suggestions. |
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| Keywords: | abnormal grain growth coincidence site lattice aluminum alloys microstructure analysis boundary migration EBSD |
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