New understanding of the role of coincidence site lattice boundaries in abnormal grain growth of aluminium alloy

作者：Park Chang Soo; Park Hyung Ki; Shim Hyung Seok; Na Tae Wook; Han Chan Hee; Hwang Nong Moon^*

来源：Philosophical Magazine Letters, 2015, 95(4): 220-228.

DOI：10.1080/09500839.2015.1033027

• microstructure analysis
• aluminum alloys
• abnormal grain growth
• EBSD
• boundary migration
• coincidence site lattice

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 sigma 9 boundaries was noticeably low, which is contrary to the previous suggestions.

• 出版日期2015-4-3