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- Title
Atomic scale HAADF-STEM study of η′ and η phases in peak-aged Al-Zn-Mg alloys.
- Authors
Bendo, Artenis; Matsuda, Kenji; Lee, Seungwon; Nishimura, Katsuhiko; Nunomura, Norio; Toda, Hiroyuki; Yamaguchi, Masatake; Tsuru, Tomohito; Hirayama, Kyosuke; Shimizu, Kazuyuki; Gao, Hongye; Ebihara, Kenichi; Itakura, Mitsuhiro; Yoshida, Tomoo; Murakami, Satoshi
- Abstract
The microstructures of precipitates in Al-Zn-Mg alloys in peak-aged condition have been studied using scanning transmission electron microscope. The same thermo-mechanical treatment was applied in all alloys. Investigation of peak-aged samples revealed that the most commonly found phases were η′ and η with their respective habit planes on {111} and {100}. η′ phases under [110] were analyzed and compared with η′ structure models. Furthermore, a close inspection of η phase as the second most found precipitate revealed that it incorporates an anti-phase resembling boundary, not observed in other orientation relationships that precipitates create with Al matrix, in addition, differences in matrix-precipitate interfaces between η′/ η and η phases were noticed. This paper addresses the first part to the analysis of η′ phase. Next part is extended to the analysis of the η phase.
- Subjects
ALUMINUM-zinc alloys; METAL microstructure; PHASE transitions; SCANNING transmission electron microscopy; PRECIPITATION (Chemistry)
- Publication
Journal of Materials Science, 2018, Vol 53, Issue 6, p4598
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-017-1873-0