An unreported precipitate orientation relationship in Al-Zn-Mg based alloys

被引：33

作者：

Bendo, Artenis ^{[1
]}

Matsuda, Kenji ^{[1
]}

Lervik, Adrian ^{[2
]}

Tsuru, Tomohito ^{[3
]}

Nishimura, Katsuhiko ^{[1
]}

Nunomura, Norio ^{[1
]}

Holmestad, Randi ^{[2
]}

Marioara, Calin D. ^{[4
]}

Shimizu, Kazuyuki ^{[5
]}

Toda, Hiroyuki ^{[5
]}

Yamaguchi, Masatake ^{[3
]}

机构：

[1] Univ Toyama, Grad Sch Sci & Engn, 3190 Gofuku, Toyama 9308555, Japan

[2] Norwegian Univ Sci & Technol NTNU, Dept Phys, N-7491 Trondheim, Norway

[3] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan

[4] SINTEF Ind, Mat & Nanotechnol, N-7965 Trondheim, Norway

[5] Kyushu Univ, Dept Mech Engn, Fukuoka, Fukuoka 8190395, Japan

来源：

MATERIALS CHARACTERIZATION | 2019年 / 158卷

基金：

日本科学技术振兴机构;

关键词：

Aluminum alloys; Precipitation; Microstructure; MgZn2; Transmission electron microscopy; Density functional theory; DECOMPOSITION PROCESSES; HAADF-STEM; BEHAVIOR; ZONES;

D O I：

10.1016/j.matchar.2019.109958

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Characterization of precipitates in Al-Zn-Mg alloys, using a combination of electron diffraction, bright field transmission electron microscopy and atomic scale scanning transmission electron microscopy imaging revealed the presence of an unreported eta(13) orientation relationship between the eta-MgZn2 phase and the Al lattice with the following orientation relationship (0001)(eta) parallel to (120)(Al) and (2110)(eta) parallel to (001)(Al), plate on (120)(Al). The precipitate interfaces were observed and analyzed along two projections 90 degrees to one-another. The precipitate coarsening was through the common thickening ledge mechanism. The ledges were significantly stepped along one lateral direction. An interface relaxation model using density functional theory was carried out to explain the precipitate behavior.

引用

页数：7

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