Characterisation of structural similarities of precipitates in Mg-Zn and Al-Zn-Mg alloys systems

被引：32

作者：

Bendo, Artenis ^{[1
]}

Maeda, Tomoyoshi ^{[1
]}

Matsuda, Kenji ^{[1
]}

Lervik, Adrian ^{[2
]}

Holmestad, Randi ^{[2
]}

Marioara, Calin D. ^{[3
]}

Nishimura, Katsuhiko ^{[1
]}

Nunomura, Norio ^{[1
]}

Toda, Hiroyuki ^{[4
]}

Yamaguchi, Masatake ^{[5
]}

Ikeda, Ken-ichi ^{[6
]}

Homma, Tomoyuki ^{[7
]}

机构：

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

[2] Norwegian Univ Sci & Technol, Dept Phys, Trondheim, Norway

[3] SINTEF Ind, Trondheim, Norway

[4] Kyushu Univ, Dept Mech Engn, Fukuoka, Fukuoka, Japan

[5] Japan Atom Energy Agcy, Tokai, Ibaraki, Japan

[6] Hokkaido Univ, Fac Engn, Div Mat Sci & Engn, Sapporo, Hokkaido, Japan

[7] Nagaoka Univ Technol, Dept Mech Engn, Nagaoka, Niigata, Japan

来源：

PHILOSOPHICAL MAGAZINE | 2019年 / 99卷 / 21期

关键词：

HAADF-STEM; PHASES; MGZN2;

D O I：

10.1080/14786435.2019.1637032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High angle annular dark field scanning transmission electron microscopy has been employed to observe precipitate structures in Al-Zn-Mg and Mg-Zn alloys. precipitate structures in Al-Zn-Mg are commonly formed by MgZn2 Penrose bricks, but also frequently observed to incorporate Mg6Zn7 elongated hexagons via two different modes. Tilings of MgZn2 and Mg6Zn7 building blocks in both in Mg-Zn and in Al-Zn-Mg alloys, create overall patterns which deviate from the chemical and structural configuration of solely monoclinic Mg4Zn7 or MgZn2 unit cells. Precipitate morphologies were found to be correlated to their internal sub-unit cell arrangements, especially to Mg6Zn7 elongated hexagons. Systematic or random arrangements of Mg6Zn7 elongated hexagons inside precipitates and therefore compositional and structural patterns, were found to be strongly related to the aspect ratio of the precipitates and altering of the precipitate/matrix interfaces. [GRAPHICS]

引用

页码：2619 / 2635

页数：17

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