TY - JOUR
T1 - Characterisation of structural similarities of precipitates in Mg–Zn and Al–Zn–Mg alloys systems
AU - Bendo, Artenis
AU - Maeda, Tomoyoshi
AU - Matsuda, Kenji
AU - Lervik, Adrian
AU - Holmestad, Randi
AU - Marioara, Calin D.
AU - Nishimura, Katsuhiko
AU - Nunomura, Norio
AU - Toda, Hiroyuki
AU - Yamaguchi, Masatake
AU - Ikeda, Ken ichi
AU - Homma, Tomoyuki
PY - 2019/11/2
Y1 - 2019/11/2
N2 - High angle annular dark field scanning transmission electron microscopy has been employed to observe precipitate structures in Al–Zn–Mg and Mg–Zn alloys. 1 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 '1 in Mg–Zn and 1 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.
AB - High angle annular dark field scanning transmission electron microscopy has been employed to observe precipitate structures in Al–Zn–Mg and Mg–Zn alloys. 1 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 '1 in Mg–Zn and 1 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.
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U2 - 10.1080/14786435.2019.1637032
DO - 10.1080/14786435.2019.1637032
M3 - Article
AN - SCOPUS:85068623317
VL - 99
SP - 2619
EP - 2635
JO - Philosophical Magazine
JF - Philosophical Magazine
SN - 1478-6435
IS - 21
ER -