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

Bendo, A.*; 前田 朋克*; 松田 健二*; Lervik, A.*; Holmestad, R.*; Marioara, C. D.*; 西村 克彦*; 布村 紀男*; 戸田 裕之*; 山口 正剛  ; 池田 賢一*; 本間 智之*

Bendo, A.*; Maeda, Tomoyoshi*; Matsuda, Kenji*; Lervik, A.*; Holmestad, R.*; Marioara, C. D.*; Nishimura, Katsuhiko*; Nunomura, Norio*; Toda, Hiroyuki*; Yamaguchi, Masatake; Ikeda, Kenichi*; Homma, Tomoyuki*

High angle annular dark field scanning transmission electron microscopy has been employed to observe precipitate structures in Al-Zn-Mg and Mg-Zn alloys. $$eta_{1}$$ precipitate structures in Al-Zn-Mg are commonly formed by MgZn$$_2$$ Penrose bricks, but also frequently observed to incorporate Mg$$_6$$Zn$$_7$$ elongated hexagons via two different modes. Tilings of MgZn$$_2$$ and Mg$$_6$$Zn$$_7$$ building blocks in both $$beta'_{1}$$ in Mg-Zn and $$eta_{1}$$ in Al-Zn-Mg alloys, create overall patterns which deviate from the chemical and structural configuration of solely monoclinic Mg$$_4$$Zn$$_7$$ or MgZn$$_2$$ unit cells. Precipitate morphologies were found to be correlated to their internal sub-unit cell arrangements, especially to Mg$$_6$$Zn$$_7$$ elongated hexagons.

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パーセンタイル:17.58

分野:Materials Science, Multidisciplinary

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