This study uses high-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED), and energy-dispersive X-ray spectroscopy to identify the crystal structure of a metastable phase in a Ag-added Al-Mg-Si alloy, which we compared with the crystal structure of the β′ -phase in Al-Mg-Si alloys without Ag. SAED patterns and HRTEM images of the β′ -phase in the Ag-added Al-Mg-Si alloy were similar to those of the β′ -phase in the Al-Mg-Si alloy without Ag. However, the lattice spacings were modified by the substitution of Ag into the β′ -phase. Analyses of the obtained HRTEM images and SAED patterns revealed that the β′ -phase has a more complex crystal lattice that consists of large (0.69 nm) and small (0.24 nm) hexagons. Discrete variational (DV-Xα) calculations were applied to the small cluster of the β′-phase. The results indicate that it should be possible to substitute silver in the β′- phase.
|ジャーナル||Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals|
|出版ステータス||Published - 2011 3月|
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