Abstract
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.
Original language | English |
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Pages (from-to) | 179-187 |
Number of pages | 9 |
Journal | Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals |
Volume | 75 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2011 Mar |
Keywords
- Aluminum-magnesium-silicon alloy
- Discrete variational (dv-xα) method
- High resolution transmission electron microscopy
- Precipitation
- Selected area electron diffraction pattern
- Silver addition
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry