Abstract
The secondary phases in quasicrystal-reinforced Mg-Zn-Gd alloys are investigated by transmission electron microscopy. The orientation relationships between the dendritic I-phase and the Mg matrix are identified to be [11 2¯ 0]Mg ∥[2-fold]I-phase and (0001)Mg ∥(5-fold)I-phase. We also find that the dendritic I-phase is brittle along 2-fold, 5-fold, and 3-fold atomic planes during hot extrusion. Moreover, new orientation relations [1¯ 101]Mg ∥[mirror 2-fold]I-phase and (0 1¯ 11)Mg ∥(5-fold)I-phase are found between nanoscale I-phase and Mg matrix. The findings have implications for our understanding of excellent mechanical properties of the I-phase-strengthened Mg alloys.
Original language | English |
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Article number | 8020 |
Pages (from-to) | 132-136 |
Number of pages | 5 |
Journal | Materials Characterization |
Volume | 108 |
DOIs | |
Publication status | Published - 2015 Oct 1 |
Keywords
- Extrusion
- Magnesium alloys
- Orientation
- Precipitation
- Quasicrystal
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering