Abstract
Deformation twins in Mg–Gd alloys are investigated. It is found that the dominant twinning mode switches from {101¯2} twinning to {112¯1} twinning, with an increase in the Gd concentration in Mg. Our first-principles calculations suggest that the formation of the {112¯1} twin in the Gd-rich alloy is triggered by the reduced {112¯1} twin boundary energy, which results from strain relaxation along the twin boundary. Furthermore, this twinning mode is suggestive to be activated in other Mg alloys with a high concentration of solute atoms having larger size than Mg.
Original language | English |
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Pages (from-to) | 62-66 |
Number of pages | 5 |
Journal | Scripta Materialia |
Volume | 191 |
DOIs | |
Publication status | Published - 15 Jan 2021 |
Keywords
- Deformation twins
- First-principles calculations
- Mg alloys
- Twin boundary