Micro-texture-mediated dynamic hetero-deformation enabling high strength-ductility in a dilute Mg-Al-Ca-Mn alloy
Micro-texture design of hard-/soft-oriented grains improves Mg alloys' mechanical properties, while strength-ductility trade-off persists due to insufficient early-stage strengthening from soft-oriented grains and later-stage strain coordination in hard-oriented grains. Here, a TD-spread basal-...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-06-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/21663831.2025.2498647 |
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| Summary: | Micro-texture design of hard-/soft-oriented grains improves Mg alloys' mechanical properties, while strength-ductility trade-off persists due to insufficient early-stage strengthening from soft-oriented grains and later-stage strain coordination in hard-oriented grains. Here, a TD-spread basal-textured dilute Mg-1.27Al-0.38Ca-0.45Mn alloy architected by uniformly-mixed basal-/TD-/random-oriented grains was prepared by simple hard-plate rolling and short-time annealing. Interestingly, it features dynamic hetero-deformation as TD-oriented grains initially act as hard domains enhancing strength and later function as soft domains by activating multiple non-basal slips. Facilitated by such hard-to-soft transition of TD-oriented grains, a superior strength-ductility combination (yield strength of ∼218 MPa, elongation of ∼27.3%) was achieved. |
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| ISSN: | 2166-3831 |