Deformation Mechanisms of Magnesium Alloys with Rare-Earth and Zinc Additions under Plane Strain Compression
Abstract
:1. Introduction
2. Materials and Methods
3. Results
3.1. Grain Information of the Initial Condition
3.2. Mechanical Properties of Channel Die Compression Samples
3.3. Deformation Behaviors of the Room Temperature Samples
3.4. Deformation Behaviors of the Elevated Temperature Samples
4. Discussion
4.1. Effects of Dislocation Slip on the Deformation Process
4.2. Effects of Twinning on the Deformation Process
5. Conclusions
- (1)
- Compared to the Mg–Nd binary alloy, the addition of Zn can significantly improve the ductility of the sample at room and elevated temperatures. The yield strength of the ZN12 is slightly lower than that of the N2, while their ultimate strengths are comparable.
- (2)
- A high activity of prismatic slip is observed in early deformation stage of the ZN12 sample. The multiple activation of different deformation modes, characterized by the sigmoidal yielding phenomenon, are beneficial to the strain accommodation.
- (3)
- The ZN12 sample shows a more advanced twinning activity than its counterpart, due to its favorable orientation and its dissociation of prismatic slip. However, the rapid growth of the same twin variant consumes the parent grain, leading to the orientation change from TD to basal components.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Alloy | Nd | Zn | Mg |
Mg-Nd (N2) | 1.75 | - | Balanced |
Mg-Zn-Nd (ZN12) | 1.71 | 1.07 | Balanced |
Yield Strength (MPa) | Ultimate Strength (MPa) | Fracture Strain (%) | |
---|---|---|---|
N2 RT | 120 ± 3.1 | 390 ± 6.8 | 11.1 ± 0.3 |
N2 ET | 104 ± 2.2 | 283 ± 4.0 | 8.3 ± 0.4 |
ZN12 RT | 95 ± 3.2 | 398 ± 7.3 | 14.9 ± 0.4 |
ZN12 ET | 87 ± 1.8 | 302 ± 6.6 | 17.7 ± 0.2 |
Early Stage | Middle Stage | Late Stage | |
---|---|---|---|
N2 RT | 4.2 | 10.5 | 13.0 |
N2 ET | 0 | 6.1 | 5.3 |
ZN12 RT | 6.9 | 20.6 | 18.8 |
ZN12 ET | 0.2 | 13.3 | 8.7 |
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Zeng, X.; Yi, S. Deformation Mechanisms of Magnesium Alloys with Rare-Earth and Zinc Additions under Plane Strain Compression. Materials 2024, 17, 33. https://doi.org/10.3390/ma17010033
Zeng X, Yi S. Deformation Mechanisms of Magnesium Alloys with Rare-Earth and Zinc Additions under Plane Strain Compression. Materials. 2024; 17(1):33. https://doi.org/10.3390/ma17010033
Chicago/Turabian StyleZeng, Xun, and Sangbong Yi. 2024. "Deformation Mechanisms of Magnesium Alloys with Rare-Earth and Zinc Additions under Plane Strain Compression" Materials 17, no. 1: 33. https://doi.org/10.3390/ma17010033