Effect of Crystallographic Orientations on Bendability in a Strongly Textured Mg-9Al Extrusion Plate and Texture Evolution during Three-Point Bending
Abstract
:1. Introduction
2. Experiments
3. Results
3.1. Initial Microstructure and Texture
3.2. Bending Performance
3.3. Microstructure and Texture during Bending
4. Discussion
4.1. Dependence of Bendability on Grain Orientation
4.2. Deformation Mechanisms and Their Effect on Texture Evolution
4.2.1. Tensile Twinning
4.2.2. Contraction Twinning
4.2.3. Prismatic <a> Slip
4.2.4. Basal Slip
4.2.5. Effect of Deformation Mechanisms on Texture Evolution
4.3. The Critical Role of Texture on Bendability
5. Summary
- The strongly-textured Mg-9Al plate has a relatively low bendability when bent along ED, TD, and TTD; when bent along the 45°, the plate’s bendability is dramatically enhanced.
- Bending along the three orthogonal directions activates extensive tensive twinning and prismatic slip while bending along the 45° direction activates mainly basal slip.
- The texture evolves uniformly towards the formation of basal textures when bent along all four directions: at the tension side of the bars, the basal plane is reoriented parallel to the direction of tensile stress, while on the inner side, the basal plane is reoriented perpendicular to the direction of compressive stress.
- The transforming efficiency towards the basal textures is high by {102} twinning and low by basal slip. The 45° bar’s high bendability can be explained by its efficiency in forming the basal textures during bending, and subsequently, the occurrence of contraction twins and fracture is postponed.
- This study shows that bendability can be improved by adjusting orientation, and the primary focus should be on those methods with which basal slip is enhanced.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Direction | 3 mm Ten | 3 mm Comp | Fracture/12 mm Ten | Fracture/12 mm Comp |
---|---|---|---|---|
ED | 0.5% | 28% | 3% | 94% |
TD | 5.7% | 14.7% | 36.5% | 55% |
TTD | 19% | 8.4% | 60.5% | 25% |
45° | 5.8% | 3% | 20.7% | 12% |
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Wei, J.; Jiang, S.; Wan, Y.; Liu, C. Effect of Crystallographic Orientations on Bendability in a Strongly Textured Mg-9Al Extrusion Plate and Texture Evolution during Three-Point Bending. Materials 2023, 16, 2518. https://doi.org/10.3390/ma16062518
Wei J, Jiang S, Wan Y, Liu C. Effect of Crystallographic Orientations on Bendability in a Strongly Textured Mg-9Al Extrusion Plate and Texture Evolution during Three-Point Bending. Materials. 2023; 16(6):2518. https://doi.org/10.3390/ma16062518
Chicago/Turabian StyleWei, Jiansheng, Shunong Jiang, Yingchun Wan, and Chuming Liu. 2023. "Effect of Crystallographic Orientations on Bendability in a Strongly Textured Mg-9Al Extrusion Plate and Texture Evolution during Three-Point Bending" Materials 16, no. 6: 2518. https://doi.org/10.3390/ma16062518