Influence of Cold Rolled Deformation Degree and Heating Rates on Crystallite Dimension and Recrystallization Fraction of Aluminum Plates
Abstract
:1. Introduction
2. Experiment
3. Results and Discussions
3.1. Initial Microstructure of Aluminum Plate
3.2. Cold Rolled Microstructure of Aluminum Plate
3.3. Annealed Microstructure of Aluminum Plates
3.4. Micro-Orientation Analysis of Aluminum Plate
3.5. Annealed Crystallite Dimension of Aluminum Plate
3.6. Effect of Temperature and Heating Rate on Recrystallization Fraction
4. Conclusions
- (1)
- Grain distortion and deformation storage energy are mainly attributed to the CR deformation degree, and after a serious CR deformation, no complete grains can be observed. When the CR deformation degree increases to 85% and 98%, the deformed microbands are very small, with a band spacing of about 5~10 μm. At this time, most of the grains will have broken, the grain boundary is not clear, dislocation packing, and other defects become serious with the increase in dislocation density, and the distortion energy generated by the lattice distortion is also increasing.
- (2)
- As the heating rate increases to 100 °C/min, the sample cannot recover quickly and directly enters the recrystallization stage, which is due to the high heating rate. Most of the deformation storage energy as the driving force is directly used for recrystallization and grain growth. In the rapid annealing process, it is controlled by the heating rate due to the short nucleation and incubation period, and most of the deformation storage energy is used for pre-existing cores that can grow rapidly and consume the deformed substructures. Finally, the recrystallization is completed, and the grains grow subsequently.
- (3)
- Orientation imaging and misorientation angle analysis show that the red oriented grains of the (001) plane are preferred to nucleate and grow the grains. After the recrystallization process is completed, abnormal grain growth behavior appears, and the complete recrystallized grain structure is not uniform; some of the grains are relatively coarse, which is caused by the different annealing heating rates and recrystallization driving forces.
Author Contributions
Funding
Conflicts of Interest
References
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Chemical Elements | Al | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti |
---|---|---|---|---|---|---|---|---|---|
Mass content | Bal. | 7 | 10 | 12 | 2 | 16 | 1 | 3 | 1 |
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Wang, Y.; Ren, L.; Dong, J.; Cao, C. Influence of Cold Rolled Deformation Degree and Heating Rates on Crystallite Dimension and Recrystallization Fraction of Aluminum Plates. Crystals 2021, 11, 1428. https://0-doi-org.brum.beds.ac.uk/10.3390/cryst11111428
Wang Y, Ren L, Dong J, Cao C. Influence of Cold Rolled Deformation Degree and Heating Rates on Crystallite Dimension and Recrystallization Fraction of Aluminum Plates. Crystals. 2021; 11(11):1428. https://0-doi-org.brum.beds.ac.uk/10.3390/cryst11111428
Chicago/Turabian StyleWang, Yunlei, Liping Ren, Jingren Dong, and Chuanchuan Cao. 2021. "Influence of Cold Rolled Deformation Degree and Heating Rates on Crystallite Dimension and Recrystallization Fraction of Aluminum Plates" Crystals 11, no. 11: 1428. https://0-doi-org.brum.beds.ac.uk/10.3390/cryst11111428