Temperature Influence on Formability and Microstructure of AZ31B during Electric Hot Temperature-Controlled Incremental Forming
Abstract
:1. Introduction
2. Experimental Procedure
3. Results and Discussions
3.1. Temperature Difference
3.2. Formability
3.2.1. Fracture Depth
3.2.2. Deformation Force
3.2.3. Strain Distribution
3.3. Microstructure Evolution
3.4. Fracture Characteristic
3.5. Microhardness
4. Conclusions
- The optimized controlled forming temperature of the AZ31B EHIF process was 300 °C. The fracture depth increased from 3.4 mm to 7.2 mm, which presented an increase of 112% compared with the traditional ISF at room temperature.
- The deformation force decreased and the major strain increased with the increasing temperature, which proved the formability enhancement of AZ31B sheet. The forming force dropped significantly and remained stable when the set temperature was higher than 250 °C.
- The temperature presented the greatest influence on the microstructure of the final forming zone when compared with the bending forming zone and the middle forming zone. DRX became the main deformation coordination mechanism above 250 °C and significantly improved the formability of AZ31B sheet.
- The fracture behavior of specimens changed from the typical brittle fracture to the ductile fracture from 20 °C to 250 °C due to the improvement in plasticity.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
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Zhang, H.; Chu, X.; Lin, S.; Bai, H.; Sun, J. Temperature Influence on Formability and Microstructure of AZ31B during Electric Hot Temperature-Controlled Incremental Forming. Materials 2021, 14, 810. https://doi.org/10.3390/ma14040810
Zhang H, Chu X, Lin S, Bai H, Sun J. Temperature Influence on Formability and Microstructure of AZ31B during Electric Hot Temperature-Controlled Incremental Forming. Materials. 2021; 14(4):810. https://doi.org/10.3390/ma14040810
Chicago/Turabian StyleZhang, Haoran, Xingrong Chu, Shuxia Lin, Huawei Bai, and Jiao Sun. 2021. "Temperature Influence on Formability and Microstructure of AZ31B during Electric Hot Temperature-Controlled Incremental Forming" Materials 14, no. 4: 810. https://doi.org/10.3390/ma14040810