Microstructure Evolution and Forming Characteristics of Post-Weld Composite Treatment of 6061 Aluminum Alloy Tailor Welded Blanks
Abstract
:Featured Application
Abstract
1. Introduction
2. Materials and Methods
3. Results
3.1. Microstructure
3.2. Hardness Distribution
3.3. Tensile Performance
3.4. Forming Performance
4. Discussion
4.1. Mechanical Property Consistency
4.2. Geometric Dimension Consistency
5. Conclusions
- (a)
- The CR process induces work hardening in the FZ and the HAZ. This leads to inconsistent mechanical properties within aluminum alloy joints. However, the CR process eliminates the DP-MIG weld excess metal and promotes overall geometric uniformity in the aluminum alloy TWBs.
- (b)
- The PWCR-SHT process enhances the ductility of the joints, and the hardness and tensile strength of the joint are lower than those of the original BM.
- (c)
- The PWCR-SHT process employs high-density dislocations as the SE, triggering recrystallization behavior in the FZ of the PWCR joints and grain growth in the part of the HAZ.
- (d)
- The forming rate of the PWCR-SHT TWBs is 119% of the BM, resulting from the combined effects of the geometric dimension and the mechanical property consistency.
6. Limitations and Future Works
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Materials | Mg | Si | Fe | Cu | Cr | Mn | Zn | Al |
---|---|---|---|---|---|---|---|---|
6061-T6 | 1.10 | 0.62 | 0.42 | 0.26 | 0.19 | 0.08 | 0.01 | Bal |
ER5356 | 4.90 | 0.05 | 0.12 | 0.01 | 0.12 | 0.12 | 0.01 | Bal |
Welding Current (I/A) | Base Current (Ib/A) | Peak Current (Ip/A) | Base Time (tb/ms) | Peak Time (tp/ms) | |||
---|---|---|---|---|---|---|---|
Low Pulse | High Pulse | Low Pulse | High Pulse | Low Pulse | High Pulse | ||
80 | 28 | 310 | 336 | 0.8 | 1.6 | 1.0 | 0.8 |
Sample | Description |
---|---|
AW | As-welded samples with no additional post-weld treatment process. |
PWCR | As-welded samples were processed by performing one rolling pass over the weld excess metal at room temperature |
PWSHT | As-welded samples were solution-treated at 520 °C for 1.5 h and water-quenched. |
PWCR-SHT | PWCR samples were solution-treated at 520 °C for 1.5 h and water-quenched. |
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Dong, X.; Song, G.; Liu, L. Microstructure Evolution and Forming Characteristics of Post-Weld Composite Treatment of 6061 Aluminum Alloy Tailor Welded Blanks. Appl. Sci. 2024, 14, 8998. https://doi.org/10.3390/app14198998
Dong X, Song G, Liu L. Microstructure Evolution and Forming Characteristics of Post-Weld Composite Treatment of 6061 Aluminum Alloy Tailor Welded Blanks. Applied Sciences. 2024; 14(19):8998. https://doi.org/10.3390/app14198998
Chicago/Turabian StyleDong, Xiaonan, Gang Song, and Liming Liu. 2024. "Microstructure Evolution and Forming Characteristics of Post-Weld Composite Treatment of 6061 Aluminum Alloy Tailor Welded Blanks" Applied Sciences 14, no. 19: 8998. https://doi.org/10.3390/app14198998