Mechanical Properties and Microstructural Evolution of 6082 Aluminum Alloy with Different Heat Treatment Methods
Abstract
:1. Introduction
2. Description of Materials and the Experimental Method
3. Experimental Results and Discussion
3.1. True Stress–True Strain Curves
3.2. Fracture Morphology
3.3. Microstructure Observation
4. Conclusions
- The yield strength of 6082 aluminum alloy after artificial aging treatment is significantly higher than that of solid solution treatment alloy; the yield strengths in three directions are around 340 MPa, because the precipitates in the matrix can effectively pin the dislocation and improve the deformation resistance. The yield strength of the 6082 alloy treated by the deep cryogenic aging process is slightly higher than that of artificially aged alloy because deep cryogenic treatment can promote the nucleation and precipitation of precipitates.
- The studied alloys in three different heat treatment conditions show ductile fracture characteristics. The elongation of the solid solution treatment alloy is over 16%; the fracture dimples are deep with high quantity. The elongation of artificially aged and cryogenic aged alloys is lower, and the dimple is shallower with a smaller size. The precipitates are potential stress concentration points during the tensile deformation process, which may lead to failure of the material.
- The solid solution alloy shows obvious mechanical properties of anisotropy, which is caused by the elongated grain. The anisotropy of artificially aging and deep cryogenic aging treatment alloys is not obvious. The reason is that the precipitates has a habitus plane; the large ratio of long and short axes during plastic deformation can inhibit the anisotropy caused by elongated grains.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Element | Fe | Cu | Si | Cr | Mg | Mn | Zn | Ti | Al |
---|---|---|---|---|---|---|---|---|---|
wt. % | 0.1 | 0.2 | 0.89 | 0.1 | 0.75 | 0.43 | 0.02 | 0.09 | Balance |
Type | Solution Treatment | Deep Cryogenic | Artificial Aging |
---|---|---|---|
SST | 535 °C/1.5 h; water quenching | - | - |
AAT | 535 °C/1.5 h; water quenching | - | 180 °C/8 h |
DCAT | 535 °C/1.5 h; water quenching | −196 °C/24 h | 180 °C/8 h |
Condition | As-Received | SST | AAT | DCAT |
---|---|---|---|---|
IPA (%) | 1.58 | 5.40 | 0.58 | 0.61 |
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Xia, E.; Ye, T.; Qiu, S.; Liu, J.; Luo, J.; Sun, L.; Wu, Y. Mechanical Properties and Microstructural Evolution of 6082 Aluminum Alloy with Different Heat Treatment Methods. Coatings 2024, 14, 602. https://doi.org/10.3390/coatings14050602
Xia E, Ye T, Qiu S, Liu J, Luo J, Sun L, Wu Y. Mechanical Properties and Microstructural Evolution of 6082 Aluminum Alloy with Different Heat Treatment Methods. Coatings. 2024; 14(5):602. https://doi.org/10.3390/coatings14050602
Chicago/Turabian StyleXia, Erli, Tuo Ye, Sawei Qiu, Jie Liu, Jiahao Luo, Longtao Sun, and Yuanzhi Wu. 2024. "Mechanical Properties and Microstructural Evolution of 6082 Aluminum Alloy with Different Heat Treatment Methods" Coatings 14, no. 5: 602. https://doi.org/10.3390/coatings14050602