Study of Corrosion, Structural, and Mechanical Properties of EN AW-6082 and EN AW-7075 Welded Joints
Abstract
:1. Introduction
2. Materials and Test Methodology
3. Results and Discussion
3.1. Metallographic Tests
3.2. Tests of Mechanical Properties
3.3. Corrosion Tests
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Aluminum Alloy | Chemical Composition, wt % | ||||||||
---|---|---|---|---|---|---|---|---|---|
Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Al | |
EN AW-6082 | 0.70–1.30 | 0.45–0.55 | 0.08–0.12 | 0.40–1.00 | 0.60–1.20 | 0.23–0.27 | 0.18–0.22 | 0.08–0.12 | Balance |
Analysis | 1.21 | 0.46 | 0.11 | 0.55 | 1.17 | 0.22 | 0.21 | 0.12 | Balance |
EN AW-7075 | max 0.40 | max 0.50 | 1.20–2.00 | max 0.30 | 2.10–2.90 | 0.18–0.28 | 5.10–6.10 | max 0.20 | Balance |
Analysis | 0.32 | 0.39 | 1.25 | 0.25 | 2.52 | 0.20 | 5.91 | 0.17 | Balance |
S Al 5183 | 0.20–0.30 | max 0.20 | max 0.10 | 0.70–0.80 | max 4.5 | max 0.10 | - | max 0.10 | Balance |
Type of Joint | Force [N] | Shear/Tensile Strength [MPa] | Average Strength [MPa] | Standard Deviation [MPa] |
---|---|---|---|---|
Lap joints with EN AW-7075 alloy in the up position | 11,950 | 159.3 | 152.6 | 4.9 |
11,250 | 150.0 | |||
11,150 | 148.7 | |||
11,700 | 156.0 | |||
11,000 | 146.7 | |||
11,600 | 154.7 | |||
Lap joint with EN AW-7075 alloy in reverse configuration | 7900 | 105.3 | 105.1 | 4.6 |
7300 | 97.3 | |||
8000 | 106.7 | |||
8100 | 108.0 | |||
7700 | 102.7 | |||
8300 | 110.6 | |||
Butt joints of EN AW-7075 alloy | 28,750 | 383.3 | 375.9 | 6.0 |
27,800 | 370.7 | |||
27,700 | 369.3 | |||
28,600 | 381.3 | |||
28,400 | 378.7 | |||
27,900 | 372.0 |
Type of Joint | Zone | Microhardness [HV 0.05] | Average Microhardness [HV 0.05] | Standard Deviation [HV 0.05] | ||||
---|---|---|---|---|---|---|---|---|
Lap joints with EN AW-7075 alloy in the up position | BS (EN AW-6082) | 80.1 | 86.3 | 85.8 | 80.5 | 84.8 | 83.5 | 3.0 |
HAZ (EN AW-6082) | 78.8 | 77.5 | 84.4 | 76.9 | 82.5 | 80.0 | 3.2 | |
Weld | 101.4 | 109.7 | 107.5 | 109.8 | 103.4 | 106.4 | 3.8 | |
HAZ (EN AW-7075) | 98.4 | 99.6 | 112.4 | 119.8 | 124.5 | 110.9 | 11.7 | |
BS (EN AW-7075) | 137.1 | 141.4 | 139.8 | 141.2 | 137.6 | 139.4 | 2.0 | |
Lap joint with EN AW-7075 alloy in reverse configuration | BS (EN AW-6082) | 84.2 | 80.3 | 82.8 | 78.9 | 84.7 | 82.1 | 2.5 |
HAZ (EN AW-6082) | 80.9 | 82.6 | 79.9 | 82.7 | 79.6 | 81.2 | 1.5 | |
Weld | 104.6 | 108.3 | 106.7 | 103.9 | 111.2 | 106.9 | 2.9 | |
HAZ (EN AW-7075) | 101.3 | 106.9 | 115.8 | 120.1 | 127.9 | 114.4 | 10.5 | |
BS (EN AW-7075) | 140.5 | 137.2 | 138.1 | 137.5 | 139.6 | 138.5 | 1.4 | |
Butt joints of EN AW-7075 alloy | BS (EN AW-7075) | 138.8 | 136.4 | 141.2 | 137.8 | 138.1 | 138.4 | 1.7 |
HAZ (EN AW-7075) | 130.5 | 124.6 | 116.5 | 108.9 | 101.3 | 116.36 | 11.7 | |
Weld | 102.1 | 105.3 | 101.5 | 107.2 | 103.6 | 103.94 | 2.3 | |
HAZ (EN AW-7075) | 99.5 | 102.3 | 111.8 | 118.3 | 125.4 | 111.46 | 10.8 | |
BS (EN AW-7075) | 140.1 | 138.7 | 135.7 | 137.5 | 136.2 | 137.6 | 1.8 |
Zone of Measurement | Chemical Composition, wt % | |||||
---|---|---|---|---|---|---|
Fe | Cu | Mg | Zn | O | Al | |
EN AW-7075 alloy | 0.3 | 1.9 | 3.2 | 7.1 | 1.1 | Balance |
Transition zone | 0.4 | 1.4 | 1.6 | 3.1 | 2.7 | Balance |
Heat affected zone | 0.4 | 1.6 | 2.0 | 5.8 | 1.3 | Balance |
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Wojdat, T.; Kustroń, P.; Jaśkiewicz, K.; Pabian, J. Study of Corrosion, Structural, and Mechanical Properties of EN AW-6082 and EN AW-7075 Welded Joints. Materials 2021, 14, 4349. https://doi.org/10.3390/ma14164349
Wojdat T, Kustroń P, Jaśkiewicz K, Pabian J. Study of Corrosion, Structural, and Mechanical Properties of EN AW-6082 and EN AW-7075 Welded Joints. Materials. 2021; 14(16):4349. https://doi.org/10.3390/ma14164349
Chicago/Turabian StyleWojdat, Tomasz, Paweł Kustroń, Karol Jaśkiewicz, and Jarosław Pabian. 2021. "Study of Corrosion, Structural, and Mechanical Properties of EN AW-6082 and EN AW-7075 Welded Joints" Materials 14, no. 16: 4349. https://doi.org/10.3390/ma14164349