Microstructures and Properties of V-Modified A380 Aluminum Alloy Produced by High Pressure Rheo-Squeeze Casting with Compound Field Treatment
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. Microstructures of as-Cast Gravity Casting Alloys with Different V Contents
3.2. Microstructures of the as-Cast Gravity Casting Alloys Treated by Different Physical Fields
3.3. Microstructures of the as-Cast Alloys Produced by HPRSC with UV-ES Compound Field Treatment
3.4. Mechanical Properties
4. Conclusions
- The addition of V to the A380 aluminum alloy leads to the formation of polygonal Si2V phase. With the increase in the V content, the size and volume fraction of Si2V phase are increased. However, the size and volume fraction of β-Al5FeSi phase are decreased.
- The refinement effects of UV, ES and UV-ES on the microstructure of the gravity casting alloys are as follows: UV-ES > UV > ES.
- The α-Al phase, intermetallic compounds, and eutectic structures of the HPRSC alloy with compound field treatment are all refined significantly as the pressure increases from 0 to 400 MPa. When the pressure is 400 MPa, the morphology of β-Al5FeSi phase is changed from an acicular to a fine fibrous-like one. The polygonal Si2V phase is transformed into fine particle with an average diameter of 8 μm.
- The UTS, YS, and elongation of the HPRSC alloys with compound field treatment are increased with the increasing pressure. As the pressure increases from 0 to 100 MPa, the UTS and elongation are increased sharply. When the pressure is greater than 200 MPa, the increase in UTS and elongation becomes slow. When the pressure is 400 MPa, the UTS, YS, and elongation of the T6 heat-treated alloy with 0.7% V are 301 MPa, 182 MPa, and 3.3%, respectively.
- Using the HPRSC process with compound field treatment, the UTS, YS, and elongation of the alloy without V are lower than that of the alloy with 0.7% V under the same pressure. With the decrease in the length of β-Al5FeSi phase, the quality index of the alloy is increased.
Author Contributions
Funding
Conflicts of Interest
References
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Alloy Code | Si | Cu | Fe | V | Al |
---|---|---|---|---|---|
A1 | 8.5 | 3.5 | 0.7 | 0 | Balance |
A2 | 8.5 | 3.5 | 0.7 | 0.35 | Balance |
A3 | 8.5 | 3.5 | 0.7 | 0.7 | Balance |
A4 | 8.5 | 3.5 | 0.7 | 1.05 | Balance |
Al | Si | Cu | V | Fe | |
---|---|---|---|---|---|
β-Al5FeSi | 61.06 ± 0.27 | 20.55 ± 0.16 | - | - | 18.39 ± 0.20 |
Al2Cu | 44.19 ± 0.19 | - | 55.81 ± 0.15 | - | - |
Si2V | 8.51 ± 0.11 | 59.92 ± 0.24 | - | 29.66 ± 0.31 | 1.91 ± 0.08 |
Vanadium Content (wt.%) | Average Length of β-Al5FeSi Phase (μm) | Volume Fraction of β-Al5FeSi Phase (%) | Average Diameter of Si2V Phase (μm) | Volume Fraction of Si2V Phase (%) |
---|---|---|---|---|
0 | 47 ± 6 | 2.48 ± 0.21 | - | - |
0.35 | 42 ± 5 | 2.07 ± 0.19 | 15 ± 1 | 0.30 ± 0.02 |
0.7 | 35 ± 3 | 1.74 ± 0.16 | 21 ± 2 | 0.68 ± 0.07 |
1.05 | 30 ± 2 | 1.44 ± 0.12 | 29 ± 4 | 0.95 ± 0.08 |
Alloy | Treatment Type | Average Length of β-Al5FeSi Phase (μm) | Average Diameter of Si2V Phase (μm) |
---|---|---|---|
A1 | None | 47 ± 6 | - |
UV | 26 ± 2 | - | |
ES | 36 ± 3 | - | |
UV-ES | 20 ± 2 | - | |
A3 | None | 35 ± 3 | 21 ± 2 |
UV | 23 ± 2 | 15 ± 1 | |
ES | 30 ± 3 | 18 ± 2 | |
UV-ES | 17 ± 1 | 12 ± 1 |
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Lin, C.; Chen, H.; Zeng, L.; Wu, S.; Fang, X. Microstructures and Properties of V-Modified A380 Aluminum Alloy Produced by High Pressure Rheo-Squeeze Casting with Compound Field Treatment. Metals 2021, 11, 587. https://doi.org/10.3390/met11040587
Lin C, Chen H, Zeng L, Wu S, Fang X. Microstructures and Properties of V-Modified A380 Aluminum Alloy Produced by High Pressure Rheo-Squeeze Casting with Compound Field Treatment. Metals. 2021; 11(4):587. https://doi.org/10.3390/met11040587
Chicago/Turabian StyleLin, Chong, Hanxin Chen, Li Zeng, Shusen Wu, and Xiaogang Fang. 2021. "Microstructures and Properties of V-Modified A380 Aluminum Alloy Produced by High Pressure Rheo-Squeeze Casting with Compound Field Treatment" Metals 11, no. 4: 587. https://doi.org/10.3390/met11040587