Duplex Nucleation and Its Effect on the Grain Size and Properties of Near Eutectic Al-Si Alloys
Abstract
:1. Introduction
2. Experimental Materials and Methods
2.1. Material Preparation
2.2. Material Characterization
3. Result and Discussion
3.1. Effect of Duplex Nucleation on the Grain Size and Microstructure of Near Eutectic Al-Si Alloy
3.2. Effect of Al-2Ti-0.5B-0.5C on the Microstructure and Properties of Al-12Si-4Cu-2Ni-1Mg Alloys
4. Conclusions
- (1)
- TiB2 particles can improve the nucleation efficiency of AlP particles by duplex nucleation with AlP particles. During the duplex nucleation process, The Al phase coating on the surface of TiB2 particles not only ensures that TiB2 particles can promote the nucleation of AlP particles, but also ensures that TiB2 particles can coexist with AlP particles in the core of primary silicon
- (2)
- The Al-2Ti-0.5B-0.5C master alloy can play a role in grain refinement of near-eutectic Al-Si alloy, it can affect the three-dimensional structure constructed by the alloy phase and eutectic silicon of Al-12Si-4Cu-2Ni-1Mg, and improve the fatigue property of the alloy. After adding 0.5% Al-2Ti-0.5B-0.5C master alloy, the ultimate tensile strength and elongation of Al-12Si-4Cu-2Ni-1Mg alloy at room temperature are about 355 MPa and 0.25%, respectively. The ultimate tensile strength at 350 °C is about 89 MPa, and the elongation is about 10.5%. The fatigue property of the alloy can be greatly improved when adding 1% Al-2Ti-0.5B-0.5C master alloy.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Al | Si | Cu | Mg | Ni | |
---|---|---|---|---|---|
A1 | 85.82 | 13.09 | 1.09 | 0 | 0 |
B1 | 79.88 | 13.32 | 3.56 | 0.91 | 2.33 |
Alloys | Connectivity Rate I (%) | Euler Number Χ | Structure Thickness Φ (μm) |
---|---|---|---|
B1 | 12.24 | 26,602 | 5.03 |
B4 | 19.38 | 75,132 | 6.04 |
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Li, W.; Wu, Y.; Wu, Y.; Li, Y.; Ehti, A.; Liu, X. Duplex Nucleation and Its Effect on the Grain Size and Properties of Near Eutectic Al-Si Alloys. Materials 2022, 15, 2507. https://doi.org/10.3390/ma15072507
Li W, Wu Y, Wu Y, Li Y, Ehti A, Liu X. Duplex Nucleation and Its Effect on the Grain Size and Properties of Near Eutectic Al-Si Alloys. Materials. 2022; 15(7):2507. https://doi.org/10.3390/ma15072507
Chicago/Turabian StyleLi, Wenbo, Yuying Wu, Yongjie Wu, Yang Li, Amanisha Ehti, and Xiangfa Liu. 2022. "Duplex Nucleation and Its Effect on the Grain Size and Properties of Near Eutectic Al-Si Alloys" Materials 15, no. 7: 2507. https://doi.org/10.3390/ma15072507