Improving the Mechanical Properties of Al-Si Composites through the Synergistic Strengthening of TiB2 Particles and BN Nanosheets
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. Microscopic Morphology of Ball Milled Composites
3.2. Composition and Distribution of Intermetallic Phases in Composites
3.3. Morphology and Distribution of Si Phase in Composites
3.4. Microstructure of M142-BNNS-TiB2 Composite
3.5. Mechanical Properties of Composites
3.6. Fracture Morphology of Composite
4. Conclusions
- BNNS and micron TiB2 particles were introduced simultaneously in the ball milling process, which can realize the lamellarization and particle size refinement of M142 powder;
- The introduction of BNNS and micron TiB2 can realize the uniform refinement of the Si phase and intermetallic phase in M142-BNNS-TiB2;
- After T6 heat treatment, the M142-BN-TiB2 composite exhibits excellent comprehensive mechanical properties, with a UTS of 463 MPa (Compared with M142 and M142-BNNS, it has increased by 101 and 68 MPa, respectively) and an elongation of 2.6% (Compared with M142 and M142-BNNS, it has increased by 0.1% and 0.9%, respectively);
- The introduction of BNNS and micro-TiB2 changed the M142 fracture mode from brittle fracture to quasi-cleavage fracture. At the same time, the introduction of BNNS and micro-TiB2 to refine the Si phase and intermetallic phase can change the location of crack initiation in the composite, thus improving the ductility of the composite.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Hot Extrusion | T6 Heat Treatment | |
---|---|---|
M142 | 14.39 | 15.22 |
M142-BNNS | 3.05 | 5.79 |
M142-BNNS-TiB2 | 1.84 | 2.28 |
Hot Extruded | T6 | Size Increase (%) | |
---|---|---|---|
M142 | 23.52 | 27.85 | 18.40 |
M142-BNNS | 17.66 | 18.71 | 5.94 |
M142-BNNS-TiB2 | 14.23 | 14.63 | 2.81 |
Name of Sample | UST (MPa) | Elongation Rate (%) | |
---|---|---|---|
Hot extruded | M142 | 256 ± 6 | 5.7 ± 0.3 |
M142-BNNS | 301 ± 5 | 1.8 ± 0.3 | |
M142-BNNS-TiB2 | 313 ± 4 | 2.2 ± 0.4 | |
T6 heat treatment | M142 | 362 ± 4 | 2.5 ± 0.2 |
M142-BNNS | 395 ± 3 | 1.7 ± 0.1 | |
M142-BNNS-TiB2 | 463 ± 4 | 2.6 ± 0.2 |
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Wang, Y.; Wang, J.; Xu, Z.; Xu, B.; Yu, B.; Dong, J.; Li, C. Improving the Mechanical Properties of Al-Si Composites through the Synergistic Strengthening of TiB2 Particles and BN Nanosheets. Metals 2024, 14, 957. https://doi.org/10.3390/met14090957
Wang Y, Wang J, Xu Z, Xu B, Yu B, Dong J, Li C. Improving the Mechanical Properties of Al-Si Composites through the Synergistic Strengthening of TiB2 Particles and BN Nanosheets. Metals. 2024; 14(9):957. https://doi.org/10.3390/met14090957
Chicago/Turabian StyleWang, Yiren, Jian Wang, Zunyan Xu, Baoqiang Xu, Bingheng Yu, Jianwu Dong, and Caiju Li. 2024. "Improving the Mechanical Properties of Al-Si Composites through the Synergistic Strengthening of TiB2 Particles and BN Nanosheets" Metals 14, no. 9: 957. https://doi.org/10.3390/met14090957