Effects of Reinforcement Volume Fraction on Mechanical Properties and Microstructures of 7075Al Matrix Composites Reinforced by FeCoCrNiAl High-Entropy Alloy Particles
Abstract
:1. Introduction
2. Experimental
2.1. Fabrication of HEAp/Al Composites
2.2. Testing and Characterization
3. Results and Discussion
3.1. X-ray Diffraction Patterns of HEAp/Al Composites
3.2. Microstructure of HEAp/Al Composites
3.3. Interface Microstructure of HEAp/Al Composites
3.4. Hardness of HEAp/Al Composites
3.5. Mechanical Properties and Failure of HEAp/Al Composites
4. Conclusions
- FeCoCrNiAl high-entropy alloy particles (HEAp) reinforced 7075Al matrix composites (HEAp/Al) with dense microstructure and homogeneous distribution of reinforcement were fabricated by vacuum hot pressing sintering process at 580 °C, 30 MPa with 10 min holding time;
- With the increase of HEAp volume fractions, the hardness of HEAp/Al composites increase and have a larger value compared with the 7075Al matrix. While flexural strength and fracture toughness of HEAp/Al composites increase first and then decrease. the HEAp/Al composites with HEAp volume fraction of 10 vol% show the highest maximum value of ~640 MPa and ~13.67 MPa·m1/2 and temperate density with the value of 3.19 g/cm3, respectively. The strengthening effect including load transfer effect and dislocation strengthening behavior increased with the improvement of HEAp content from 5 vol% to 15 vol%, while it was weakened when HEAp was up to 20 vol%.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Gao, C.; Wang, Q.; Wei, M.; Fan, H.; Zhao, L.; Wei, Y.; Ma, Q. Effects of Reinforcement Volume Fraction on Mechanical Properties and Microstructures of 7075Al Matrix Composites Reinforced by FeCoCrNiAl High-Entropy Alloy Particles. Metals 2022, 12, 851. https://doi.org/10.3390/met12050851
Gao C, Wang Q, Wei M, Fan H, Zhao L, Wei Y, Ma Q. Effects of Reinforcement Volume Fraction on Mechanical Properties and Microstructures of 7075Al Matrix Composites Reinforced by FeCoCrNiAl High-Entropy Alloy Particles. Metals. 2022; 12(5):851. https://doi.org/10.3390/met12050851
Chicago/Turabian StyleGao, Changqi, Qiaobo Wang, Mingyu Wei, Hongjing Fan, Libo Zhao, Yupeng Wei, and Qin Ma. 2022. "Effects of Reinforcement Volume Fraction on Mechanical Properties and Microstructures of 7075Al Matrix Composites Reinforced by FeCoCrNiAl High-Entropy Alloy Particles" Metals 12, no. 5: 851. https://doi.org/10.3390/met12050851