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- Title
Microstructure and Mechanical Properties of AlCoCrFeNi High-Entropy Alloy-Reinforced Ti-Al Metallic-Intermetallic Composites.
- Authors
Wang, Enhao; Lv, Lisong; Kang, Fuwei; Zhao, Yicen; Li, Nanlin; Tian, Yao; Jiang, Wei
- Abstract
In this study, a novel high-entropy alloy-reinforced Ti-Al metallic-intermetallic laminated (HEA-MIL) composite was fabricated using vacuum hot pressing sintering. The microstructure characteristics of the HEA-MIL composite interface were examined through X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, and electron backscattered diffraction. The analysis revealed the presence of Al3Ti, a newly formed phase in the HEA-MIL composite, resulting from the Ti-Al reaction and forming a homogeneous intermetallic compound layer. Furthermore, the HEA layer exhibited a body-centered cubic structure with a uniform stress distribution. Additionally, the mechanical properties of HEA-MIL composites were evaluated through compression tests conducted at quasi-static strain rates. The results revealed that the average compressive strengths of the HEA-MIL composite were 1359.61 MPa (load perpendicular to layers) and 1258.47 MPa (load parallel to layers), with corresponding failure strains of 41.53% and 17.84%, respectively. Fracture analysis demonstrated a mixed fracture mechanism, with both ductile and brittle fractures observed in both perpendicular and parallel directions.
- Subjects
TITANIUM composites; MICROSTRUCTURE; BODY centered cubic structure; BRITTLE fractures; DUCTILE fractures; STRESS concentration
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2023, Vol 75, Issue 12, p5559
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-023-06100-1