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- Title
Effect of Mn content on microstructure and properties of AlCrCuFeMn<sub>x</sub> high-entropy alloy.
- Authors
Ning Wang; Kai Ma; Qiu-da Li; Yu-dong Yuan; Yan-chun Zhao; Li Feng
- Abstract
AlCrCuFeMnx (x=0, 0.5, 1, 1.5, and 2) high-entropy alloys were prepared using the vacuum arc melting technology. The microstructure and mechanical properties of AlCrCuFeMnx were analyzed and tested by XRD, SEM, TEM, nanoindentation, and electronic universal testing. The results indicate that the AlCrCuFeMnx high-entropy alloy exhibits a dendritic structure, consisting of dendrites with a BCC structure, interdendrite regions with an FCC structure, and precipitates with an ordered BCC structure that form within the dendrite. Manganese (Mn) has a strong affinity for dendritic, interdendritic, and precipitate structures, allowing it to easily enter these areas. With an increase in Mn content, the size of the precipitated nanoparticles in the dendritic region initially increases and then decreases. Similarly, the area fraction initially decreases and then increases. Additionally, the alloy's strength and wear resistance decrease, while its plasticity increases. The AlCrCuFeMn1.5 alloy boasts excellent mechanical properties, including a hardness of 360 HV and a wear rate of 2.4×10-5 mm³ ·N-1·mm-1. It also exhibits impressive yield strength, compressive strength, and deformation rates of 960 MPa, 1,700 MPa, and 27.5%, respectively.
- Subjects
FACE centered cubic structure; BODY centered cubic structure; VACUUM arcs; MICROSTRUCTURE; DENDRITIC crystals
- Publication
China Foundry, 2024, Vol 21, Issue 2, p147
- ISSN
1672-6421
- Publication type
Article
- DOI
10.1007/s41230-024-3031-z