Effect of Al content on microstructure and mechanical properties of as-cast AlxFeMnNiCrCu0.5 high-entropy alloys

AlxFeMnNiCrCu0.5 (x = 0.0, 0.25, 0.5, 1.0) high-entropy alloys have been successfully fabricated by vacuum arc melting. The effect of the aluminum content (x) on the constituent phases, microstructural characteristics, and mechanical properties of the alloy was investigated in the as-cast state. The...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2022-01, Vol.832, p.142495, Article 142495
Main Authors: Nguyen, Thanhung, Huang, Ming, Li, Hongjun, Hong, Lin, Yang, Sen
Format: Article
Language:English
Subjects:
Aluminum
AlxFeMnNiCrCu0.5
Body centered cubic lattice
Electric arc melting
Elongation
Face centered cubic lattice
Hardness
Heat treating
High entropy alloys
High-entropy alloy
Mechanical properties
Microstructure
Phases
Tensile properties
Tensile property
Ultimate tensile strength
Vacuum arc melting
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Summary:AlxFeMnNiCrCu0.5 (x = 0.0, 0.25, 0.5, 1.0) high-entropy alloys have been successfully fabricated by vacuum arc melting. The effect of the aluminum content (x) on the constituent phases, microstructural characteristics, and mechanical properties of the alloy was investigated in the as-cast state. The results indicated that with an increase in the aluminum content, the phases of alloys varied from duplex FCC phases (x = 0.0) to duplex FCC phases plus BCC phase (x = 0.25), FCC phase plus duplex BCC phases (x = 0.5), and eventually to duplex BCC phases (x = 1.0). The hardness of alloys gradually increases from 216 HV to 518 HV when Al content increases from 0.0 to 1.0. However, more Al content cannot result in increasing tensile properties. Al0.25FeMnNiCrCu0.5 HEA shows remarkable comprehensive mechanical properties, which its hardness, yield strength, ultimate tensile strength, and elongation are 305 HV, 552 MPa, 924 MPa, and 16.8%, respectively. •The microstructure and mechanical properties of as-cast AlxFeMnNiCrCu0.5 HEAs were investigated.•The addition of Al resulted in the formation disordered BCC and ordered BCC phases.•The tensile strength and hardness of the HEAs are improved as the Al content increases.•The FCC/BCC mixture of Al0.25FeMnNiCrCu0.5 alloy exhibited good combination mechanical properties.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2021.142495