Abstract
Eutectic high entropy alloys (EHEAs) have received widespread attention due to their excellent mechanical properties. This letter successfully used double-wire arc additive manufacturing technology to prepare a new type of Al20.33Co21.60Fe30.45Ni27.62 EHEA. Its phase composition, microstructure, and mechanical properties were characterized and studied. The alloy exhibited a biphasic lamellar eutectic microstructure composed of an ordered BCC (B2) phase and an ordered FCC (L12) phase. The ultimate tensile strength and elongation at room temperature are as high as 1022 MPa and 13.2 % respectively. Superior to most other EHEAs produced using casting and arc melting technologies. This approach has great potential in engineering applications.
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