Excellent strength-ductility synergy in as-cast Al0.6CoCrFeNi2Mo0.08V0.04 high-entropy alloy at room and cryogenic temperatures

The Al0.6CoCrFeNi2Mo0.08V0.04 high-entropy alloy was prepared by vacuum induction melting. The alloy presented dendrite and inter-dendrite microstructure and showed excellent strength-ductility synergy at room and cryogenic temperatures. At room temperature, the yield strength reached 400 MPa while the elongation exceeded to 39%. With the decrease of temperatures, the yield strength, fracture strength, and the elongation were all improved. The maximum yield strength reached 560 MPa at -196 degrees C and the elongation exceeded 42%. The fracture mechanism was mainly a dimple-type ductile fracture. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The Al0.6CoCrFeNi2Mo0.08V0.04 high-entropy alloy exhibited dendritic and inter-dendritic microstructure and showed excellent strength-ductility synergy at both room and cryogenic temperatures. As the temperature decreased, the alloy demonstrated improved yield strength, fracture strength, and elongation, with the maximum yield strength reaching 560 MPa at -196 degrees C and an elongation exceeding 42%. The fracture mechanism mainly involved dimple-type ductile fracture.