A novel (VNb)80(TaTi)20 refractory high entropy alloy with excellent mechanical properties at the as-cast state

Cunyong Wang; Qing Han; Benpeng Wang; Shihai Sun; Yunfei Xue; Ke Jin

doi:10.1117/12.3007214

25 October 2023 A novel (VNb)₈₀(TaTi)₂₀ refractory high entropy alloy with excellent mechanical properties at the as-cast state

Cunyong Wang, Qing Han, Benpeng Wang, Shihai Sun, Yunfei Xue, Ke Jin

Author Affiliations +

Proceedings Volume 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023); 128010O (2023) https://doi.org/10.1117/12.3007214
Event: Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 2023, Dalian, China

Abstract

Refractory high entropy alloys have excellent mechanical properties at high temperatures, while they are often restrained in engineering applications because of their poor ductility at room temperature as well as relatively high density. Equiatomic VNbTaTi alloy has exhibited outstanding combination of high-temperature strength and room temperature ductility, but its density 9.1 g/cm³ is still higher than several traditional refractory alloys. In this work, we develop a novel (VNb)₈₀(TaTi)₂₀ alloy in the as-cast state exhibiting an ultimate tensile strength of 921 MPa, combined with desired fracture elongation of 28% and uniform elongation of 13.1% at room temperature. The density of this alloy is only 8.1 g/cm³ , granting it superior specific strength at elevated temperatures, i.e., reaching 45 MPa·cm³ /g at 1100 °C.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Cunyong Wang, Qing Han, Benpeng Wang, Shihai Sun, Yunfei Xue, and Ke Jin "A novel (VNb)₈₀(TaTi)₂₀ refractory high entropy alloy with excellent mechanical properties at the as-cast state", Proc. SPIE 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 128010O (25 October 2023); https://doi.org/10.1117/12.3007214

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