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*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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.

Original languageEnglish
Title of host publicationNinth International Conference on Mechanical Engineering, Materials, and Automation Technology, MMEAT 2023
EditorsHuajun Dong, Hailiang Yu
PublisherSPIE
ISBN (Electronic)9781510668584
DOIs
Publication statusPublished - 2023
Event9th International Conference on Mechanical Engineering, Materials, and Automation Technology, MMEAT 2023 - Dalian, China
Duration: 9 Jun 202311 Jun 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12801
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference9th International Conference on Mechanical Engineering, Materials, and Automation Technology, MMEAT 2023
Country/TerritoryChina
CityDalian
Period9/06/2311/06/23

Keywords

  • Refractory high entropy alloy
  • ductility
  • specific strength

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