Cr-Mo-V-W: A new refractory and transition metal high-entropy alloy system

D. Ikeuchi, D. J.M. King, K. J. Laws, A. J. Knowles, R. D. Aughterson, G. R. Lumpkin, E. G. Obbard*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Cr-Mo-V-W high-entropy alloy (HEA) is studied, with 2553 K equilibrium solidus and high Cr content to promote protective oxide scale formation, suggesting potential applications in hot, oxidising environments. Alloy Search and Predict (ASAP) and phase diagram calculations found a single phase, body-centred cubic (BCC) solid solution at elevated temperatures, across the range of compositions present within the system - uncommon for a HEA of refractory and transition metals. Density functional theory identified solubility of 22 at.% Cr at solidus temperature, with composition-dependent drive for segregation during cooling. An as-cast, BCC single-phase with the composition 31.3Cr-23.6Mo-26.4 V-18.7 W exhibiting dendritic microsegregation was verified.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalScripta Materialia
Volume158
Early online date9 Sept 2018
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Alloy Search and Predict (ASAP)
  • CALPHAD
  • Density functional theory (DFT)
  • Microstructure
  • Refractory metals

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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