Refractory High-Entropy Alloys (Preprint)

Abstract

Two refractory alloys, W-Nb-Mo-Ta and W-Nb-Mo-Ta-V, with near-equiatomic compositions were produced by vacuum arc-melting. Both alloys have a single-phase body-centered cubic (BCC) structure. The lattice parameters a = 3.2134 A for the quaternary alloy and a = 3.1832 A for the quinternary alloy were determined with the use of a high-energy X-ray diffraction and the scattering vector length range from 0.7 to 20 A-1. The alloy density and Vickers microhardness were p = 13.75 g/cm3 and Hv = 4455 MPa for the W-Nb-Mo-Ta alloy and p = 12.36 g/cm3 and Hv = 5250 MPa for the W-Nb-Mo- Ta-V alloy. The higher microhardness was related to the finer grain structure in the quinternary alloy.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2011
Accession Number
ADA550824

Entities

People

  • C. P. Chuang
  • D. B. Miracle
  • G. B. Wilks
  • O.N. Senkov
  • P. K. Liaw

Organizations

  • Universal Energy Systems

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Arc Melting
  • Corrosion Resistance
  • Crystal Lattices
  • Crystal Structure
  • Diffraction
  • High Energy
  • Materials
  • Materials Science
  • Mechanical Properties
  • Melting
  • Microhardness
  • Scattering
  • Solid Solutions
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.