Microstructure and Room Temperature Properties of a High-Entropy TaNbHfZrTi Alloy (Postprint)

Abstract

A new refractory alloy, Ta20Nb20Hf20Zr20Ti20, produced by vacuum arc-melting followed by hot isostatic pressing (HIPing) at T = 1473K and P = 207MPa for 3 h has predominantly a single-phase body-centered cubic (BCC) structure with the lattice parameter a = 340.4 pm. The alloy density and Vickers microhardness are p = 9.94 g/cm3 and Hv = 3826 MPa. The alloy has high compression yield strength (o0 2 = 929 MPa) and ductility ( > 50%). The alloy shows considerable strain hardening and homogeneous deformation. A simple model of solid-solution strengthening is proposed to explain the behavior.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2014
Accession Number
ADA618351

Entities

People

  • C. F. Woodward
  • Daniel Miracle
  • J. M. Scott
  • Oleg N. Senkov
  • S. V. Senkova

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Arc Melting
  • Compression
  • Crystal Lattices
  • Crystal Structure
  • Distortion
  • Ductility
  • Governments
  • Hardening
  • Hardness
  • Materials
  • Mechanical Properties
  • Microhardness
  • Solid Solutions
  • Strain Hardening
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.