Absence of Long-Range Chemical Ordering in Equimolar FeCoCrNi

Abstract

Equimolar FeCoCrNi alloys have been the topic of recent research as "high-entropy alloys," where the name is derived from the high configurational entropy of mixing for a random solid solution. Despite their name, no systematic study of ordering in this alloy system has been performed to date. Here, we present results from anomalous x-ray scattering and neutron scattering on quenched and annealed samples. An alloy of FeNi3 was prepared in the same manner to act as a control. Evidence of long-range chemical ordering is clearly observed in the annealed FeNi3 sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks long-range chemical order.

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Document Details

Document Type
Technical Report
Publication Date
Jun 20, 2012
Accession Number
ADA576083

Entities

People

  • D. L. Abernathy
  • E. Michel
  • G. B. Wilks
  • J. A. Munoz
  • J. Horwath
  • L. Mauger
  • M. B. Stone
  • M. S. Lucas
  • Oleg N. Senkov
  • S. L. Serniatin

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Alloys
  • Crystal Structure
  • Cubic Lattices
  • Diffraction
  • Electron Microscopy
  • Energy
  • Heat Energy
  • Heat Treatment
  • Materials
  • Measurement
  • Neutron Scattering
  • Phase Diagrams
  • Radiation
  • Scattering
  • Solid Solutions
  • X Ray Scattering
  • X Rays

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.