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Title: Deviation from high-entropy configurations in the atomic distributions of a multi-principal-element alloy

The alloy-design strategy of combining multiple elements in near-equimolar ratios has shown great potential for producing exceptional engineering materials, often known as high-entropy alloys . Understanding the elemental distribution, and, thus, the evolution of the configurational entropy during solidification, is undertaken in the present study using the Al1.3CoCrCuFeNi model alloy. Here we show that, even when the material undergoes elemental segregation, precipitation, chemical ordering and spinodal decomposition, a significant amount of disorder remains, due to the distributions of multiple elements in the major phases. The results suggest that the high-entropy alloy-design strategy may be applied to a wide range of complex materials, and should not be limited to the goal of creating single-phase solid solutions.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [3] ;  [7] ;  [7]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Instrument and Source Div.; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Sciences and Engineering
  2. Univ. of Illinois, Urbana, IL (United States). Dept. of Nuclear, Plasma, and Radiological Engineering
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Div.
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Div.
  5. National Energy Technology Lab. (NETL), Albany, OR (United States); URS Corporation, Albany, OR (United States)
  6. Materials Development inc., Evanston, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  7. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Sciences and Engineering
Publication Date:
OSTI Identifier:
1185345
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source
Sponsoring Org:
ORNL work for others
Country of Publication:
United States
Language:
English
Subject:
Intermetallic; High-entropy alloy; neutron scattering; microscopy