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. In addition, 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.
- 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
- Univ. of Illinois, Urbana, IL (United States). Dept. of Nuclear, Plasma, and Radiological Engineering
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Div.
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Div.
- National Energy Technology Lab. (NETL), Albany, OR (United States); URS Corporation, Albany, OR (United States)
- Materials Development inc., Evanston, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Sciences and Engineering
- Publication Date:
- OSTI Identifier:
- Grant/Contract Number:
- AC05-00OR22725; FE0011194
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2041-1723
- Nature Publishing Group
- Research Org:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Univ. of Tennessee, Knoxville, TN (United States); Univ. of Illinois Urbana-Champaign, Champaign, IL (United States)
- Sponsoring Org:
- Work for Others (WFO); USDOE Office of Fossil Energy (FE)
- Country of Publication:
- United States
- Intermetallic; High-entropy alloy; neutron scattering; microscopy; 36 MATERIALS SCIENCE; high entropy alloys; physical sciences; materials science
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