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

Abstract

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 Al 1.3CoCrCuFeNi 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.

Authors:
 [1];  [2];  [3];  [3];  [4];  [5];  [3];  [6];  [6]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. National Energy Technology Lab., Albany, OR (United States); URS Corporation, Albany, OR (United States)
  5. Materials Development Inc., Evanston, IL (United States); Argonne National Lab., Argonne, IL (United States)
  6. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Univ. of Tennessee, Knoxville, TN (United States); Univ. of Illinois Urbana-Champaign, Champaign, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE); Work for Others (WFO)
OSTI Identifier:
1224520
Alternate Identifier(s):
OSTI ID: 1185345
Grant/Contract Number:  
FE0011194; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; high entropy alloys; physical sciences; materials science; Intermetallic; High-entropy alloy; neutron scattering; microscopy

Citation Formats

Santodonato, Louis J., Zhang, Yang, Feygenson, Mikhail, Parish, Chad M., Gao, Michael C., Weber, Richard J. K., Neuefeind, Joerg C., Tang, Zhi, and Liaw, Peter K. Deviation from high-entropy configurations in the atomic distributions of a multi-principal-element alloy. United States: N. p., 2015. Web. doi:10.1038/ncomms6964.
Santodonato, Louis J., Zhang, Yang, Feygenson, Mikhail, Parish, Chad M., Gao, Michael C., Weber, Richard J. K., Neuefeind, Joerg C., Tang, Zhi, & Liaw, Peter K. Deviation from high-entropy configurations in the atomic distributions of a multi-principal-element alloy. United States. doi:10.1038/ncomms6964.
Santodonato, Louis J., Zhang, Yang, Feygenson, Mikhail, Parish, Chad M., Gao, Michael C., Weber, Richard J. K., Neuefeind, Joerg C., Tang, Zhi, and Liaw, Peter K. Tue . "Deviation from high-entropy configurations in the atomic distributions of a multi-principal-element alloy". United States. doi:10.1038/ncomms6964. https://www.osti.gov/servlets/purl/1224520.
@article{osti_1224520,
title = {Deviation from high-entropy configurations in the atomic distributions of a multi-principal-element alloy},
author = {Santodonato, Louis J. and Zhang, Yang and Feygenson, Mikhail and Parish, Chad M. and Gao, Michael C. and Weber, Richard J. K. and Neuefeind, Joerg C. and Tang, Zhi and Liaw, Peter K.},
abstractNote = {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.},
doi = {10.1038/ncomms6964},
journal = {Nature Communications},
number = ,
volume = 6,
place = {United States},
year = {2015},
month = {1}
}

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    Tuning phase stability and short-range order through Al doping in ( CoCrFeMn ) 100 − x A l x high-entropy alloys
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