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

Authors:
; ; ; ; ; ; ; ;  [1];  [2];  [2];  [2];  [2]
  1. (Tennessee-K)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
DOE - BASIC ENERGY SCIENCESNSF
OSTI Identifier:
1169357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nat. Commun.; Journal Volume: 6; Journal Issue: 01, 2015
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

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., ORNL), Materials Dev.), NETL), and UIUC). Deviation from high-entropy configurations in the atomic distributions of a multi-principal-element alloy. United States: N. p., 2016. 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., ORNL), Materials Dev.), NETL), & UIUC). 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, Liaw, Peter K., ORNL), Materials Dev.), NETL), and UIUC). 2016. "Deviation from high-entropy configurations in the atomic distributions of a multi-principal-element alloy". United States. doi:10.1038/ncomms6964.
@article{osti_1169357,
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. and ORNL) and Materials Dev.) and NETL) and UIUC)},
abstractNote = {},
doi = {10.1038/ncomms6964},
journal = {Nat. Commun.},
number = 01, 2015,
volume = 6,
place = {United States},
year = 2016,
month = 6
}
  • 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 rangemore » of complex materials, and should not be limited to the goal of creating single-phase solid solutions.« less
  • 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 Al1.3CoCr-CuFeNi 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 complexmore » materials, and should not be limited to the goal of creating single-phase solid solutions.« less
  • Deformation behavior of a high-entropy alloy (HEA) was investigated by in situ tensile deformation with neutron diffraction. It was found that the face-centered cubic (FCC) HEA alloy showed strong crystal elastic and plastic anisotropy, and the evolution of its lattice strains and textures were similar to those observed in conventional FCC metals and alloys. Our results demonstrated that, in spite of chemical complexity, the multi-component HEA behaved like a simple FCC metal and the deformation was caused by the motion of mixed dislocations.
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