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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 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 complex materials, and should not be limited to the goal of creating single-phase solid solutions.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF)
OSTI Identifier:
1390843
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nature Communications; Journal Volume: 6
Country of Publication:
United States
Language:
English
Subject:
Levitation, diffraction

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.
@article{osti_1390843,
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 Al1.3CoCr-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 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 = {Tue Jan 20 00:00:00 EST 2015},
month = {Tue Jan 20 00:00:00 EST 2015}
}