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Title: High-entropy alloys

Journal Article · · Nature Reviews. Materials
ORCiD logo [1];  [2]; ORCiD logo [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Max-Planck-Institut für Eisenforschung, Düsseldorf (Germany)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)

We present that alloying has long been used to confer desirable properties to materials. Typically, it involves the addition of relatively small amounts of secondary elements to a primary element. For the past decade and a half, however, a new alloying strategy that involves the combination of multiple principal elements in high concentrations to create new materials called high-entropy alloys has been in vogue. The multi-dimensional compositional space that can be tackled with this approach is practically limitless, and only tiny regions have been investigated so far. Nevertheless, a few high-entropy alloys have already been shown to possess exceptional properties, exceeding those of conventional alloys, and other outstanding high-entropy alloys are likely to be discovered in the future. In this paper, we review recent progress in understanding the salient features of high-entropy alloys. Model alloys whose behaviour has been carefully investigated are highlighted and their fundamental properties and underlying elementary mechanisms discussed. Finally, we also address the vast compositional space that remains to be explored and outline fruitful ways to identify regions within this space where high-entropy alloys with potentially interesting properties may be lurking.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1550755
Journal Information:
Nature Reviews. Materials, Vol. 4, Issue 8; ISSN 2058-8437
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1528 works
Citation information provided by
Web of Science

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High-Entropy Alloys: Potential Candidates for High-Temperature Applications - An Overview journal October 2017
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Effect of microalloying with silicon on high temperature oxidation resistance of novel refractory high-entropy alloy Ta-Mo-Cr-Ti-Al journal October 2017
Strong grain-size effect on deformation twinning of an Al 0.1 CoCrFeNi high-entropy alloy journal November 2016
Microstructures and properties of high-entropy alloy films and coatings: a review journal February 2018
Effect of medium temperature precipitation phase and Mn element diffusion mechanism on high temperature oxidation process of repair and remanufacture CoCrFeMnNi high-entropy alloy cladding journal February 2019
Structural and thermal properties of nanocrystalline Al x (SiFeCoNi) 100-x medium entropy alloys journal August 2019
Outstanding radiation resistance of tungsten-based high-entropy alloys journal March 2019
Stepanov High-entropy AlCoFeCrVNi and AlCoFeCrVTi alloys obtained by mechanical alloying and subsequent sintering [Високоентропійні AlCoFeCrVNi та AlCoFeCrVTi сплави, отримані механічним легуванням і наступним спіканням] journal December 2018
Mechanical properties of AlCoFeCrVNi and AlCoFeCrVTi high-entropy alloys obtained by sintering under pressure [Механічні властивості високоентропійних AlCoFeCrVNi та AlCoFeCrVTi сплавів після спікання під тиском] journal December 2019
Current and emerging practices of CALPHAD toward the development of high entropy alloys and complex concentrated alloys journal June 2018
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Wear behavior of Al 0.6 CoCrFeNi high-entropy alloys: Effect of environments journal September 2018
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First report on cold-sprayed AlCoCrFeNi high-entropy alloy and its isothermal oxidation journal March 2019
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Enhancing the mechanical properties of casting eutectic high entropy alloys with Mo addition journal February 2019
Preparation of nanocrystalline high-entropy alloys via cryomilling of cast ingots journal May 2018
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Pseudo-binary and pseudo-ternary diffusion couple methods for estimation of the diffusion coefficients in multicomponent systems and high entropy alloys journal May 2019
Multicomponent equiatomic rare earth oxides journal August 2016
Superplastic-like flow in a fine-grained equiatomic CoCrFeMnNi high-entropy alloy journal March 2017
Effect of cobalt content on wear behaviour of Al 0.4 FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) high entropy alloys tested under demineralised water with and without 3.5% NaCl solution journal May 2019
Computational characterization of the structural and mechanical properties of Al x CoCrFeNiTi 1− x high entropy alloys journal July 2019
Microstructure characterization of AlCoCrFeNiTi high-entropy alloy coating produced by atmospheric plasma spraying journal September 2019
Phase evolution and thermal stability of mechanically alloyed CoCrCuFeNi high entropy alloy journal December 2019
Unveiling the mechanism of abnormal magnetic behavior of FeNiCoMnCu high-entropy alloys through a joint experimental-theoretical study journal January 2020
High‐entropy, phase‐constrained, lanthanide sesquioxide journal July 2019
High‐entropy transparent fluoride laser ceramics journal September 2019
High-entropy AlCoNiFeCrTiVx coatings куігдеув акщь electron-beam cladding [Високоентропійні AlCоNiFeCrTiVx покриття, отримані електронно-променевим наплавленням] journal July 2019
Nanomechanical studies of high-entropy alloys journal June 2018
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A Short Review on Welding and Joining of High Entropy Alloys journal February 2020
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The scandium effect in multicomponent alloys text January 2016
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Additive Manufacturing of Advanced Multi-Component Alloys: Bulk Metallic Glasses and High Entropy Alloys journal December 2017
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Plasma-Sprayed High Entropy Alloys: Microstructure and Properties of AlCoCrFeNi and MnCoCrFeNi journal November 2014
Nano-/Ultrafine Eutectic in CoCrFeNi(Nb/Ta) High-Entropy Alloys journal September 2018
Accelerated exploration of multi-principal element alloys with solid solution phases journal March 2015
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The scandium effect in multicomponent alloys journal April 2016
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Breakthrough applications of high-entropy materials journal August 2018
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High-Entropy Oxides: Fundamental Aspects and Electrochemical Properties text January 2019
High-entropy alloys fabricated via powder metallurgy. A critical review text January 2019
Glass theory: ground and excited states of coupled electron pairs preprint January 2020

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