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High-entropy alloys

Journal Article · · Nature Reviews. Materials
 [1];  [2];  [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, Journal Name: Nature Reviews. Materials Journal Issue: 8 Vol. 4; ISSN 2058-8437
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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conference January 2016
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Origin of high strength in the CoCrFeNiPd high-entropy alloy dataset January 2020
Influence of Ti on the Tensile Properties of the High-Strength Powder Metallurgy High Entropy Alloys journal January 2020
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High-Entropy Alloys: Potential Candidates for High-Temperature Applications - An Overview journal October 2017
Additive Manufacturing of Advanced Multi-Component Alloys: Bulk Metallic Glasses and High Entropy Alloys journal December 2017
Composition Dependence on the Evolution of Nanoeutectic in CoCrFeNiNb x (0.45 ≤  x  ≤ 0.65) High Entropy Alloys journal December 2017
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Additive Manufacturing of High-Entropy Alloys by Laser Processing journal April 2016
Thermal Expansion, Elastic and Magnetic Properties of FeCoNiCu-Based High-Entropy Alloys Using First-Principle Theory journal August 2017
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Nano-/Ultrafine Eutectic in CoCrFeNi(Nb/Ta) High-Entropy Alloys journal September 2018
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Microstructure and Mechanical Properties of NiTiCuFe Multi-component Alloy journal September 2018
Polymorphism and superconductivity in the V-Nb-Mo-Al-Ga high-entropy alloys journal January 2020
High Strain Rate Response of Al0.7CoCrFeNi High Entropy Alloy: Dynamic Strength Over 2 GPa from Thermomechanical Processing and Hierarchical Microstructure journal December 2018
Accelerated exploration of multi-principal element alloys with solid solution phases journal March 2015
High entropy oxides for reversible energy storage journal August 2018
High-entropy high-hardness metal carbides discovered by entropy descriptors journal November 2018
Electrosynthesis of high-entropy metallic glass nanoparticles for designer, multi-functional electrocatalysis journal June 2019
Tailoring heterogeneities in high-entropy alloys to promote strength–ductility synergy journal December 2019
Atomic and electronic basis for the serrations of refractory high-entropy alloys journal June 2017
Phonon broadening in high entropy alloys journal September 2017
Impact of lattice relaxations on phase transitions in a high-entropy alloy studied by machine-learning potentials journal May 2019
High-entropy ceramics journal February 2020
Computationally-driven engineering of sublattice ordering in a hexagonal AlHfScTiZr high entropy alloy journal May 2017
Ti2NiCoSnSb - a new half-Heusler type high-entropy alloy showing simultaneous increase in Seebeck coefficient and electrical conductivity for thermoelectric applications journal March 2019
A high-entropy B 4 (HfMo 2 TaTi)C and SiC ceramic composite journal January 2019
Reactive nanotemplates for synthesis of highly efficient electrocatalysts: beyond simple morphology transfer journal January 2019
An as-cast high-entropy alloy with remarkable mechanical properties strengthened by nanometer precipitates journal January 2020
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“Treasure maps” for magnetic high-entropy-alloys from theory and experiment journal October 2015
Rare-earth high entropy alloys with hexagonal close-packed structure journal November 2018
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Sintering mechanism of CoCrFeMnNi high-entropy alloy powders journal February 2018
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Comparison of the structure and properties of equiatomic and non-equiatomic multicomponent alloys journal January 2018
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Synthesis of a single phase of high-entropy Laves intermetallics in the Ti–Zr–V–Cr–Ni equiatomic alloy journal December 2017
The scandium effect in multicomponent alloys journal April 2016
High-entropy alloys: a critical assessment of their founding principles and future prospects journal April 2016
Effect of microalloying with silicon on high temperature oxidation resistance of novel refractory high-entropy alloy Ta-Mo-Cr-Ti-Al journal October 2017
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
Strong grain-size effect on deformation twinning of an Al 0.1 CoCrFeNi high-entropy alloy journal November 2016
Superplastic-like flow in a fine-grained equiatomic CoCrFeMnNi high-entropy alloy journal March 2017
Microstructures and properties of high-entropy alloy films and coatings: a review journal February 2018
Structure and properties of lightweight high entropy alloys: a brief review journal May 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
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
Structural and thermal properties of nanocrystalline Al x (SiFeCoNi) 100-x medium entropy alloys journal August 2019
Microstructure characterization of AlCoCrFeNiTi high-entropy alloy coating produced by atmospheric plasma spraying journal September 2019
Microstructure and elastic constants of AlTiVMoNb refractory high-entropy alloy coating on Ti6Al4V by laser cladding journal September 2019
A possibility of Pd based high entropy alloy for hydrogen gas sensing applications journal September 2019
Phase evolution and thermal stability of mechanically alloyed CoCrCuFeNi high entropy alloy journal December 2019
Tuning phase stability and short-range order through Al doping in ( CoCrFeMn ) 100 − x A l x high-entropy alloys journal July 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
Outstanding radiation resistance of tungsten-based high-entropy alloys journal March 2019
Critical Assessment 14: High entropy alloys and their development as structural materials journal January 2015
Phase selection rules for cast high entropy alloys: an overview journal February 2015
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
High-entropy AlCoNiFeCrTiVx coatings куігдеув акщь electron-beam cladding [Високоентропійні AlCоNiFeCrTiVx покриття, отримані електронно-променевим наплавленням] journal July 2019
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
Nanomechanical behavior and structural stability of a nanocrystalline CoCrFeNiMn high-entropy alloy processed by high-pressure torsion journal August 2015
Current and emerging practices of CALPHAD toward the development of high entropy alloys and complex concentrated alloys journal June 2018
Nanomechanical studies of high-entropy alloys journal June 2018
Effect of Ti substitution for Al on the cuboidal nanoprecipitates in Al 0.7 NiCoFeCr 2 high-entropy alloys journal August 2018
Modeling the structure and thermodynamics of high-entropy alloys journal July 2018
Model interatomic potentials and lattice strain in a high-entropy alloy journal August 2018
Wear behavior of Al 0.6 CoCrFeNi high-entropy alloys: Effect of environments journal September 2018
Size effects on plasticity in high-entropy alloys journal August 2018
Breakthrough applications of high-entropy materials journal August 2018
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The Poly-Substituted M-Type Hexaferrite Crystals Growth journal February 2019
High entropy oxides for reversible energy storage text January 2018
High-Entropy Oxides: Fundamental Aspects and Electrochemical Properties text January 2019
Critical evaluation of glass forming ability criteria text January 2016
The scandium effect in multicomponent alloys text January 2016
Multicomponent equiatomic rare earth oxides text January 2016
High-entropy alloys fabricated via powder metallurgy. A critical review text January 2019
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