Development and exploration of refractory high entropy alloys—A review

Open literature publications, in the period from 2010 to the end of January 2018, on refractory high entropy alloys (RHEAs) and refractory complex concentrated alloys (RCCAs) are reviewed. While RHEAs, by original definition, are alloys consisting of five or more principal elements with the concentr...

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Bibliographic Details
Published in:Journal of materials research Vol. 33; no. 19; pp. 3092 - 3128
Main Authors: Senkov, Oleg N., Miracle, Daniel B., Chaput, Kevin J., Couzinie, Jean-Philippe
Format: Journal Article
Language:English
Published: New York, USA Cambridge University Press 14.10.2018
Springer International Publishing
Springer Nature B.V
Subjects:
Alloy development
Alloys
Applied and Technical Physics
Biomaterials
Crystal structure
Deformation mechanisms
Ductility
Entropy
Exploration
High entropy alloys
High temperature
Inorganic Chemistry
Invited Review
Literature reviews
Materials Engineering
Materials research
Materials Science
Mechanical properties
Microstructure
Nanotechnology
Nickel base alloys
Oxidation
R&D
Refractory alloys
Research & development
Superalloys
Taxonomy
Tribology
United States > US
overview
refractory alloys
microstructure
properties
high entropy alloys
ISSN:0884-2914, 2044-5326
Online Access:Get full text
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Summary:Open literature publications, in the period from 2010 to the end of January 2018, on refractory high entropy alloys (RHEAs) and refractory complex concentrated alloys (RCCAs) are reviewed. While RHEAs, by original definition, are alloys consisting of five or more principal elements with the concentration of each of these elements between 5 and 35 at.%, RCCAs can contain three or more principal elements and the element concentration can be greater than 35%. The 151 reported RHEAs/RCCAs are analyzed based on their composition, processing methods, microstructures, and phases. Mechanical properties, strengthening and deformation mechanisms, oxidation, and corrosion behavior, as well as tribology, of RHEA/RCCAs are summarized. Unique properties of some of these alloys make them promising candidates for high temperature applications beyond Ni-based superalloys and/or conventional refractory alloys. Methods of development and exploration, future directions of research and development, and potential applications of RHEAs are discussed.
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ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2018.153