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Title: A promising new class of high-temperature alloys : Eutectic high-entropy alloys
Authors: Lu, YP
Dong, Y
Guo, S
Jiang, L
Kang, HJ
Wang, TM
Wen, B
Wang, ZJ
Jie, JC
Cao, ZQ
Ruan, HH 
Li, TJ
Issue Date: 2014
Source: Scientific reports, 27 2014, v. 4, no. , p. 1-5
Abstract: High-entropy alloys (HEAs) can have either high strength or high ductility, and a simultaneous achievement of both still constitutes a tough challenge. The inferior castability and compositional segregation of HEAs are also obstacles for their technological applications. To tackle these problems, here we proposed a novel strategy to design HEAs using the eutectic alloy concept, i.e. to achieve a microstructure composed of alternating soft fcc and hard bcc phases. As a manifestation of this concept, an AlCoCrFeNi2.1 (atomic portion) eutectic high-entropy alloy (EHEA) was designed. The as-cast EHEA possessed a fine lamellar fcc/B2 microstructure, and showed an unprecedented combination of high tensile ductility and high fracture strength at room temperature. The excellent mechanical properties could be kept up to 700 degrees C. This new alloy design strategy can be readily adapted to large-scale industrial production of HEAs with simultaneous high fracture strength and high ductility.
Publisher: Nature Publishing Group
Journal: Scientific reports 
EISSN: 2045-2322
DOI: 10.1038/srep06200
Rights: This work is licensed under a Creative Commons Attribution-NonCommercial NoDerivs 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://
The following publication Lu, Y., Dong, Y., Guo, S. et al. A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys. Sci Rep 4, 6200 (2015) is available at
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