Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/36264
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
Publisher: Nature Publishing Group
Source: Scientific reports, 2014, v. 4, 6200 How to cite?
Journal: Scientific reports 
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.
URI: http://hdl.handle.net/10397/36264
EISSN: 2045-2322
DOI: 10.1038/srep06200
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