A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys

By Yiping Lu, Yong Dong, Sheng Guo, Li Jiang, Huijun Kang, Tongmin Wang, B. Wen, Zhijun Wang, J. Jie, Z. Cao and 2 more. Scientific Reports, 2014

1,556 citations recorded by the source corpus.

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°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.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/bf611560425bc8fb40a72a06d8e2e3245523de7d

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The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Aerospace Engineering

  1. Daniel B. Miracle
  2. Oleg N. Senkov
  3. Jien‐Wei Yeh
  4. Sheng Guo
  5. Yiping Lu
  6. P. K. Liaw
  7. P. Alvaredo
  8. A. García-Junceda

In Mechanical Engineering

  1. Daniel B. Miracle
  2. Oleg N. Senkov
  3. Jien‐Wei Yeh
  4. Sheng Guo
  5. Xiaolei Wu
  6. Evan Ma
  7. Yuntian Zhu
  8. Yiping Lu

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