Novel Co-rich high entropy alloys with superior tensile properties

Daixiu Wei; Xiaoqing Li; Weicheng Heng; Yuichiro Koizumi; Feng He; Won-Mi Choi; Byeong-Joo Lee; Hyoung Seop Kim; Hidemi Kato; Akihiko Chiba

doi:10.1080/21663831.2018.1553803

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Novel Co-rich high entropy alloys with superior tensile properties

Original Report | 更新时间：2026-08-19

- Novel Co-rich high entropy alloys with superior tensile properties
- Materials Research Letters Vol. 7, Issue 2, Pages: 82-88(2019)
- 作者机构：
  
  1. Department of Materials Science and Engineering Massachusetts Institute of Technology
  2. Department of Materials Science and Engineering
  3. Institute for Materials Research Tohoku University Sendai Japan
  4. Department of Materials Processing Tohoku University
  5. Institute for Materials Research Tohoku University
  6. Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge USA
  7. State Key Laboratory of Solidification Processing Northwestern Polytechnical University
  8. Department of Materials Science and Engineering Pohan University of Science and Technology (POSTEC)
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2018.1553803
  CLC：
- Online First：17 December 2018，
  
  Published：2019
- 稿件说明：
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Daixiu Wei, Xiaoqing Li, Weicheng Heng, et al. Novel Co-rich high entropy alloys with superior tensile properties[J]. Materials Research Letters, 2019, 7(2): 82-88.
DOI：

Daixiu Wei, Xiaoqing Li, Weicheng Heng, et al. Novel Co-rich high entropy alloys with superior tensile properties[J]. Materials Research Letters, 2019, 7(2): 82-88. DOI： 10.1080/21663831.2018.1553803.

摘要

Abstract

BSTRACTWe developed a series of Co-rich Co

(FeNi)

75−x

(

= 35

65) high entropy alloys with improved strength and/or ductility

derived from lowering the stacking fault energy (SFE) and reducing the fcc phase stability of the equiatomic CoCrFeNi alloy. Thermodynamics and

ab initio

calculations demonstrated that increasing Co while decreasing Fe and Ni concentrations lower the SFE and reduce the fcc phase stability. The Co

and Co

alloys with single fcc phase

exhibit superior tensile properties

contributing to the twinning and fcc → hcp martensitic transformation. The present study offers a guideline for designing high-performance high entropy alloys.

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