Ductilizing brittle high-entropy alloys via tailoring valence electron concentrations of precipitates by controlled elemental partitioning

T. Yang; Y. L. Zhao; W. H. Liu; J. H. Zhu; J. J. Kai; C. T. Liu

doi:10.1080/21663831.2018.1518276

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Ductilizing brittle high-entropy alloys via tailoring valence electron concentrations of precipitates by controlled elemental partitioning

Original Report | 更新时间：2026-08-19

- Ductilizing brittle high-entropy alloys via tailoring valence electron concentrations of precipitates by controlled elemental partitioning
- Ductilizing brittle high-entropy alloys via tailoring valence electron concentrations of precipitates by controlled elemental partitioning
- 材料研究快报（英文） 2018年6卷第10期页码：600-606
- 作者机构：
  
  1. Department of Mechanical and Biomedical Engineering City University of Hong Kong
  2. Department of Material Science and Engineering Xiamen University
  3. Department of Mechanical and Biomedical Engineering City University of Hong Kong Hong Kong People's Republic of China
  4. Center for Advanced Nuclear Safety and Sustainable Development City University of Hong Kong
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2018.1518276
  中图分类号：
- 网络首发：2018-09-07，
  
  纸质出版：2018
- 稿件说明：
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T. Yang, Y. L. Zhao, W. H. Liu, 等. Ductilizing brittle high-entropy alloys via tailoring valence electron concentrations of precipitates by controlled elemental partitioning[J]. 材料研究快报（英文）, 2018,6(10):600-606.

T. Yang, Y. L. Zhao, W. H. Liu, et al. Ductilizing brittle high-entropy alloys via tailoring valence electron concentrations of precipitates by controlled elemental partitioning[J]. Materials Research Letters, 2018, 6(10): 600-606.
T. Yang, Y. L. Zhao, W. H. Liu, 等. Ductilizing brittle high-entropy alloys via tailoring valence electron concentrations of precipitates by controlled elemental partitioning[J]. 材料研究快报（英文）, 2018,6(10):600-606. DOI： 10.1080/21663831.2018.1518276.

T. Yang, Y. L. Zhao, W. H. Liu, et al. Ductilizing brittle high-entropy alloys via tailoring valence electron concentrations of precipitates by controlled elemental partitioning[J]. Materials Research Letters, 2018, 6(10): 600-606. DOI： 10.1080/21663831.2018.1518276.

摘要

Abstract

BSTRACTHigh-strength high-entropy alloys (HEAs) reinforced by hard intermetallics generally show a propensity for embrittlement

significantly undercutting their applications. Here we report a strategy to intrinsically toughen strong-yet-brittle HEAs via altering the valence electron concentration (VEC) of precipitates. It was found that a decrease of the VEC of precipitates by Co substitution for Ni atoms effectively destabilizes the brittle hexagonal-ordered precipitate and promotes the formation of ductile cubic-ordered nano-precipitates in Ni–Co–Fe–Cr–Ti system. Benefiting from such a transformation

a fivefold enhancement of tensile elongation (from 7% to 35%) was successfully achieved together with a simultaneously improved strength up to ∼1.35 GPa.

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相关机构

1 Graduate Institute of Ferrous & Eco Materials Technology Pohang University of Science and Technology (POSTECH)

2 Department of Materials Science and Engineering Pohang University of Science and Technology (POSTECH)

1 Graduate Institute of Ferrous & Eco Materials Technology Pohang University of Science and Technology (POSTECH) Pohang Republic of Korea

Department of Materials Science and Engineering Pohang University of Science and Technology (POSTECH) Pohang Republic of Korea

Center for Heterogenic Metal Additive Manufacturing Pohang University of Science and Technology (POSTECH) Pohang Republic of Korea

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