Superior strength-ductility synergy of an oxide-dispersion strengthened CoCrNi-based multi-principal element alloy

Yiqing Zhang; Kaiju Lu; Fengchun Jiang; Yongxiong Chen; Xiubing Liang

doi:10.1080/21663831.2024.2393166

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Superior strength-ductility synergy of an oxide-dispersion strengthened CoCrNi-based multi-principal element alloy

Original Report | 更新时间：2026-08-19

- Superior strength-ductility synergy of an oxide-dispersion strengthened CoCrNi-based multi-principal element alloy
- Superior strength-ductility synergy of an oxide-dispersion strengthened CoCrNi-based multi-principal element alloy
- 材料研究快报（英文） 2024年12卷第11期页码：825-833
- 作者机构：
  
  1. a Yantai Research Institute Harbin Engineering University Yantai People's Republic of China
  2. b Defense Innovation Institute Academy of Military Science
  3. a Yantai Research Institute Harbin Engineering University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2024.2393166
  中图分类号：
- 网络首发：2024-08-22，
  
  纸质出版：2024
- 稿件说明：
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Yiqing Zhang, Kaiju Lu, Fengchun Jiang, 等. Superior strength-ductility synergy of an oxide-dispersion strengthened CoCrNi-based multi-principal element alloy[J]. 材料研究快报（英文）, 2024,12(11):825-833.

Yiqing Zhang, Kaiju Lu, Fengchun Jiang, et al. Superior strength-ductility synergy of an oxide-dispersion strengthened CoCrNi-based multi-principal element alloy[J]. Materials Research Letters, 2024, 12(11): 825-833.
Yiqing Zhang, Kaiju Lu, Fengchun Jiang, 等. Superior strength-ductility synergy of an oxide-dispersion strengthened CoCrNi-based multi-principal element alloy[J]. 材料研究快报（英文）, 2024,12(11):825-833. DOI： 10.1080/21663831.2024.2393166.

Yiqing Zhang, Kaiju Lu, Fengchun Jiang, et al. Superior strength-ductility synergy of an oxide-dispersion strengthened CoCrNi-based multi-principal element alloy[J]. Materials Research Letters, 2024, 12(11): 825-833. DOI： 10.1080/21663831.2024.2393166.

摘要

Abstract

CoCrNi-based multi-principal element alloys (MPEAs) often lack strength at elevated temperatures. Here

to overcome this deficiency

a novel oxide-dispersion strengthening (ODS) CoCrNi-based MPEA was designed by incorporating nano-scale yttria via LPBF. The ODS MPEA possesses superior strength-ductility synergy at both ambient and elevated temperatures to most reported CoCrNi-based MPEAs and state-of-the-art superalloys. TEM investigations revealed dislocation forest and slip traces in the interior of solidification dislocation cell structure

along with extended stacking faults and nano-twins. These features contributed to the excellent strength-ductility of the MPEA. Lastly

quantitative analyses uncovered the contributions of operating strengthening mechanisms to its high strength.

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相关机构

d Department of Mechanical Engineering City University of Hong Kong

c Department of Materials Science and Engineering University of Hong Kong Hong Kong People's Republic of China

b Center for Advancing Materials Performance from the Nanoscale State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University

a China Nuclear Power Technology Research Institute

e Advanced Materials Research Central Northwest Institute for Nonferrous Metal Research

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