Ordering-mediated local nano-clustering results in unusually large Hall-Petch strengthening coefficients in high entropy alloys

A. Jagetia; M.S.K.K.Y. Nartu; S. Dasari; A. Sharma; B. Gwalani; R. Banerjee

doi:10.1080/21663831.2020.1871440

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Ordering-mediated local nano-clustering results in unusually large Hall-Petch strengthening coefficients in high entropy alloys

Original Reports | 更新时间：2026-08-19

- Ordering-mediated local nano-clustering results in unusually large Hall-Petch strengthening coefficients in high entropy alloys
- Materials Research Letters Vol. 9, Issue 5, Pages: 213-222(2021)
- 作者机构：
  
  1. a Department of Materials Science and Engineering University of North Texas Denton
  2. a Department of Materials Science and Engineering University of North Texas Denton TX USA
  3. b Currently at Physical and Computational Sciences Directorate Pacific Northwest National Laboratory Richland
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2020.1871440
  CLC：
- Online First：23 January 2021，
  
  Published：2021
- 稿件说明：
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A. Jagetia, M.S.K.K.Y. Nartu, S. Dasari, et al. Ordering-mediated local nano-clustering results in unusually large Hall-Petch strengthening coefficients in high entropy alloys[J]. Materials Research Letters, 2021, 9(5): 213-222.
DOI：

A. Jagetia, M.S.K.K.Y. Nartu, S. Dasari, et al. Ordering-mediated local nano-clustering results in unusually large Hall-Petch strengthening coefficients in high entropy alloys[J]. Materials Research Letters, 2021, 9(5): 213-222. DOI： 10.1080/21663831.2020.1871440.

摘要

Abstract

This paper reports a dramatic increase in the grain boundary strengthening or Hall-Petch coefficient

by systematically investigating the effect of Al addition on tensile yield strength in CoFeNi and CoCrFeNi high entropy alloys (HEAs) or complex concentrated alloys (CCAs). Additionally

detailed atom probe tomography (APT) revealed a high number density of Ni-Al rich nano-clusters in the Al

0.3

CoFeNi and Al

0.3

CoCrFeNi HEAs/CCAs

which can be rationalized based on the strong chemical ordering tendency between these elements. Consequently

the huge increase in K value can be attributed to the additional stress required for overcoming coherency strain fields arising from these nano-clusters.

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Related Author

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Related Institution

b CNRS Univ. Bordeaux Bordeaux INP ICMCB UMR

c Collaborative Innovation Center Northwestern Polytechnical University

b Research & Development Institute Northwestern Polytechnical University in Shenzhen Shenzhen People’s Republic of China

a State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi’an People’s Republic of China

a State Key Laboratory of Solidification Processing Northwestern Polytechnical University

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