Composition-dependent apparent activation-energy and sluggish grain-growth in high entropy alloys

B. Gwalani; R. Salloom; T. Alam; S. G. Valentin; X. Zhou; G. Thompson; S. G. Srinivasan; R. Banerjee

doi:10.1080/21663831.2019.1601644

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Composition-dependent apparent activation-energy and sluggish grain-growth in high entropy alloys

Original Report | 更新时间：2026-08-19

- Composition-dependent apparent activation-energy and sluggish grain-growth in high entropy alloys
- Materials Research Letters Vol. 7, Issue 7, Pages: 267-274(2019)
- 作者机构：
  
  1. Advanced Materials and Manufacturing Processes Institute University of North Texas Denton TX USA
  2. Present address: Physical and Computational Sciences Directorate Pacific Northwest National Laboratory Battelle Blvd Richland,902
  3. Department of Materials Science and Engineering University of North Texas Denton
  4. Department of Metallurgical and Materials Engineering The University of Alabama Tuscaloosa
  5. Department of Materials Science and Engineering University of North Texas Denton TX USA
  6. Advanced Materials and Manufacturing Processes Institute University of North Texas Denton
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2019.1601644
  CLC：
- Online First：10 April 2019，
  
  Published：2019
- 稿件说明：
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B. Gwalani, R. Salloom, T. Alam, et al. Composition-dependent apparent activation-energy and sluggish grain-growth in high entropy alloys[J]. Materials Research Letters, 2019, 7(7): 267-274.
DOI：

B. Gwalani, R. Salloom, T. Alam, et al. Composition-dependent apparent activation-energy and sluggish grain-growth in high entropy alloys[J]. Materials Research Letters, 2019, 7(7): 267-274. DOI： 10.1080/21663831.2019.1601644.

摘要

Abstract

BSTRACTExperimental results reveal that the apparent activation-energy for grain-growth in an

fcc-

based Al

CoCrFeNi high entropy alloy (HEA) system increases from 179 to 486 kJ/mol when the Al content increases from

= 0.1 to 0.3. These unexpectedly high apparent activation-energy values can be potentially attributed to solute clustering within the

fcc

solid-solution phase that develops with increasing Al content in this HEA. Detailed microstructural analysis using atom-probe tomography and density functional theory (DFT) calculations strongly indicate the presence of such nanoscale clusters. This phenomenon can change grain-growth from a classical solute-drag regime to a much more sluggish cluster-drag based mechanism in these HEAs.

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