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Title: Nanoprecipitates to Enhance Radiation Tolerance in High-Entropy Alloys

Abstract

The growth of advanced energy technologies for power generation is enabled by the design, development, and integration of structural materials that can withstand extreme environments, such as high temperatures, radiation damage, and corrosion. High-entropy alloys (HEAs) are a class of structural materials in which suitable chemical elements in four or more numbers are mixed to typically produce single-phase concentrated solid solution alloys (CSAs). Many of these alloys exhibit good radiation tolerance like limited void swelling and hardening up to relatively medium radiation doses (tens of displacements per atom (dpa)); however, at higher radiation damage levels (>50 dpa), some HEAs suffer from considerable void swelling limiting their near-term acceptance for advanced nuclear reactor concepts. In this study, we developed a HEA containing a high density of Cu-rich nanoprecipitates distributed in the HEA matrix. The Cu-added HEA, NiCoFeCrCu0.12, shows excellent void swelling resistance and negligible radiation-induced hardening upon irradiation up to high radiation doses (i.e., higher than 100 dpa). The void swelling resistance of the alloy is measured to be significantly better than NiCoFeCr CSA and austenitic stainless steels. Density functional theory simulations predict lower vacancy and interstitial formation energies at the coherent interfaces between Cu-rich nanoprecipitates and the HEA matrix. Themore » alloy maintained a high sink strength achieved via nanoprecipitates and the coherent interface with the matrix at a high radiation dose (~50 dpa). From our experiments and simulations, the effective recombination of radiation-produced vacancies and interstitials at the coherent interfaces of the nanoprecipitates is suggested to be the critical mechanism responsible for the radiation tolerance of the alloy. Furthermore, the materials design strategy based on incorporating a high density of interfaces can be applied to high-entropy alloy systems to improve their radiation tolerance.« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [2];  [3]; ORCiD logo [2]; ORCiD logo [4]; ORCiD logo [5];  [6]; ORCiD logo [7]; ORCiD logo [8]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Idaho National Laboratory (INL), Idaho Falls, ID (United States)
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  3. University of Wyoming, Laramie, WY (United States)
  4. Idaho National Laboratory (INL), Idaho Falls, ID (United States)
  5. Zhejiang University, Hangzhou (China)
  6. Clemson University, SC (United States)
  7. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Manchester (United Kindom)
  8. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Tennessee, Knoxville, TN (United States); Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1997671
Alternate Identifier(s):
OSTI ID: 1957550
Report Number(s):
INL/JOU-22-69371-Rev000
Journal ID: ISSN 1944-8244
Grant/Contract Number:  
AC05-00OR22725; AC07-05ID14517; AC07-05ID145142
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 15; Journal Issue: 3; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; high-entropy alloys; nanoprecipitates; radiation; swelling; hardening; transmission electron microscopy; atom probe tomography; density functional theory

Citation Formats

Kombaiah, Boopathy, Zhou, Yufan, Jin, Ke, Manzoor, Anus, Poplawsky, Jonathan D., Aguiar, Jeffery A., Bei, Hongbin, Aidhy, Dilpuneet S., Edmondson, Philip D., and Zhang, Yanwen. Nanoprecipitates to Enhance Radiation Tolerance in High-Entropy Alloys. United States: N. p., 2023. Web. doi:10.1021/acsami.2c17540.
Kombaiah, Boopathy, Zhou, Yufan, Jin, Ke, Manzoor, Anus, Poplawsky, Jonathan D., Aguiar, Jeffery A., Bei, Hongbin, Aidhy, Dilpuneet S., Edmondson, Philip D., & Zhang, Yanwen. Nanoprecipitates to Enhance Radiation Tolerance in High-Entropy Alloys. United States. https://doi.org/10.1021/acsami.2c17540
Kombaiah, Boopathy, Zhou, Yufan, Jin, Ke, Manzoor, Anus, Poplawsky, Jonathan D., Aguiar, Jeffery A., Bei, Hongbin, Aidhy, Dilpuneet S., Edmondson, Philip D., and Zhang, Yanwen. Mon . "Nanoprecipitates to Enhance Radiation Tolerance in High-Entropy Alloys". United States. https://doi.org/10.1021/acsami.2c17540. https://www.osti.gov/servlets/purl/1997671.
@article{osti_1997671,
title = {Nanoprecipitates to Enhance Radiation Tolerance in High-Entropy Alloys},
author = {Kombaiah, Boopathy and Zhou, Yufan and Jin, Ke and Manzoor, Anus and Poplawsky, Jonathan D. and Aguiar, Jeffery A. and Bei, Hongbin and Aidhy, Dilpuneet S. and Edmondson, Philip D. and Zhang, Yanwen},
abstractNote = {The growth of advanced energy technologies for power generation is enabled by the design, development, and integration of structural materials that can withstand extreme environments, such as high temperatures, radiation damage, and corrosion. High-entropy alloys (HEAs) are a class of structural materials in which suitable chemical elements in four or more numbers are mixed to typically produce single-phase concentrated solid solution alloys (CSAs). Many of these alloys exhibit good radiation tolerance like limited void swelling and hardening up to relatively medium radiation doses (tens of displacements per atom (dpa)); however, at higher radiation damage levels (>50 dpa), some HEAs suffer from considerable void swelling limiting their near-term acceptance for advanced nuclear reactor concepts. In this study, we developed a HEA containing a high density of Cu-rich nanoprecipitates distributed in the HEA matrix. The Cu-added HEA, NiCoFeCrCu0.12, shows excellent void swelling resistance and negligible radiation-induced hardening upon irradiation up to high radiation doses (i.e., higher than 100 dpa). The void swelling resistance of the alloy is measured to be significantly better than NiCoFeCr CSA and austenitic stainless steels. Density functional theory simulations predict lower vacancy and interstitial formation energies at the coherent interfaces between Cu-rich nanoprecipitates and the HEA matrix. The alloy maintained a high sink strength achieved via nanoprecipitates and the coherent interface with the matrix at a high radiation dose (~50 dpa). From our experiments and simulations, the effective recombination of radiation-produced vacancies and interstitials at the coherent interfaces of the nanoprecipitates is suggested to be the critical mechanism responsible for the radiation tolerance of the alloy. Furthermore, the materials design strategy based on incorporating a high density of interfaces can be applied to high-entropy alloy systems to improve their radiation tolerance.},
doi = {10.1021/acsami.2c17540},
journal = {ACS Applied Materials and Interfaces},
number = 3,
volume = 15,
place = {United States},
year = {Mon Jan 09 00:00:00 EST 2023},
month = {Mon Jan 09 00:00:00 EST 2023}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Schematic representation of NiFeCoCr | Ni0.37Cu0.63 interface. Filled circles are the atomic species, and empty squares are the vacancies. The interface is between Ni0.37Cu0.63 precipitates (left side) and the NiFeCoCr matrix (right side).

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