skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy

Abstract

Grain growth and phase stability of a nanocrystalline face-centered cubic (fcc) Ni0.2Fe0.2Co0.2Cr0.2Cu0.2 high-entropy alloy (HEA), either thermally- or irradiation-induced, are investigated through in situ and post-irradiation transmission electron microscopy (TEM) characterization. Synchrotron and lab x-ray diffraction measurements are carried out to determine the microstructural evolution and phase stability with improved statistics. Under in situ TEM observation, the fcc structure is stable at 300 °C with a small amount of grain growth from 15.8 to ~20 nm being observed after 1800 s. At 500 °C, however, some abnormal growth activities are observed after 1400 s, and secondary phases are formed. Under 3 MeV Ni room temperature ion irradiation up to an extreme dose of nearly 600 displacements per atom, the fcc phase is stable and the average grain size increases from 15.6 to 25.2 nm. Grain growth mechanisms driven by grain rotation, grain boundary curvature, and disorder are discussed.

Authors:
ORCiD logo; ORCiD logo; ; ORCiD logo; ; ; ; ; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); UT-Battelle LLC/ORNL, Oak Ridge, TN (Unted States); Oak Ridge Associated Univ., Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1566674
DOE Contract Number:  
AC05-00OR22725; AC05-06OR23100
Resource Type:
Journal Article
Journal Name:
Nanotechnology
Additional Journal Information:
Journal Volume: 30; Journal Issue: 29; Journal ID: ISSN 0957-4484
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
phonons, thermal conductivity, nuclear (including radiation effects), defects, spin dynamics, materials and chemistry by design, synthesis (novel materials)

Citation Formats

Zhang, Yanwen, Tunes, Matheus A., Crespillo, Miguel L., Zhang, Fuxiang, Boldman, Walker L., Rack, Philip D., Jiang, Li, Xu, Chen, Greaves, Graeme, Donnelly, Stephen E., Wang, Lumin, and Weber, William J. Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy. United States: N. p., 2019. Web. doi:10.1088/1361-6528/ab1605.
Zhang, Yanwen, Tunes, Matheus A., Crespillo, Miguel L., Zhang, Fuxiang, Boldman, Walker L., Rack, Philip D., Jiang, Li, Xu, Chen, Greaves, Graeme, Donnelly, Stephen E., Wang, Lumin, & Weber, William J. Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy. United States. doi:10.1088/1361-6528/ab1605.
Zhang, Yanwen, Tunes, Matheus A., Crespillo, Miguel L., Zhang, Fuxiang, Boldman, Walker L., Rack, Philip D., Jiang, Li, Xu, Chen, Greaves, Graeme, Donnelly, Stephen E., Wang, Lumin, and Weber, William J. Wed . "Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy". United States. doi:10.1088/1361-6528/ab1605.
@article{osti_1566674,
title = {Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy},
author = {Zhang, Yanwen and Tunes, Matheus A. and Crespillo, Miguel L. and Zhang, Fuxiang and Boldman, Walker L. and Rack, Philip D. and Jiang, Li and Xu, Chen and Greaves, Graeme and Donnelly, Stephen E. and Wang, Lumin and Weber, William J.},
abstractNote = {Grain growth and phase stability of a nanocrystalline face-centered cubic (fcc) Ni0.2Fe0.2Co0.2Cr0.2Cu0.2 high-entropy alloy (HEA), either thermally- or irradiation-induced, are investigated through in situ and post-irradiation transmission electron microscopy (TEM) characterization. Synchrotron and lab x-ray diffraction measurements are carried out to determine the microstructural evolution and phase stability with improved statistics. Under in situ TEM observation, the fcc structure is stable at 300 °C with a small amount of grain growth from 15.8 to ~20 nm being observed after 1800 s. At 500 °C, however, some abnormal growth activities are observed after 1400 s, and secondary phases are formed. Under 3 MeV Ni room temperature ion irradiation up to an extreme dose of nearly 600 displacements per atom, the fcc phase is stable and the average grain size increases from 15.6 to 25.2 nm. Grain growth mechanisms driven by grain rotation, grain boundary curvature, and disorder are discussed.},
doi = {10.1088/1361-6528/ab1605},
journal = {Nanotechnology},
issn = {0957-4484},
number = 29,
volume = 30,
place = {United States},
year = {2019},
month = {5}
}

Works referenced in this record:

Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes
journal, May 2004

  • Yeh, J.-W.; Chen, S.-K.; Lin, S.-J.
  • Advanced Engineering Materials, Vol. 6, Issue 5, p. 299-303
  • DOI: 10.1002/adem.200300567

Self-Assembly of Ordered, Robust, Three-Dimensional Gold Nanocrystal/Silica Arrays
journal, April 2004