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

Yanwen Zhang, Matheus A Tunes, Miguel L Crespillo, Fuxiang Zhang, Walker L Boldman, Philip D Rack, Li Jiang, Chen Xu, Graeme Greaves, Stephen E Donnelly, Lumin Wang, William J Weber

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.
LanguageEnglish
Article number294004
Number of pages1
JournalNanotechnology
Volume30
Issue number29
DOIs
Publication statusPublished - 1 May 2019

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Grain growth
Thermodynamic stability
Entropy
Phase stability
Irradiation
Transmission electron microscopy
Microstructural evolution
Ion bombardment
Synchrotrons
Dosimetry
Grain boundaries
Diffraction
Statistics
X rays
Atoms
Temperature

Cite this

Zhang, Y., Tunes, M. A., Crespillo, M. L., Zhang, F., Boldman, W. L., Rack, P. D., ... Weber, W. J. (2019). Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy. Nanotechnology, 30(29), [294004]. https://doi.org/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. In: Nanotechnology. 2019 ; Vol. 30, No. 29.
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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.",
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Zhang, Y, Tunes, MA, Crespillo, ML, Zhang, F, Boldman, WL, Rack, PD, Jiang, L, Xu, C, Greaves, G, Donnelly, SE, Wang, L & Weber, WJ 2019, 'Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy', Nanotechnology, vol. 30, no. 29, 294004. https://doi.org/10.1088/1361-6528/ab1605

Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy. / 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.

In: Nanotechnology, Vol. 30, No. 29, 294004, 01.05.2019.

Research output: Contribution to journalArticle

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T1 - Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy

AU - Zhang, Yanwen

AU - Tunes, Matheus A

AU - Crespillo, Miguel L

AU - Zhang, Fuxiang

AU - Boldman, Walker L

AU - Rack, Philip D

AU - Jiang, Li

AU - Xu, Chen

AU - Greaves, Graeme

AU - Donnelly, Stephen E

AU - Wang, Lumin

AU - Weber, William J

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N2 - 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.

AB - 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.

KW - chemical disorder

KW - ion-solid interactions

KW - concentrated solid solution alloys

KW - High entropy alloys

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Zhang Y, Tunes MA, Crespillo ML, Zhang F, Boldman WL, Rack PD et al. Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy. Nanotechnology. 2019 May 1;30(29). 294004. https://doi.org/10.1088/1361-6528/ab1605