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

doi:10.1088/1361-6528/ab1605

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 journal › Article › peer-review

61 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.

Original language	English
Article number	294004
Number of pages	1
Journal	Nanotechnology
Volume	30
Issue number	29
Early online date	1 May 2019
DOIs	https://doi.org/10.1088/1361-6528/ab1605
Publication status	Published - 19 Jul 2019

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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.",

keywords = "chemical disorder, ion-solid interactions, concentrated solid solution alloys, High entropy alloys, highentropy alloys",

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

year = "2019",

month = jul,

day = "19",

doi = "10.1088/1361-6528/ab1605",

language = "English",

volume = "30",

journal = "Nanotechnology",

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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

PY - 2019/7/19

Y1 - 2019/7/19

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

KW - highentropy alloys

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U2 - 10.1088/1361-6528/ab1605

DO - 10.1088/1361-6528/ab1605

M3 - Article

VL - 30

JO - Nanotechnology

JF - Nanotechnology

SN - 0957-4484

IS - 29

M1 - 294004

ER -

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

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

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