High radiation tolerance of an ultrastrong nanostructured NiCoCr alloy with stable dispersed nanooxides and fine grain structure

Chenyang Lu; Mingyang Li; Pengyuan Xiu; Xing Wang; Gihan Velişa; Li Jiang; Karren L. More; Jonathan D. Poplawsky; Yongqin Chang; Yanwen Zhang; Lumin Wang

doi:10.1016/j.jnucmat.2021.153316

High radiation tolerance of an ultrastrong nanostructured NiCoCr alloy with stable dispersed nanooxides and fine grain structure

Chenyang Lu, Mingyang Li, Pengyuan Xiu, Xing Wang, Gihan Velişa, Li Jiang, Karren L. More, Jonathan D. Poplawsky, Yongqin Chang, Yanwen Zhang, Lumin Wang

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The present paper reports the irradiation behavior of nanostructured NiCoCr medium entropy alloy enhanced by Y-Hf-O nanooxides and fine grains produced by powder metallurgy. Ion beam irradiation to a peak dose of 130 dpa at 580°C produced neither detectable void swelling nor irradiation-induced hardening, in contrast to significant void swelling and property degradation of single phase NiCoCr concentrated solid-solution alloy under the similar irradiation condition. The dispersed nanooxides and high density of grain boundaries act as defect sinks that effectively annihilate irradiation-induced interstitials and vacancies. Furthermore, high-density nanooxides maintain their crystalline structures and stabilize the grain boundaries during irradiation.

Original language	English
Article number	153316
Journal	Journal of Nuclear Materials
Volume	557
DOIs	https://doi.org/10.1016/j.jnucmat.2021.153316
State	Published - Dec 15 2021

Funding

This work was supported as part of the Energy Dissipation to Defect Evolution (EDDE) Center, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences . Ion beam work was performed at the UT–ORNL Ion Beam Materials Laboratory located on the campus of the University of Tennessee–Knoxville . The TEM analysis was conducted in the Michigan Center for Material Characterization of the University of Michigan. This work was supported as part of the Energy Dissipation to Defect Evolution (EDDE) Center, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences. Ion beam work was performed at the UT?ORNL Ion Beam Materials Laboratory located on the campus of the University of Tennessee?Knoxville. The TEM analysis was conducted in the Michigan Center for Material Characterization of the University of Michigan.

Funders	Funder number
UT?ORNL Ion Beam Materials Laboratory
University of Tennessee?Knoxville
U.S. Department of Energy
Office of Science
Basic Energy Sciences

Keywords

Atom probe
High entropy alloy
Irradiation effects
Mechanical alloying
Nanooxides
NiCoCr
Tomography

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10.1016/j.jnucmat.2021.153316

Cite this

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title = "High radiation tolerance of an ultrastrong nanostructured NiCoCr alloy with stable dispersed nanooxides and fine grain structure",

abstract = "The present paper reports the irradiation behavior of nanostructured NiCoCr medium entropy alloy enhanced by Y-Hf-O nanooxides and fine grains produced by powder metallurgy. Ion beam irradiation to a peak dose of 130 dpa at 580°C produced neither detectable void swelling nor irradiation-induced hardening, in contrast to significant void swelling and property degradation of single phase NiCoCr concentrated solid-solution alloy under the similar irradiation condition. The dispersed nanooxides and high density of grain boundaries act as defect sinks that effectively annihilate irradiation-induced interstitials and vacancies. Furthermore, high-density nanooxides maintain their crystalline structures and stabilize the grain boundaries during irradiation.",

keywords = "Atom probe, High entropy alloy, Irradiation effects, Mechanical alloying, Nanooxides, NiCoCr, Tomography",

author = "Chenyang Lu and Mingyang Li and Pengyuan Xiu and Xing Wang and Gihan Veli{\c s}a and Li Jiang and More, {Karren L.} and Poplawsky, {Jonathan D.} and Yongqin Chang and Yanwen Zhang and Lumin Wang",

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doi = "10.1016/j.jnucmat.2021.153316",

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T1 - High radiation tolerance of an ultrastrong nanostructured NiCoCr alloy with stable dispersed nanooxides and fine grain structure

AU - Lu, Chenyang

AU - Li, Mingyang

AU - Xiu, Pengyuan

AU - Wang, Xing

AU - Velişa, Gihan

AU - Jiang, Li

AU - More, Karren L.

AU - Poplawsky, Jonathan D.

AU - Chang, Yongqin

AU - Zhang, Yanwen

AU - Wang, Lumin

PY - 2021/12/15

Y1 - 2021/12/15

N2 - The present paper reports the irradiation behavior of nanostructured NiCoCr medium entropy alloy enhanced by Y-Hf-O nanooxides and fine grains produced by powder metallurgy. Ion beam irradiation to a peak dose of 130 dpa at 580°C produced neither detectable void swelling nor irradiation-induced hardening, in contrast to significant void swelling and property degradation of single phase NiCoCr concentrated solid-solution alloy under the similar irradiation condition. The dispersed nanooxides and high density of grain boundaries act as defect sinks that effectively annihilate irradiation-induced interstitials and vacancies. Furthermore, high-density nanooxides maintain their crystalline structures and stabilize the grain boundaries during irradiation.

AB - The present paper reports the irradiation behavior of nanostructured NiCoCr medium entropy alloy enhanced by Y-Hf-O nanooxides and fine grains produced by powder metallurgy. Ion beam irradiation to a peak dose of 130 dpa at 580°C produced neither detectable void swelling nor irradiation-induced hardening, in contrast to significant void swelling and property degradation of single phase NiCoCr concentrated solid-solution alloy under the similar irradiation condition. The dispersed nanooxides and high density of grain boundaries act as defect sinks that effectively annihilate irradiation-induced interstitials and vacancies. Furthermore, high-density nanooxides maintain their crystalline structures and stabilize the grain boundaries during irradiation.

KW - Atom probe

KW - High entropy alloy

KW - Irradiation effects

KW - Mechanical alloying

KW - Nanooxides

KW - NiCoCr

KW - Tomography

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DO - 10.1016/j.jnucmat.2021.153316

M3 - Article

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SN - 0022-3115

VL - 557

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 153316

ER -

High radiation tolerance of an ultrastrong nanostructured NiCoCr alloy with stable dispersed nanooxides and fine grain structure

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Keywords

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