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

School of Energy and Power Engineering

University of Michigan, Ann Arbor
University of Science and Technology Beijing
Oak Ridge National Laboratory
University of Tennessee

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

19 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 - 15 Dec 2021

Keywords

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

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10.1016/j.jnucmat.2021.153316

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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",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = dec,

day = "15",

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

language = "英语",

volume = "557",

journal = "Journal of Nuclear Materials",

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TY - JOUR

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

UR - https://www.scopus.com/pages/publications/85116371314

U2 - 10.1016/j.jnucmat.2021.153316

DO - 10.1016/j.jnucmat.2021.153316

M3 - 文章

AN - SCOPUS:85116371314

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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