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

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 hard...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nuclear materials 2021-12, Vol.557 (C), p.153316, Article 153316
Main Authors: Lu, Chenyang, Li, Mingyang, Xiu, Pengyuan, Wang, Xing, Velişa, Gihan, Jiang, Li, More, Karren L., Poplawsky, Jonathan D., Chang, Yongqin, Zhang, Yanwen, Wang, Lumin
Format: Article
Language:English
Subjects:
Alloys
Atom probe
Boundaries
Density
Entropy
Grain boundaries
Grain structure
High entropy alloy
Interstitials
Ion beams
Irradiation
Irradiation effects
Lattice vacancies
Mechanical alloying
Metallurgy
Nanooxides
Nanostructure
NiCoCr
Powder metallurgy
Radiation
Radiation dosage
Radiation tolerance
Solid solutions
Swelling
Tomography
Yttrium
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2021.153316