Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation

Xiang Liu; Yinbin Miao; Yaqiao Wu; Stuart A. Maloy; James F. Stubbins

doi:10.1016/j.scriptamat.2017.05.023

Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation

Xiang Liu, Yinbin Miao, Yaqiao Wu, Stuart A. Maloy, James F. Stubbins

Nuclear, Plasma, and Radiological Engineering

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

Abstract

Here, we report atom probe tomography results of the nanoclusters in a neutron-irradiated oxide dispersion strengthened alloy. Following irradiation to 5 dpa at target temperatures of 300 °C and 450 °C, fewer large nanoclusters were found and the residual nanoclusters tend to reach an equilibrium Guinier radius of 1.8 nm. With increasing dose, evident decrease in peak oxygen and titanium (but not yttrium) concentrations in the nanoclusters was observed, which was explained by atomic weight, solubility, diffusivity, and chemical bonding arguments. The chemical modifications indicate the equilibrium size is indeed a balance of two competing processes: radiation enhanced diffusion and collisional dissolution.

Original language	English (US)
Pages (from-to)	57-61
Number of pages	5
Journal	Scripta Materialia
Volume	138
DOIs	https://doi.org/10.1016/j.scriptamat.2017.05.023
State	Published - Sep 2017

Keywords

Atom probe tomography
Microstructure
Neutron irradiation
Oxide dispersion strengthened (ODS) alloy

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Online availability

10.1016/j.scriptamat.2017.05.023

Library availability

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title = "Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation",

abstract = "Here, we report atom probe tomography results of the nanoclusters in a neutron-irradiated oxide dispersion strengthened alloy. Following irradiation to 5 dpa at target temperatures of 300 °C and 450 °C, fewer large nanoclusters were found and the residual nanoclusters tend to reach an equilibrium Guinier radius of 1.8 nm. With increasing dose, evident decrease in peak oxygen and titanium (but not yttrium) concentrations in the nanoclusters was observed, which was explained by atomic weight, solubility, diffusivity, and chemical bonding arguments. The chemical modifications indicate the equilibrium size is indeed a balance of two competing processes: radiation enhanced diffusion and collisional dissolution.",

keywords = "Atom probe tomography, Microstructure, Neutron irradiation, Oxide dispersion strengthened (ODS) alloy",

author = "Xiang Liu and Yinbin Miao and Yaqiao Wu and Maloy, {Stuart A.} and Stubbins, {James F.}",

note = "Funding Information: This work was funded by Department of Energy's NEUP program DOE INL 00127139. The RTE projects 15-538 and 15-539 were supported by the U.S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-051D14517 as part of a Nuclear Science User Facilities experiment. The authors would like to thank Jatuporn Burns and Allyssa Bateman at the Center for Advanced Energy Studies for assisting with the FIB sample preparation. They would also like to thank NSUF staff Collin Knight and MaCS Lab lead Joanna Taylor for their help with coordinating the projects. Publisher Copyright: {\textcopyright} 2017 Acta Materialia Inc.",

year = "2017",

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doi = "10.1016/j.scriptamat.2017.05.023",

language = "English (US)",

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T1 - Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation

AU - Liu, Xiang

AU - Miao, Yinbin

AU - Wu, Yaqiao

AU - Maloy, Stuart A.

AU - Stubbins, James F.

N1 - Funding Information: This work was funded by Department of Energy's NEUP program DOE INL 00127139. The RTE projects 15-538 and 15-539 were supported by the U.S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-051D14517 as part of a Nuclear Science User Facilities experiment. The authors would like to thank Jatuporn Burns and Allyssa Bateman at the Center for Advanced Energy Studies for assisting with the FIB sample preparation. They would also like to thank NSUF staff Collin Knight and MaCS Lab lead Joanna Taylor for their help with coordinating the projects. Publisher Copyright: © 2017 Acta Materialia Inc.

PY - 2017/9

Y1 - 2017/9

N2 - Here, we report atom probe tomography results of the nanoclusters in a neutron-irradiated oxide dispersion strengthened alloy. Following irradiation to 5 dpa at target temperatures of 300 °C and 450 °C, fewer large nanoclusters were found and the residual nanoclusters tend to reach an equilibrium Guinier radius of 1.8 nm. With increasing dose, evident decrease in peak oxygen and titanium (but not yttrium) concentrations in the nanoclusters was observed, which was explained by atomic weight, solubility, diffusivity, and chemical bonding arguments. The chemical modifications indicate the equilibrium size is indeed a balance of two competing processes: radiation enhanced diffusion and collisional dissolution.

AB - Here, we report atom probe tomography results of the nanoclusters in a neutron-irradiated oxide dispersion strengthened alloy. Following irradiation to 5 dpa at target temperatures of 300 °C and 450 °C, fewer large nanoclusters were found and the residual nanoclusters tend to reach an equilibrium Guinier radius of 1.8 nm. With increasing dose, evident decrease in peak oxygen and titanium (but not yttrium) concentrations in the nanoclusters was observed, which was explained by atomic weight, solubility, diffusivity, and chemical bonding arguments. The chemical modifications indicate the equilibrium size is indeed a balance of two competing processes: radiation enhanced diffusion and collisional dissolution.

KW - Atom probe tomography

KW - Microstructure

KW - Neutron irradiation

KW - Oxide dispersion strengthened (ODS) alloy

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JO - Scripta Materialia

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Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation

Abstract

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