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

In this paper, 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. Finally, the chemical modifications indicate the equilibrium size is indeed a balance of two competing processes: radiation enhanced diffusion and collisional dissolution.
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [4] ; ORCiD logo [5]
  1. Univ. of Illinois, Urbana, IL (United States). Dept. of Nuclear, Plasma, and Radiological Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division
  3. Boise State Univ., ID (United States). Dept. of Materials Science and Engineering; Center for Advanced Energy Studies, Idaho Falls, ID (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Univ. of Illinois, Urbana, IL (United States). Dept. of Nuclear, Plasma, and Radiological Engineering; Kyushu Univ., Fukuoka (Japan). International Inst. for Carbon Neutral Energy Research (WPI-I2CNER)
Publication Date:
Report Number(s):
LA-UR-17-25395
Journal ID: ISSN 1359-6462
Grant/Contract Number:
AC07-05ID14517
Type:
Accepted Manuscript
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 138; Journal ID: ISSN 1359-6462
Publisher:
Elsevier
Research Org:
Univ. of Illinois at Urbana-Champaign, IL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE). Nuclear Energy University Program (NEUP)
Contributing Orgs:
Kyushu Univ., Fukuoka (Japan); Boise State Univ., ID (United States); Center for Advanced Energy Studies, Idaho Falls, ID (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Oxide dispersion strengthened (ODS) alloy; Microstructure; Atom probe tomography; Neutron irradiation
OSTI Identifier:
1374336
Alternate Identifier(s):
OSTI ID: 1396384

Liu, Xiang, Miao, Yinbin, Wu, Yaqiao, Maloy, Stuart A., and Stubbins, James F.. Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation. United States: N. p., Web. doi:10.1016/j.scriptamat.2017.05.023.
Liu, Xiang, Miao, Yinbin, Wu, Yaqiao, Maloy, Stuart A., & Stubbins, James F.. Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation. United States. doi:10.1016/j.scriptamat.2017.05.023.
Liu, Xiang, Miao, Yinbin, Wu, Yaqiao, Maloy, Stuart A., and Stubbins, James F.. 2017. "Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation". United States. doi:10.1016/j.scriptamat.2017.05.023. https://www.osti.gov/servlets/purl/1374336.
@article{osti_1374336,
title = {Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation},
author = {Liu, Xiang and Miao, Yinbin and Wu, Yaqiao and Maloy, Stuart A. and Stubbins, James F.},
abstractNote = {In this paper, 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. Finally, the chemical modifications indicate the equilibrium size is indeed a balance of two competing processes: radiation enhanced diffusion and collisional dissolution.},
doi = {10.1016/j.scriptamat.2017.05.023},
journal = {Scripta Materialia},
number = ,
volume = 138,
place = {United States},
year = {2017},
month = {6}
}