The dominant mechanisms for the formation of solute-rich clusters in low-Cu steels under irradiation

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The dominant mechanisms for the formation of solute-rich clusters in low-Cu steels under irradiation. / Castin, Nicolas; Bonny, Giovanni; Bakaev, Alexander; Bergner, Frank; Domain, Christophe; Hyde, Jonathan M.; Messina, L.; Radiguet, Bertrand; Malerba, Lorenzo.

In: Materials Today Energy, 03.07.2020.

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Castin, Nicolas ; Bonny, Giovanni ; Bakaev, Alexander ; Bergner, Frank ; Domain, Christophe ; Hyde, Jonathan M. ; Messina, L. ; Radiguet, Bertrand ; Malerba, Lorenzo. / The dominant mechanisms for the formation of solute-rich clusters in low-Cu steels under irradiation. In: Materials Today Energy. 2020.

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@article{5cf3f805a6c54f839d391f0c33888c68,
title = "The dominant mechanisms for the formation of solute-rich clusters in low-Cu steels under irradiation",
abstract = "The formation of nano-sized, coherent, solute-rich clusters (NSRC) is known to be an important factor causing the degradation of the macroscopic properties of steels under irradiation. The mechanisms driving their formation are still debated. This work focuses on low-Cu reactor pressure vessel (RPV) steels, where solute species are generally not expected to precipitate. We rationalize the processes that take place at the nanometre scale under irradiation, relying on the latest theoretical and experimental evidence on atomic-level diffusion and transport processes. These are compiled in a new model, based on the object kinetic Monte Carlo (OKMC) technique. We evaluate the relevance of the underlying physical assumptions by applying the model to a large variety of irradiation experiments. Our model predictions are compared with new experimental data obtained with atom probe tomography and small angle neutron scattering, complemented with information from the literature. The results of this study reveal that the role of immobilized self-interstitial atoms (SIA) loops dominates the nucleation process of NSRC.",
keywords = "Solutes precipitation, Kinetic Monte Carlo, Atom probe tomography, Hardening and embrittlement, Reactor pressure vessel steel",
author = "Nicolas Castin and Giovanni Bonny and Alexander Bakaev and Frank Bergner and Christophe Domain and Hyde, {Jonathan M.} and L. Messina and Bertrand Radiguet and Lorenzo Malerba",
note = "Score=10",
year = "2020",
month = "7",
day = "3",
doi = "10.1016/j.mtener.2020.100472",
language = "English",
journal = "Materials Today Energy",
issn = "2468-6069",
publisher = "Elsevier",

}

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TY - JOUR

T1 - The dominant mechanisms for the formation of solute-rich clusters in low-Cu steels under irradiation

AU - Castin, Nicolas

AU - Bonny, Giovanni

AU - Bakaev, Alexander

AU - Bergner, Frank

AU - Domain, Christophe

AU - Hyde, Jonathan M.

AU - Messina, L.

AU - Radiguet, Bertrand

AU - Malerba, Lorenzo

N1 - Score=10

PY - 2020/7/3

Y1 - 2020/7/3

N2 - The formation of nano-sized, coherent, solute-rich clusters (NSRC) is known to be an important factor causing the degradation of the macroscopic properties of steels under irradiation. The mechanisms driving their formation are still debated. This work focuses on low-Cu reactor pressure vessel (RPV) steels, where solute species are generally not expected to precipitate. We rationalize the processes that take place at the nanometre scale under irradiation, relying on the latest theoretical and experimental evidence on atomic-level diffusion and transport processes. These are compiled in a new model, based on the object kinetic Monte Carlo (OKMC) technique. We evaluate the relevance of the underlying physical assumptions by applying the model to a large variety of irradiation experiments. Our model predictions are compared with new experimental data obtained with atom probe tomography and small angle neutron scattering, complemented with information from the literature. The results of this study reveal that the role of immobilized self-interstitial atoms (SIA) loops dominates the nucleation process of NSRC.

AB - The formation of nano-sized, coherent, solute-rich clusters (NSRC) is known to be an important factor causing the degradation of the macroscopic properties of steels under irradiation. The mechanisms driving their formation are still debated. This work focuses on low-Cu reactor pressure vessel (RPV) steels, where solute species are generally not expected to precipitate. We rationalize the processes that take place at the nanometre scale under irradiation, relying on the latest theoretical and experimental evidence on atomic-level diffusion and transport processes. These are compiled in a new model, based on the object kinetic Monte Carlo (OKMC) technique. We evaluate the relevance of the underlying physical assumptions by applying the model to a large variety of irradiation experiments. Our model predictions are compared with new experimental data obtained with atom probe tomography and small angle neutron scattering, complemented with information from the literature. The results of this study reveal that the role of immobilized self-interstitial atoms (SIA) loops dominates the nucleation process of NSRC.

KW - Solutes precipitation

KW - Kinetic Monte Carlo

KW - Atom probe tomography

KW - Hardening and embrittlement

KW - Reactor pressure vessel steel

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/39253824

U2 - 10.1016/j.mtener.2020.100472

DO - 10.1016/j.mtener.2020.100472

M3 - Article

JO - Materials Today Energy

JF - Materials Today Energy

SN - 2468-6069

M1 - 100472

ER -

ID: 6848584