Effect of statistically stored dislocations in tungsten on the irradiation induced nano-hardening analyzed by different methods

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Effect of statistically stored dislocations in tungsten on the irradiation induced nano-hardening analyzed by different methods. / Bonny, Giovanni; Khvan, Tymofii; Bakaeva, Anastasiia; Yin, Chao; Dubinko, Andrii; Cabet, Celine; Loyer-Prost, Marie; Castin, Nicolas; Bakaev, Alexander; Terentyev, Dmitry.

In: Journal of Nuclear Materials, Vol. 543, 152543, 23.09.2020, p. 1-8.

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@article{b09992a1fe624d0f9015d37d8e1b8d9c,
title = "Effect of statistically stored dislocations in tungsten on the irradiation induced nano-hardening analyzed by different methods",
abstract = "Tungsten self-ion irradiation was performed at 800 °C up to 0.01-1 dpa on two different W grades with essentially different dislocation density. Nanoindentation was applied to characterize the radiation hardening in two W grades with different microstructure. Different methods to analyze the indentation curves were applied to extract the bulk equivalent radiation hardening. It was shown that depending on the applied method, different outcomes may occur. The most satisfactory procedure was established and a consistent set of parameters was found. The bulk equivalent radiation hardening was found to saturate above 0.1 dpa. The characteristic distance between irradiation induced defects acting as dislocation pinning points was found to decrease up to 0.1 dpa, and then saturate/increase with irradiation dose. No essential difference in radiation hardening was observed between the studied W grades with essentially different initial dislocation density.",
keywords = "Ion irradiation, Tungsten",
author = "Giovanni Bonny and Tymofii Khvan and Anastasiia Bakaeva and Chao Yin and Andrii Dubinko and Celine Cabet and Marie Loyer-Prost and Nicolas Castin and Alexander Bakaev and Dmitry Terentyev",
note = "Score=10",
year = "2020",
month = sep,
day = "23",
doi = "10.1016/j.jnucmat.2020.152543",
language = "English",
volume = "543",
pages = "1--8",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Effect of statistically stored dislocations in tungsten on the irradiation induced nano-hardening analyzed by different methods

AU - Bonny, Giovanni

AU - Khvan, Tymofii

AU - Bakaeva, Anastasiia

AU - Yin, Chao

AU - Dubinko, Andrii

AU - Cabet, Celine

AU - Loyer-Prost, Marie

AU - Castin, Nicolas

AU - Bakaev, Alexander

AU - Terentyev, Dmitry

N1 - Score=10

PY - 2020/9/23

Y1 - 2020/9/23

N2 - Tungsten self-ion irradiation was performed at 800 °C up to 0.01-1 dpa on two different W grades with essentially different dislocation density. Nanoindentation was applied to characterize the radiation hardening in two W grades with different microstructure. Different methods to analyze the indentation curves were applied to extract the bulk equivalent radiation hardening. It was shown that depending on the applied method, different outcomes may occur. The most satisfactory procedure was established and a consistent set of parameters was found. The bulk equivalent radiation hardening was found to saturate above 0.1 dpa. The characteristic distance between irradiation induced defects acting as dislocation pinning points was found to decrease up to 0.1 dpa, and then saturate/increase with irradiation dose. No essential difference in radiation hardening was observed between the studied W grades with essentially different initial dislocation density.

AB - Tungsten self-ion irradiation was performed at 800 °C up to 0.01-1 dpa on two different W grades with essentially different dislocation density. Nanoindentation was applied to characterize the radiation hardening in two W grades with different microstructure. Different methods to analyze the indentation curves were applied to extract the bulk equivalent radiation hardening. It was shown that depending on the applied method, different outcomes may occur. The most satisfactory procedure was established and a consistent set of parameters was found. The bulk equivalent radiation hardening was found to saturate above 0.1 dpa. The characteristic distance between irradiation induced defects acting as dislocation pinning points was found to decrease up to 0.1 dpa, and then saturate/increase with irradiation dose. No essential difference in radiation hardening was observed between the studied W grades with essentially different initial dislocation density.

KW - Ion irradiation

KW - Tungsten

UR - https://ecm.sckcen.be/OTCS/llisapi.dll?func=ll&objId=46059461&objAction=download

U2 - 10.1016/j.jnucmat.2020.152543

DO - 10.1016/j.jnucmat.2020.152543

M3 - Article

VL - 543

SP - 1

EP - 8

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

M1 - 152543

ER -

ID: 7211664