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Title: A new approach to evaluate irradiation hardening of ion-irradiated ferritic alloys by nano-indentation techniques
Authors: Kasada, Ryuta  kyouindb  KAKEN_id
Takayama, Yoshiyuki
Yabuuchi, Kiyohiro  kyouindb  KAKEN_id
Kimura, Akihiko  kyouindb  KAKEN_id
Author's alias: 笠田, 竜太
Keywords: Ferritic alloys
Irradiation hardening
Ion-irradiation
Nano-indentation
Issue Date: Oct-2011
Publisher: Elsevier B.V.
Journal title: Fusion Engineering and Design
Volume: 86
Issue: 9-11
Start page: 2658
End page: 2661
Abstract: The present work investigates the irradiation hardening of Fe-based model ferritic alloys after Fe-ion irradiation experiments in order to deduce mechanistically based nominal hardness from the nano-indentation tests on the ion-irradiated surface. Ion-irradiation experiments were carried out at 290 °C with 6.4 MeV Fe[3+] ions. The constant stiffness measurement (CSM) was used to obtain the depth-profile of hardness. The results has been analyzed and discussed based on the Nix–Gao model and an extended film/substrate system hardness model. The depth-sensing nano-indentation techniques with CSM revealed that the hardness gradient of the unirradiated Fe-based model alloy can be explained through the indentation size effect (ISE). On the other hand, the gradient of ion-irradiated surface of these samples includes not only the ISE but also softer substrate effect (SSE). We propose a new approach to evaluate a nominal hardness, which may connect to the bulk hardness, from experimentally obtained nano-hardness depth profile data.
Rights: © 2011 Elsevier B.V.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/150441
DOI(Published Version): 10.1016/j.fusengdes.2011.03.073
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