抄録
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 Fe3+ 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.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 2658-2661 |
| ページ数 | 4 |
| ジャーナル | Fusion Engineering and Design |
| 巻 | 86 |
| 号 | 9-11 |
| DOI | |
| 出版ステータス | Published - 2011 10月 |
ASJC Scopus subject areas
- 土木構造工学
- 原子力エネルギーおよび原子力工学
- 材料科学（全般）
- 機械工学