challenge to evaluation of irradiation hardening without hardness tests by nanoindentation method

• Project/Area Number: 25630432
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear engineering
• Research Institution: Kyoto University
• Principal Investigator: KASADA Ryuta 京都大学, エネルギー理工学研究所, 准教授 (20335227)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 原子力材料 / 力学特性 / 照射硬化 / ナノインデンテーション / 超微小試験技術 / イオン照射 / 超微小試験 / 強度特性 / ひずみ速度

Outline of Final Research Achievements

This is an experimental study which aims to evaluate irradiation hardening not by hardness but directly by nanoindentation. As a main achievement, micro-pillar compression test method was examined to evaluate mechanical properties of the ion-irradiated material. Also, the pop-in phenomenon of a single crystal material by nanoindetation was investigated to reveal ion-irradiation effect on the critical shear stress. In addition, a new analysis method for nanoindentation hardness test on ion-irradiated materials were propesed.

Research Products

• [Journal Article] 原子炉・核融合炉材料の照射硬化評価のための硬さ試験とナノインデンテーション (2015)
  • Author(s): 笠田竜太
  • Journal Title: 材料試験技術 Volume: 60 Pages: 18-26
• [Journal Article] Evaluation of irradiation hardening of ion-irradiated V–4Cr–4Ti and V-4Cr-4Ti-0.15Y alloys by nanoindentation techniques (2014)
  • Author(s): Takeshi Miyazawa, Takuya Nagasaka, Ryuta Kasada, Yoshimitsu Hishinuma, Takeo Muroga, Hideo Watanabe, Takuya Yamamoto, Shuhei Nogami, Masahiko Hatakeyama
  • Journal Title: Journal of Nuclear Materials Volume: 455 Issue: 1-3 Pages: 440-444
  • DOI: 10.1016/j.jnucmat.2014.07.059
  • Peer Reviewed
• [Journal Article] Depth-dependent nanoindentation hardness of reduced-activation ferritic steels after MeV Fe-ion irradiation (2014)
  • Author(s): Ryuta Kasada, Satoshi Konishi, Kiyohiro Yabuuchi, Shuhei Nogami, Masami Ando, Dai Hamaguchi, Hiroyasu Tanigawa
  • Journal Title: Fusion Engineering and Design Volume: 89 Issue: 7-8 Pages: 1637-1641
  • DOI: 10.1016/j.fusengdes.2014.03.068
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 原子炉・核融合材料の照射硬化評価のための硬さ試験とナノインデンテーション試験 (2015)
  • Author(s): 笠田竜太
  • Organizer: 第262回材料試験技術シンポジウム
  • Place of Presentation: (独)産業技術総合研究所 臨海副都心センター
  • Year and Date: 2015-01-27
  • Invited
• [Presentation] Estimation of Vickers hardness from nanoindentation hardness of ion-irradiated materials (2014)
  • Author(s): Ryuta Kasada
  • Organizer: 12th Japan-China Symposium on Materials for Advanced Energy Systems and Fission & Fusion Engineering
  • Place of Presentation: 静岡市アザレア
  • Year and Date: 2014-09-17 – 2014-09-20
• [Presentation] 「最新ナノミクロ分析技術の原子力材料への展開」 (4) ナノインデンテーションによる材料強度評価 (2014)
  • Author(s): 笠田竜太
  • Organizer: 日本原子力学会2014年秋の年会
  • Place of Presentation: 京都大学吉田キャンパス
  • Year and Date: 2014-09-08 – 2014-09-10
  • Invited
• [Presentation] 低放射化バナジウム合金の試料表面における重イオン照射領域の強度評価 (2014)
  • Author(s): 宮澤健、笠田竜太、菱沼良光、室賀健夫、渡邉英雄、山本琢也、野上修平 、畠山賢彦、
  • Organizer: 第10回核融合エネルギー連合講演会
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2014-06-19 – 2014-06-20
• [Presentation] ナノインデンテーション法によるイオン照射材料の表面硬化特性評価
  • Author(s): 笠田竜太、石井大貴、落合良介、小西哲之、濱口大、安堂正巳、谷川博康
  • Organizer: 日本金属学会春期講演大会
  • Place of Presentation: 東京工業大学大岡山キャンパス
• [Presentation] 低放射化フェライト鋼の強度特性のひずみ速度依存性
  • Author(s): 石井大貴、笠田竜太、小西哲之
  • Organizer: 日本原子力学会2014年春の年会
  • Place of Presentation: 東京都市大学世田谷キャンパス