Experimental approach for hardening mechanism of fast reactor structural materials due to thermal ageing and irradiation

• Project/Area Number: 23360426
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: University of Fukui
• Principal Investigator: KEN-ICHI Fukumoto 福井大学, 附属国際原子力工学研究所, 教授 (30261506)
• Co-Investigator(Kenkyū-buntansha): NOGIWA Kimihiro 福井大学, 附属国際原子力工学研究所, 研究員 (80465989) ; ONITSUKA Takashi 福井大学, 附属国際原子力工学研究所, 研究員 (90422336)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000); Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2011: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
• Keywords: 照射硬化 / TEM内引張その場観察 / 転位挙動 / 高速炉材料 / キャビティー・ボイド / 照射欠陥 / 照射損傷－強度相関 / イオン照射 / 転位運動 / 障害物強度因子 / 空孔型欠陥集合体 / bcc金属 / TEM『その場』観察 / ボイド / 交差すべり / TEM「その場」観察

Research Abstract

A method of in-situ measurement of dislocation behavior during tensile test in TEM column was adopted for obtaining values of the obstacle strength parameter for defect clusters in ion-irradiated SUS316L steels and bcc metals including pure V and pure Fe in order to evaluate lifetime of nuclear materials. It provides the accurate analysis for evaluating irradiation hardening quantitatively.
We succeeded to observe the direct interaction between void and mobile dislocation clearly and the obstacle barrier factor was derived for pure V and pure Fe. The obstacle barrier factor was ranged from 0.5 to 0.7 for 4nm to 14nm of void size with increase rate of 0.02/nm independent of metal species. Striking agreement was obtained for previous study. The results will be used to improve the accuracy of life time analysis for developing theoretical model method based on the microscopic-macroscopic correlation e during irradiation with the accurate obstacle barrier factor. .

Research Products

• [Journal Article] Tensile testing study of dynamic interactions between dislocations and precipitate in vanadium alloys (2013)
  • Author(s): K. Tougou, K. Nogiwa, K. Tachikawa, K. Fukumoto
  • Journal Title: Journal of Nuclear Materials Volume: 442 Issue: 1-3 Pages: S350-S353
  • DOI: 10.1016/j.jnucmat.2012.10.043
  • Peer Reviewed
• [Journal Article] <i>In</i>-<i>Situ</i> TEM Observation of Dislocation Interaction with Cavity in Ion-Irradiated Pure Vanadium during Tensile Test (2013)
  • Author(s): K. Tougou, K. Nogiwa, A. Shikata, K. Fukumoto
  • Journal Title: MATERIALS TRANSACTIONS Volume: 54 Issue: 7 Pages: 1095-1101
  • DOI: 10.2320/matertrans.M2013012
  • NAID: 10031183651
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed
• [Presentation] 純バナジウムにおける運動転位と 照射欠陥の相互作用に関する研究 (2013)
  • Author(s): 東郷広一, 野際 公宏, 四方 章仁, 福元謙一
  • Organizer: 日本原子力学会関西支部第9回若手研究者による研究発表会
  • Place of Presentation: 敦賀市
• [Presentation] 純鉄中のボイドと転位の動的相互作用 (2013)
  • Author(s): 四方章仁, 福元謙一, 野際公宏, 東郷広一
  • Organizer: 日本金属学会2013年秋期講演大会
  • Place of Presentation: 金沢市
• [Presentation] 純Fe中のボイドと転位の動的相互作用 (2013)
  • Author(s): 四方章仁、福元謙一、野際公宏、東郷広一
  • Organizer: 日本金属学会2013年秋季講演大会
  • Place of Presentation: 金沢大学
• [Presentation] 純バナジウムにおける運動転位と 照射欠陥の相互作用に関する研究 (2013)
  • Author(s): 東郷広一、四方章仁、野際公宏、福元謙一
  • Organizer: 日本原子力学会関西支部「第 9 回若手研究者による研究発表会」
  • Place of Presentation: 福井大学
• [Presentation] Study of dynamics interaction between dislocation and bubble in pure vanadium in tensile test (2012)
  • Author(s): K. Tougou, K. Nogiwa, A. Shikata, K. Fukumoto
  • Organizer: Numat-2012
  • Place of Presentation: Osaka/Japan
• [Presentation] 純バナジウムの照射欠陥と転位挙動の動的相互作用 (2012)
  • Author(s): 東郷広一, 福元謙一, 野際公宏
  • Organizer: 日本金属学会2012年秋期大会
  • Place of Presentation: 松山市
• [Presentation] Study of dynamics interaction between dislocation and bubble in pure vanadium in tensile test (2012)
  • Author(s): Kouichi Tougou
  • Organizer: Numat2012
  • Place of Presentation: Osaka, Japan
• [Presentation] 純バナジウム中の照射欠陥と転位挙動の 動的相互作用の研究 (2012)
  • Author(s): 四方章仁
  • Organizer: 日本金属学会秋の大会
  • Place of Presentation: 愛媛県松山市
• [Presentation] TEM内引張『その場』観察法を用いた純バナジウムの 空孔型欠陥集合体-転位相互作用に関する研究 (2012)
  • Author(s): 福元謙一
  • Organizer: 日本金属学会北陸信越支部講演大会
  • Place of Presentation: 福井県福井市
• [Presentation] STUDY OF DYNAMICS INTERACTION BETWEEN DISLOCATION AND PRECIPITATE IN VANADIUM ALLOYS IN TENSILE TEST (2011)
  • Author(s): K. Tougou, K. Tachikawa, K. Nogiwa, K. Fukumoto
  • Organizer: ICFRM-15
  • Place of Presentation: Charlston/USA
• [Presentation] 純バナジウムでの引張試験による転位とボイドの動的相互作用の研究 (2011)
  • Author(s): 東郷広一, 福元謙一, 野際公宏
  • Organizer: 日本原子力学会2011年秋の大会
  • Place of Presentation: 北九州市
• [Remarks] 研究内容(福井大学附属国際原子力工学研究所福元研究室)
  • URL: http://www.rine.u-fukui.ac.jp/fukumoto/resN3.html