Establishment of SCC retardation model considered with potential aging degradation in low-carbon stainless steel welds

• Project/Area Number: 22760070
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Materials/Mechanics of materials
• Research Institution: Tohoku University
• Principal Investigator: ABE Hiroshi 東北大学, 大学院・工学研究科, 助教 (30540695)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: ステンレス鋼 / 溶接部 / 凝固モード / 応力腐食割れ / 熱時効 / スピノーダル分解 / δ-フェライト / 低温時効 / オーステナイト系ステンレス鋼 / 溶接金属 / δーフェライト

Research Abstract

Hardening rate of δ-ferrite in low-carbon austenitic stainless steel welds has been evaluated by thermal treatment at 310-410 oC. The hardening rate of that in boiling water reactor coolant temperature has been predicted based on the above results. Effect of aging on corrosion characteristics and stress corrosion cracking (SCC) behavior of welds have been evaluated by SCC experiments in high-temperature water. Crack growth rate in δ-ferrite has also been evaluated semi-quantitatively.

Research Products

• [Journal Article] Role of δ-ferrite in stress corrosion cracking retardation near fusion boundary of 316NG welds (2012)
  • Author(s): H. Abe, Y. Watanabe
  • Journal Title: Journal of Nuclear Materials Volume: 424 Pages: 57-61
  • Peer Reviewed
• [Journal Article] Effects of solidification mode and low-temperature aging on SCC behavior of type 316L SS welds in high-temperature water (2011)
  • Author(s): H. Abe, Y. Watanabe, T. Miyazaki
  • Journal Title: Proceedings of 19^<th> International Conference on Nuclear Engineering, CD-ROM
  • Peer Reviewed
• [Journal Article] Effects of solidification mode and low-temperature aging on SCC behavior of type 316L SS welds in high-temperature water (2011)
  • Author(s): Hiroshi Abe, Yutaka Watanabe, Takamichi Miyazaki
  • Journal Title: Proceedings of 19th International Conference on Nuclear Engineering Volume: (CD-ROM)
  • Peer Reviewed
• [Presentation] 316系低炭素ステンレス鋼溶接金属のBWR炉水温度域における熱時効脆化の評価 (2012)
  • Author(s): 阿部博志、渡辺豊、寺尾俊彦
  • Organizer: 日本保全学会第9回学術講演会
  • Place of Presentation: 東京
  • Year and Date: 2012-07-26
• [Presentation] オーステナイト系低炭素ステンレス鋼溶接金属のBWR温度域における熱時効脆化の評価 (2012)
  • Author(s): 寺尾俊彦、阿部博志、渡辺豊
  • Organizer: 日本機械学会第17回動力・エネルギー技術シンポジウム
  • Place of Presentation: 福岡市
  • Year and Date: 2012-06-21
• [Presentation] オーステナイト系低炭素ステンレス鋼溶接金属のBWR温度域における熱時効脆化の評価 (2012)
  • Author(s): 寺尾 俊彦
  • Organizer: 日本機械学会 第17回動力・エネルギー技術シンポジウム
  • Place of Presentation: 九州大学 病院キャンパス・百年講堂
• [Presentation] 316系低炭素ステンレス鋼溶接金属のBWR炉水温度域における熱時効脆化の評価 (2012)
  • Author(s): 阿部 博志
  • Organizer: 日本保全学会 第９回学術講演会
  • Place of Presentation: 一橋大学 一橋講堂
• [Presentation] 316系低炭素ステンレス鋼溶接金属の低温時効硬化現象に関する研究 (2011)
  • Author(s): 寺尾俊彦、阿部博志、渡辺豊
  • Organizer: 原子力学会東北支部第35回研究発表会
  • Place of Presentation: 仙台市
  • Year and Date: 2011-12-09
• [Presentation] 316系低炭素ステンレス鋼溶接金属の低温時効硬化現象に関する研究 (2011)
  • Author(s): 寺尾俊彦、阿部博志、渡辺豊
  • Organizer: 原子力学会東北支部第35回研究発表会
  • Place of Presentation: 東北大学大学院工学研究科総合研究棟大講義室2
  • Year and Date: 2011-12-09
• [Presentation] 316系低炭素ステンレス鋼溶接金属の低温時効硬化現象に関する研究 (2011)
  • Author(s): 寺尾俊彦、阿部博志、渡辺豊、宮崎孝道
  • Organizer: 第7回量子エネルギー工学フォーラム
  • Place of Presentation: 青森県六ヶ所村
  • Year and Date: 2011-08-23
• [Presentation] 316系低炭素ステンレス鋼溶接金属の低温時効硬化現象に関する研究 (2011)
  • Author(s): 寺尾俊彦、阿部博志、渡辺豊、宮崎孝道
  • Organizer: 第7回量子エネルギー工学フォーラム
  • Place of Presentation: 六ヶ所村文化交流プラザ スワニー大会議室
  • Year and Date: 2011-08-23
• [Presentation] SUS316L溶接金属中δ-フェライトの310℃および335℃におけるスピノーダル分解速度の評価 (2011)
  • Author(s): 寺尾俊彦、渡辺豊、阿部博志
  • Organizer: 日本機械学会東北学生会第41回学生員卒業研究発表講演会
  • Place of Presentation: 盛岡市
  • Year and Date: 2011-03-03
• [Presentation] SUS316L溶接金属中δ-フェライトの310℃および335℃におけるスピノーダル分解速度の評価 (2011)
  • Author(s): 寺尾俊彦、渡辺豊、阿部博志
  • Organizer: (社)機械学会東北学生会第41回学生員卒業研究発表講演会
  • Place of Presentation: 盛岡
  • Year and Date: 2011-03-03
• [Presentation] Potential Importance of Microstructural Aspects for Better Understanding of SCC Behaviors in Stainless Steels (2010)
  • Author(s): Y. Watanabe, H. Abe
  • Organizer: International Seminar on Maintenance Science and Technology for Nuclear Power Plant
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2010-11-03
• [Presentation] Potential Importance of Microstructural Aspects for Better Understanding of SCC Behaviors in Stainless Steels (2010)
  • Author(s): Yutaka Watanabe, Hiroshi Abe
  • Organizer: International Seminar on Maintenance Science and Technology for Nuclear Power Plant
  • Place of Presentation: Sendai
  • Year and Date: 2010-11-03