Examination of new type of grain-refinement process via martensitic microstructure-phase transformation in airplane Ti alloy

• Project/Area Number: 22760551
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Material processing/treatments
• Research Institution: Tohoku University
• Principal Investigator: MATSUMOTO Hiroaki 東北大学, 金属材料研究所, 助教 (40372312)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 航空機Ti合金 / マルテンサイト / 相分解 / 組織制御 / チタン合金 / マルテンサイト変態 / 低温熱処理 / 熱間加工 / 強度 / 室温延性

Research Abstract

Microstructural evolution during deformation-heat treatment process of martensite microstructure of airplane Ti alloy was evaluated in this work. Refined microstructure is obtained after cold working in α'-Ti-V-Al alloys and high-strengthening is achieved by combining the fine β precipitation under low temperature-heat treatment. Furthermore, homogeneous martensiticmicrostructure is found to be appeared by high speed deformation at more than 900℃ due to high accumulation of dislocations.

Research Products

• [Journal Article] "Enhancement of athermal α"martensitic transformation in Ti-10V-2Fe-3Al alloy due to high-speed hot deformation (2012)
  • Author(s): T.Akanuma, H.Matsumoto, S.Sato, A.Chiba, I.Inagaki, Y.Shirai, T.Maeda
  • Journal Title: Scripta Mater Volume: 67 Pages: 21-24
  • URL: http://dx.doi.org/10.1016/j.scriptamat.2012.03.011
• [Journal Article] Enhancement of athermal α”martensitic transformation in Ti-10V-2Fe-3Al alloy due to high-speed hot deformation (2012)
  • Author(s): T.Akanuma, H.Matsumoto, S.Sato, A.Chiba, I.Inagaki, Y.Shirai, T.Maeda
  • Journal Title: Scripta Materialia Volume: 67 Pages: 21-24
  • Peer Reviewed
• [Journal Article] Enhancement of athermal α" martensitic transformation in Ti-10V-2Fe-3Al alloy due to high-speed hot deformation (2012)
  • Author(s): T.Akanuma, H.Matsumoto, S.Sato, A.Chiba, I.Inagaki, Y.Shirai, T.Maeda
  • Journal Title: Scripta Materialia Volume: (未定)(Accepted in press) Issue: 1 Pages: 21-24
  • DOI: 10.1016/j.scriptamat.2012.03.011
  • Peer Reviewed
• [Presentation] 航空機用Ti-5Al-5Mo-5V-3Cr合金の高温変形挙動と組織変化 (2012)
  • Author(s): 赤沼俊之、松本洋明、千葉晶彦、稲垣育宏、白井義久、前田尚志
  • Organizer: 2012年春期(第150回)日本金属学会講演会
  • Place of Presentation: 会場:横浜国立大学常盤台キャンパス
  • Year and Date: 2012-03-29
• [Presentation] Ti-10V-2Fe-3Al合金の熱間加工後の微細組織形成とマルテンサイト変態
  • Author(s): 赤沼俊之、松本洋明、李云平、千葉晶彦、稲垣育宏、白井善久、前田尚志
  • Organizer: 2011春期日本金属学会講演会(講演会は東日本震災で中止、概要は発刊)