Gas Turbine's In-service Stress Detection based on Microstructural Changes of Single Crystal Ni-Base Superalloy

2008 Fiscal Year Final Research Report

• Project/Area Number: 19860036
• Research Category: Grant-in-Aid for Young Scientists (Start-up)
• Allocation Type: Single-year Grants
• Research Field: Materials/Mechanics of materials
• Research Institution: Nagaoka University of Technology
• Principal Investigator: SAKAGUCHI Motoki Nagaoka University of Technology, 工学部・機械系, 助教 (60452083)
• Project Period (FY): 2007 – 2008
• Keywords: Ni基超合金 / 自己組織化 / モニタリング / 寿命延伸 / 残留応力

Research Abstract

本研究では、優れた高温強度を持つ単結晶Ni基超合金の組織形態変化現象に焦点を当て、その現象を意図的に発現させる実験を様々な条件下で行うとともに、発現した組織変化を数的表示するための評価法の開発、現象を支配する駆動力とメカニズムの解明を通し、形態変化現象を積極的に利用した「ガスタービン高温部材の寿命延伸技術」の根幹を担う基礎的事象を学術的に明らかにした.

Research Products

• [Journal Article] Low Cycle and Thermo-Mechanical Fatigue of Friction-Welded IN718/MarM247 Dissimilar Joint (2008)
  • Author(s): M.Sakaguchi, A.Sano, T.H.Tra, M.Okazaki, M.Sekihara
  • Journal Title: J. Solid Mech. & Mater. Eng Vol.2 Pages: 1508-1516
  • Peer Reviewed
• [Journal Article] Creep-Fatigue and Thermo -Mechanical Fatigue of Friction-Welded IN718 / MarM247 Dissimilar Joint (2008)
  • Author(s): M.Okazaki, M.Sakaguchi, T.H.Tra, M. Sekihara
  • Journal Title: Superalloys 2008 Pages: 221-228
  • Peer Reviewed
• [Journal Article] A New Analytical Method of γ/γ' Morphology in Single Crystal Ni Base Superalloys : For New Orientation of Damage and Remaining Life Assessment (2008)
  • Author(s): M.Sakaguchi, M.Okazaki
  • Journal Title: Superalloys 2008 Pages: 873-880
  • Peer Reviewed
• [Journal Article] Thermo -mechanical fatigue failure of a single crystal Ni-base superalloy (2008)
  • Author(s): M.Okazaki, M.Sakaguchi
  • Journal Title: Int. J. Fatigue Vol.30 Pages: 318-323
  • Peer Reviewed
• [Journal Article] Effect of Microstructure of Thermo-Mechanical and Isothermal Low cycle Fatigue Failures of a Single Crystal Ni-Base Superalloy (2007)
  • Author(s): M.Sakaguchi, M.Okazaki
  • Journal Title: Key Eng. Materials Vol.353 Pages: 491-494
  • Peer Reviewed
• [Journal Article] Fatigue Life Evaluation of a Single Crystal Ni-base Superalloy, Accompanying with Change of Microstructural Morphology (2007)
  • Author(s): M.Sakaguchi, M.Okazaki
  • Journal Title: Int.J.Fatigue Vol.29 Pages: 1959-1965
  • Peer Reviewed
• [Presentation] 単調負荷により生じる超合金組織の形態変化とその温度依存性 (2008)
  • Author(s): 阪口基己
  • Organizer: 日本材料学会第46回高温強度シンポジウ
  • Place of Presentation: 北海道登別市
  • Year and Date: 2008-12-05
• [Presentation] 実機使用ガスタービン翼の局所き裂進展特性評価 (2008)
  • Author(s): 佐佐木洋輔
  • Organizer: 第52回日本学術会議材料工学連合講演会
  • Place of Presentation: 京都府京都市
  • Year and Date: 2008-10-22
• [Presentation] Early Growth of Creep-Fatigue Small Crack in Advanced Ni-Base Sueralloys (2008)
  • Author(s): M.Sakaguchi
  • Organizer: 5^<th> International Conference on Creep, Fatigue and Creep-Fatigue Interarion
  • Place of Presentation: Kalpallam, India
  • Year and Date: 2008-09-26
• [Presentation] A New Analytical Method of γ/γ' Morphology in Single Crystal Ni-Base Superalloys : For New Orientation of Damage and Remaining Life Assessment (2008)
  • Author(s): M.Sakaguchi
  • Organizer: Superalloys 2008
  • Place of Presentation: Champion, USA
  • Year and Date: 2008-09-16
• [Presentation] ν/γ' Morphological Changes in Single Crystal Ni-Base Superlloys under Cyclic Loadings ; A New Morphological Analysis for Fatigue Damage Detection (2008)
  • Author(s): M.Sakaguchi
  • Organizer: 6^<th> International Conference on Low Cycle Fatigue
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2008-09-16
• [Presentation] Strength of MarM247 / IN718 Dissimilar Metals Joint under Creep-Fatigue and Thermo-Mechanical Fatigue Loading (2008)
  • Author(s): M.Okazaki
  • Organizer: 6^<th> International Conference on Low Cycle Fatigue
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2008-09-15
• [Presentation] Low Cycke Fatigue and Thermo-Mechanical Fatigue of Friction Welded Dissimilar Superalloys Joint (2008)
  • Author(s): M.Sakaguchi
  • Organizer: 2008 M&M International Symposium for Young Researchers
  • Place of Presentation: 和歌山県西牟婁郡
  • Year and Date: 2008-03-09
• [Presentation] 種々の負荷により生じる超合金組織の形態変化と高温力学場の検出技術への応用 (2007)
  • Author(s): 阪口基己
  • Organizer: 第51回日本学術会議材料工学連合講演会
  • Place of Presentation: 京都府京都市
  • Year and Date: 2007-11-29
• [Presentation] Hybrid Composite Model for High-Temperature Fatigue Life Prediction in Single Crystal Ni-Based Superalloy (2007)
  • Author(s): M.Sakaguchi
  • Organizer: 6th Japan-China Bilateral Symposium on High Temperature Strength of Materials
  • Place of Presentation: 宮城県仙台市
  • Year and Date: 2007-08-22
• [Presentation] Cluster-Methodを用いた単結晶Ni基超合金の微細組織形態に対する定量評価 (2007)
  • Author(s): 阪口基己
  • Organizer: 日本材料学会第56期学術講演会
  • Place of Presentation: 愛知県名古屋市
  • Year and Date: 2007-05-20