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Crystallographic Fracture Mechanics Study on Creep-Fatigue Small Crack Propagation in Ni-base Superalloyas at High Temperatures

Research Project

Project/Area Number 04650080
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 材料力学
Research InstitutionNagaoka University of Technology

Principal Investigator

OKAZAKI Masakazu  Nagaoka University of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (00134974)

Co-Investigator(Kenkyū-buntansha) SATOH Toyoichik  Nagaoka Univarsity of Technology, Research Associate, 技術研究本部, 研究員 (60225977)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1992: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsNi-Base Superalloys / Small Crack Propagation / Microstructure / Oxidation / Long Crack / Temperature / Elastic Compliance / Crack Closure / γ'強化析出相 / 微小疲労き裂進展 / 弾性係数 / き裂開閉口 / 単結晶Ni基超合金 / 多結晶Ni基超合金 / 微小疲労き裂の進展 / 破壊モード / 強度特性の不均一性 / 結晶破壊力学
Research Abstract

Small fatigue crack growth behavior was investigated in three kinds of Ni-base superalloys at high temperatues ; a single crystal alloy, a directionally-solidified alloy and a pollycrystalline alloy. The effects of temperature and microstructures were also studies base on the muasurement of the crack openig and closing behavior.
The main conclusions obtained are summarized as follows :
(1) The small fatigue crack growth behavior in Ni-base superalloys are sensitive to the microstructures, such as grain boundaries, crystallographic slip plane and slip direction, and the size of gamma'precipitates. The intrinsic small fatigue crack growth resistance, in which the temperature dependence of elastic compliance and that of crack closure level are taken into account, decreases with temperature. The dissolution of gamma'precipitates by environmental effect closely contributes to the above temperature dependence.
(2) The information on the long crack growth are not always applied to thesmall crack. The small cracks propagate even at lower stress intensity factor than the long crack threshold level. The similar phenomena are often found in other kinds of materials, such as the metal-matrix composites materials. These experimental evidences indicate the importance of the investigation of small crack growth behavior.
(3) The diffecence between the long and small crack growth rates in the single crystal alloy are compensated by the crack closure phenomenon, but not in the polycrystalline alloy. The inhomogenity of strength properties as well as the difference of the fracture mode are closely related to the above difference between the long and small cracks.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] 岡崎正和,大島繁,能美伸一郎: "き裂開閉口測定に基づくNi基超合金の高温における微小疲労き裂進展の調査" 材料. 43 印刷中. (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎正和,佐藤隆行,能美伸一郎: "高温用非接触型微小変位計の試作とNi基超合金の微小疲労き裂進展への適用" 日本材料学会第41期学術講演会前刷集. 10-12 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎正和,大島繁,能美伸一郎: "Ni基超合金の微小疲労き裂進展とき裂開閉口" 日本機械学会平成4年度材料力学講演会論文集. 552-554 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎正和,大島繁,能美伸一郎: "き裂開閉口測定に基づくNi基超合金の高温における微小疲労き裂進展" 日本材料学会第30回高温強度記念シンポジウム前刷集. 79-84 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎正和,大島繁,能美伸一郎: "Ni基超合金の高温微小疲労き裂進展の相似則崩壊に関する微視組織学的アプローチ" 日本機械学会第70期通常総会講演会論文集. 172-174 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎正和,萩野崇,樋口亮介,三浦恒正: "AlN粒子分散強化複合材料の高温微小疲労き裂発生と伝ぱ" 日本材料学会第42期学術講演会前刷集. 108-110 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎正和 新野栄司: "微小疲労き裂進展におけるStage I伝ぱからStage II伝ぱへの遷移に関する一検討" 日本機械学会平成5年度材料力学講演会論文集. 73-74 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎正和,萩野崇,水谷淳之介: "ウィスカ強化および粒子分散強化複合材の高温微小疲労き裂の発生と伝ぱ" 日本材料学会第41回高温強度シンポジウム前刷集. 74-78 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎正和,山田英実,能美伸一郎: "単結晶Ni基超合金の微小疲労き裂進展に及ぼす温度の影響" 日本機械学会平成6年度総会講演会論文集. (発表予定). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎正和,今井哲也,佐藤隆行,能美伸一郎: "単結晶Ni基超合金の高温疲労における微小き裂の進展" 材料. 41. 1261-1267 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI, T.IMAI, T.SATOH, S.NOHMI: "Fatigue Small Crack Growth in A Single Crystal Ni-Base Super alloy at High Temperature" Jap.Soc.Mat.Sci.41. 1261-1267 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI, S.OHSHIMA, S.NOHMI: "Study on Small Fatigue Crack Growth Behavior Based on Measurement of Crack of Upening-Closing Behavior in Ni-Base Superalloys at High Temperature" Jap.Soc.Mat.Sci.43(in press). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI T.SATOH S.NOHMI: "Developement of Crack Opening-Closing Measurement System at High Temperature and The Application to Small Fatigue Crak Growth in Ni-Base Superalloys." Proc.41-th Ann. Meeting, JSMS. 10-12 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI, S.OHSHIMA, S.NOHMI: "Small Fatigue Crack Growth and Crack Opening-Closing Behavior in A Ni-Base Superalloy" Proc.Ann. Meeting, JSMS. 552-554 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI, S.OHSHIMA, S.NOHMI: "Investigation of Small Fatigue Crack Growth in Directionally-Solidified Ni-Base Superalloy Based on Crack Opening Closing Measurement at High Temperature" Proc.30-th High Temp.Strength, JSMS. 79-84 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI, S.OHSHIMA, S.NOHMI: "Microstructural Approach on Dissimilitude of High Temperature Fatigue Small Crack Growth In Ni-Base Superalloys." Proc.Ann.Meeting JSME. 172-174 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI, T.HAGINO.T.MIURA: "Small Fatigue Crack Initiation and Propagation in AIN Particulate Reinforced Composite Material at High Temperature." Proc.42-th Ann. Meeting, JSMS. 108-110 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI, E.NIINO: "Approach onb A Basic Question On Transition from Stage I to Stage II Growth of Fatigue Small Crack" Proc.Ann. Meeting, JSME. 73-74 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI, T.HAGINO, J.MIZUTANI: "Fatigue Small Crack Initiation and Propagation in Whisker Reinforced and Particulate Reinforced Aluminum Alloys at High Temperature." Pro.41-th High Temp. Strength JSMS. 74-78 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.OKAZAKI, H.YAMADA, S.NOHMI: "Effect of Temperature on Small Fatigue Crack Growth In A Single Crystal Ni-base Superalloy." Proc.Ann. Meeting, JSME. (to be appear). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岡崎 正和,今井 智也,佐藤 隆行,能美 伸一郎: "単結晶Ni基超合金の高温疲労における微小き裂の進展" 材料. 41. 1261-1267 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Masakazu Okazaki Tetsuya IMai Shin-Ichiroh Nohmi: "Naturally Initiating Fatigue Small Crack Growth in A Single Crystal Ni-Base Superalloy at Elevated Temperature" Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials-3 (Ed.K.T.Rie,Elsevier Applied Science Publisher). 3. 539-544 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 岡崎 正和,佐藤 隆行,能美 伸一郎: "Ni基超合金の微小疲労き裂進展とき裂開閉口" 日本機械学会材料力学部門講演会前刷集(NO.920-72). 552-553 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 岡崎 正和,佐藤 隆行,能美 伸一郎: "高温用非接触型微小変位計の試作とNi基超合金の微小疲労き裂進展への適用" 日本材料学会第40期講演会前刷集. 10-12 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 岡崎 正和,大島 繁,能美 伸一郎: "き裂開閉口測定に基づくNi基超合金一方向凝固材の微小疲労き裂伝ぱの調査" 日本材料学会第30回高温強度シンポジウム前刷集. 79-83 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 岡崎 正和,大島 繁,能美 伸一郎: "Ni基超合金の高温疲労微小き裂進展の相似則崩壊に関する微視組織学的アプローチ" 日本機械学会第70期総会講演会前刷集. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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