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Explication of the degradation mechanism of the strength of heat-resistant alloys under random loading at elevated temperatures and the establishment of the prediction method of their lifetime

Research Project

Project/Area Number 21F50350
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section外国
Review Section Basic Section 18010:Mechanics of materials and materials-related
Research InstitutionTohoku University

Principal Investigator

三浦 英生  東北大学, 工学研究科, 教授 (90361112)

Co-Investigator(Kenkyū-buntansha) WANG RUNZI  東北大学, 工学(系)研究科(研究院), 外国人特別研究員
Project Period (FY) 2021-11-18 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2022: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2021: ¥400,000 (Direct Cost: ¥400,000)
Keywords高温強度 / 粒界割れ / クリープ疲労損傷 / 結晶品質 / 電子線後方散乱回折 / Strength of Materials / Heat-resistant Alloy / Creep-fatigue Damage / EBSD Analysis / Intergranular cracking
Outline of Research at the Start

The main objectives of this research are; 1) Clarification of the acceleration mechanism of the degradation of materials under creep-fatigue loading at elevated temperatures, and 2) Establishment of the quantitative evaluation method of the damage of the materials under random load conditions.

Outline of Annual Research Achievements

The main objectives of this research are 1) Clarification of the acceleration mechanism of the degradation of materials under creep-fatigue loading at elevated temperatures, and 2) Establishment of the quantitative evaluation method of the damage of the materials under random load conditions. Original small dumbbell-shape specimens were manufactured for both the observation of the degradation process under the distribution of the applied load and the direct observation of the change of the local crystallinity of the alloy in a scanning electron microscope. The degradation process of the crystallinity of the representative heat-resistant alloy, Ni-base superalloy, under creep-fatigue loading at elevated temperatures was monitored continuously by using our original intermittent micro tensile test method with electron microscopy. The degradation process of the crystallinity and strength of the material was continuously observed, and it was explicated by applying the modified Arrhenius equation by considering the effect of mechanical stress on the local decrease in the activation energy of atomic diffusion. it was also found that the accumulation of vacancies and dislocations was accelerated only around grain boundaries and thus, the initiation time of intergranular cracking became shorter when the strain rate during loading and unloading became faster. The main reason for the acceleration was found to be the activation of viscoelasticity of the alloy at the elevated temperature.

Research Progress Status

令和4年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和4年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (17 results)

All 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (9 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 9 results,  Open Access: 9 results) Presentation (5 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] 華東理工大学(中国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] 華東理工大学(中国)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] A data-driven roadmap for creep-fatigue reliability assessment and its implementation in low-pressure turbine disk at elevated temperatures2022

    • Author(s)
      Run-Zi Wang, Hang-Hang Gu, Kai-Shang Li, JI Wang, Xiao-Wei Wang, Miura Hideo, Xian-Cheng Zhang, Shan-Tung Tu
    • Journal Title

      Reliability Engineering & System Safety

      Volume: 225 Pages: 108523-108523

    • DOI

      10.1016/j.ress.2022.108523

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Oxidation-involved life prediction and damage assessment under generalized creep-fatigue loading conditions based on engineering damage mechanics2022

    • Author(s)
      Run-Zi Wang, Xian-Cheng, Zhang, Hang-Hang, Gu, Kai-Shang Li, Jian-Feng Wen, Hideo Miura, Ken Suzuki, Shan-Tung Tu
    • Journal Title

      J. of Materials Research and Technology

      Volume: 23 Pages: 114-130

    • DOI

      10.1016/j.jmrt.2022.12.094

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Establishment of unified creep-fatigue life prediction under various temperatures and investigation of failure physical mechanism for Type 304 stainless steel2022

    • Author(s)
      Le Xu, Run-Zi Wang, Lei He, Xian-Cheng Zhang, Shan-Tung Tu, Hideo Miura, Takamoto Itoh
    • Journal Title

      Fatigue & Fracture of Engineering Materials & Structures

      Volume: 45 Issue: 10 Pages: 3086-3101

    • DOI

      10.1111/ffe.13794

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evaluation of fatigue and creep-fatigue damage levels on the basis of engineering damage mechanics approach2022

    • Author(s)
      Li Sun, Xian-Cheng Zhang, Run-Zi Wang, Xiao-Wei Wang, Shan-Tung Tu, Ken Suzuki, Hideo Miura
    • Journal Title

      Journal of Fatigue

      Volume: 166 Pages: 103337-103337

    • DOI

      10.1016/j.ijfatigue.2022.107277

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A dual-scale modelling approach for creep-fatigue crack initiation life prediction of holed structure in a nickel-based superalloy2022

    • Author(s)
      Kai-Shang Li, Lv-Yi Cheng, Yilun Xu, Run-Zi Wang, Yong Zhang, Xian-Cheng Zhang, Shan-TungTu, Hideo Miura
    • Journal Title

      International Journal of Fatigue

      Volume: 154 Pages: 106522-106522

    • DOI

      10.1016/j.ijfatigue.2021.106522

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Multi-stage dwell fatigue crack growth behaviors in a nickel-based superalloy at elevated temperature2021

    • Author(s)
      Ji Wang, Run-Zi Wang, Xian-Cheng Zhang, You-Jun Ye, Yan Cui, Hideo Miura, Shan-TungTu
    • Journal Title

      Engineering Fracture Mechanics

      Volume: 253 Pages: 107859-107859

    • DOI

      10.1016/j.engfracmech.2021.107859

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cycle-dependent creep-fatigue deformation and life predictions in a nickel-based superalloy at elevated temperature2021

    • Author(s)
      Lv-Yi Cheng, Run-Zi Wang, Ji Wang, Shun-Peng Zhu, Peng-Cheng Zhao, Hideo Miura, Xian-Cheng Zhang, Shan-Tung Tu
    • Journal Title

      International Journal of Mechanical Sciences

      Volume: 206 Pages: 106628-106628

    • DOI

      10.1016/j.ijmecsci.2021.106628

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A crystal plasticity-based approach for creep-fatigue life prediction and damage evaluation in a nickel-based superalloy2021

    • Author(s)
      Kai-Shang Li, Run-Zi Wang, Guang-Jian Yuan, Shun-Peng Zhu, Xian-Cheng Zhang, Shan-Tung Tu, Hideo Miura
    • Journal Title

      International Journal of Fatigue

      Volume: 143 Pages: 106031-106031

    • DOI

      10.1016/j.ijfatigue.2020.106031

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Semi-quantitative creep-fatigue damage analysis based on diffraction-based misorientation mapping and the correlation to macroscopic damage evolutions2021

    • Author(s)
      Run-Zi Wang, Lv-Y iCheng, Shun-Peng Zhu, Peng-Cheng Zhao, Hideo Miura, Xian-Cheng Zhang, Shan-TungTu
    • Journal Title

      International Journal of Fatigue

      Volume: 149 Pages: 106227-106227

    • DOI

      10.1016/j.ijfatigue.2021.106227

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Creep-fatigue reliability analysis integrated with surrogate modelling: application on industrial case studies2022

    • Author(s)
      Runzi Wang
    • Organizer
      International Symposium on Structural Integrity (ISSI2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Creep-fatigue reliability analysis integrated with surrogate modelling: application on industrial case studies2022

    • Author(s)
      Run-Zi Wang
    • Organizer
      ASME International Mechanical Engineering Congress and Exposition (IMECE2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Creep-fatigue life design and reliability analysis in high-temperature components2021

    • Author(s)
      Run-Zi Wang
    • Organizer
      International Symposium on Structural Integrity
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Acceleration Mechanism of the Degradation of the Strength of Heat-Resistant Alloys under Creep-Fatigue Loading at Elevated Temperatures2021

    • Author(s)
      Hideo Miura
    • Organizer
      International Symposium on Structural Integrity
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Ni基超合金GH4169のδ相析出による高温粒界強度劣化加速機構の検討2021

    • Author(s)
      中山 歩美
    • Organizer
      日本機械学会東北支部第57回総会講演会
    • Related Report
      2021 Annual Research Report
  • [Remarks] 東北大学 三浦・鈴木研究室

    • URL

      http://www.miura.rift.mech.tohoku.ac.jp

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report

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Published: 2022-02-08   Modified: 2024-03-26  

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