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Multiaxial Creep-fatigue criterion of Ni-base single crystal superalloys.

Research Project

Project/Area Number 07650124
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionRITSUMEIKAN UNIVERSITY

Principal Investigator

SAKANE Masao  Ritsumeikan University, Faculty of Sci, & Eng., Professor, 理工学部, 教授 (20111130)

Co-Investigator(Kenkyū-buntansha) OHNAMI Masateru  Ritsumeikan University, Faculty of Sci, & Eng., Professor, 理工学部, 教授 (60066587)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1996: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1995: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsHigh temperature / Superalloy / Single Crystal / Multiaxial stress / Creep-fatigue / Anisotropy / Elastic constant / Crystal slip theory / 単結晶超合金 / 多軸応力 / 結晶塑性 / 有限要素法
Research Abstract

Tension and torsion low cycle fatigue and that with tension strain hold-time tests were carried out using CMSX-2 single crystal superalloy at 1173K.Low cycle fatigue lives in torsion were far smaller than those in tension at the same Mises equivalent strain. The difference in fatigue lives due to loading mode was attributed to the anisotropy of elastic constant. The reduction in fatigue lives by introduction of 10 min hold-time did not depend on the loading mode.
Stress and strain cocnentration exists in actual gas turbine blade like air film cooling hole. Conventional elastic-plastic finite element method is not available to single crystal superalloys since single crystal superalloys have a crystallographic texture and deformation behavior is influenced by preferential slips of crystal. This study developed the finite element code available to the elastic-plastic deformation analysis of single crystal superalloys. The code takes account of cubic and octahedral slip systems. Material constants required to the analysis were determined using CMSX-4 single costal superalloy. The stress and strain concentration of a plate with a circular hole of single crystal was proved to differ that of isotropic materials.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 神田満: "単結晶超合金CMSX-2の高温多軸クリープ疲労" 第41期材料連合講演会. (発表予定). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 坂根政男: "結晶塑性理論に基づく単結晶超合金の弾塑性解析" 第41期材料連合講演会. (発表予定). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Kanda and M.Sakane: "Multiaxial Creep-Fatigue of CMSX-2 single Crystal Superalloy at High Temperature" Proceeding of 41th Japan Congress of Material Research. (to appear).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Sakane and M.Fujikawa: "Elastic-plastic Deformation Analysis of Single Crystal Superalloy Based on Crystal Plasticity" Proceedings of 41th Japan Congress of Material Research. (to appear).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 神田満: "単結晶超合金CMSX-2の高温多軸クリープ疲労" 第41期材料連合講演会. (発表予定).

    • Related Report
      1996 Annual Research Report
  • [Publications] 坂根政男: "結晶塑性理論に基づく単結晶超合金の弾塑性解材" 第41期材料連合講演会. (発表予定).

    • Related Report
      1996 Annual Research Report
  • [Publications] Mitsuru Kanda: "High Tenperathre Multiaxial LCF of Ni-base Single Crystal Siperalloy" Proc. Thermal Stresses '95. 481-484 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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