• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Stress and Temperature Dependence of High Temperature Creep Resistance in Intermetallic Compound TiAl

Research Project

Project/Area Number 04650644
Research Category

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

Allocation TypeSingle-year Grants
Research Field 金属材料(含表面処理・腐食防食)
Research InstitutionTokyo Institute of Technology

Principal Investigator

KIKUCHI Makoto (1993)  Tokyo Institute of Technology, Faculty of Engineering Professor, 工学部, 教授 (30089817)

松尾 孝 (1992)  東京工業大学, 工学部, 助教授 (10089823)

Co-Investigator(Kenkyū-buntansha) MATSUO Takashi  Tokyo Institute of Technology, Faculty of Engineering Professor, 工学部, 教授 (10089823)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1992: ¥800,000 (Direct Cost: ¥800,000)
KeywordsINTERMETALLIC COMPOUND / Ti-50Al / CREEP CURVE / STRESS ECPONENT OF MINIMUM CREEP RATE / ACTIVATION ENERGY FOR CREEP / DYNAMIC RECRYSTALIZATION / MINIMU CREEP RATE / SUBGRAIN / 転位下部組織 / 活性化エネルギー / クリープ / 最小クリープ速度の応力指数
Research Abstract

Constant creep tests in the stress range of 100 to 300 MPa were conducted at 1123 K using the full size specimens of Ti-50 at% Al heat treated at 1473 K for 6*10^5s. The stress dependence of the stress exponent of the minimum creep rate, called as n value, were investigated. The specimens crept at certain stress levels were interrupted at the time showing the minimum creep rate. The stress dependence of the dislocation substructures subjected to creep deformation were examined using the transmission electron microscopy. Following conclusions were reached.
1)The creep curves of TiAl exhibited no steady state stage. Thus, they consist of a transient stage and an accelerating creep stage. The latter occupied more than 90 pct of the rupture life.
2)The stress exponent of the minimum creep rate, n value, remains constant and equals to 3 less than 150MPa. In the stress range of 150 to 300 MPa, n value increase up to 8 with increasing the stress levels.
3)Under the stresses of less than 150 MPa, dynamically recrystalized grains can not be observed at the minimum creep rate stage. In the stress range of 150 to 300 MPa, however, dynamically recrystalized grains form along the grain boundaries.
4)linear increase of internal stress is obtained up to 150 MPa, so the ratio of the internal stress to the applied stress, sigma_i/sigma_a, remains constant value of 0.9. Under the stress of more than 150 MPa, sigma_i/sigma_a decreases with increasing the applied stress.

Report

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

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 松尾 孝: "γ TiAl合金の高温クリープ挙動" 金属間化合物共同研究会講演概要集-金属間化合物のクリープ-. 5-8 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 間篠謙一,寺田芳弘,松尾孝,菊池實: "TiAlの高温クリープにおける最小クリープ速度の結晶粒径依存性" 学振123委研究報告. 34. 205-213 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 間篠謙一,具明曾,松尾孝,菊池實: "TiAlの高温クリープ変形における最小クリープ速度の応力依存性" 学振123委研究報告. 33. 49-57 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 具明曾,間篠謙一,松尾孝,菊池實: "TiAlのクリープの活性化エネルギの応力依存性" 学振123委研究報告. 33. 59-67 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 具明曾,松尾孝,菊池實: "TiAl鋳造材の高温クリープ挙" 学振123委研究報告. 31. 253-266 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.KOO, T.MATSUO, M,KIKUCHI: "Dislocation Substructeres Developed during High Tempereture Creep in TiAl" Proc.Intern.Sympo.Intermetalic Compounds-Structure and Mechanical Properties (JIMIS-6). 519-523 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Matsuo: "High Temperature Creep Behavier in gamma TiAl Alloys." Proc.12th.Sympo.Intermetallic Compounds. 5-8 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Mashino, Y.Terada, T.Matsuo and M.Kikuchi: "Grain Size Dependence of the Minimum Creep Rate in High Temperature Creep of TiAl." 123rd Committee on Heat Resisting Metals and Alloys Rep.34-2. 205-213 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Mashino, M.Koo, T.Matsuo and M.Kikuchi: "Stress Dependence of the Minimum Creep Rate in High Temperature Creep of TiAl." 123rd Committee on Heat Resisting Metals and Alloys Rep.33-1. 49-57 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Koo, K.Mashino, T.Matsuo and M.Kikuchi: "Stress Dependence of Activation Energy for Creep in TiAl." 123rd Committee on Heat Resisting Metals and Alloys Rep.33-1. 59-67 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Koo, T.Matsuo and M.Kikuchi: "Dislocation Substructures Developed during High Temperature Creep in TiAl." Proc.Intern.Sympo.Intermetallic Compounds, Structure and Mechanical Properties. JIMIS-6. 519-523

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Koo, T.Matsuo and M.Kikuchi: "High Temperature Creep Behavior of As-Cast Materials of TiAl." 123rd Committee on Heat Resisting Metals and Alloys Rep.31-2. 253-266 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Koo, T.Matsuo and M.Kikuchi: "Dislocation Substructures in TiAl Subject to High Temperature Creep Deformation." 123rd Committee on Heat Resisting Metals and Alloys Rep.30-3. 307-319 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 間篠 謙一: "TiAlの高温クリープにおける最小クリープ速度の結晶粒径依存性" 耐熱金属材料第123委員会研究報告. 34. 205-213 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 間篠 謙一,具 明会,松尾 孝,菊池 實: "TiAlの高温クリープ変形における最小クリープ速度の応力依存性" 日本学術振興会耐熱金属材料第123委研究報告. 33. 49-57 (1992)

    • Related Report
      1992 Annual Research Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi