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Improvement of Toughness in B2-type Intermetallic Compounds

Research Project

Project/Area Number 01550544
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 InstitutionTohoku University

Principal Investigator

TAKASUGI Takayuki  Tohoku University, Institute for Materials Research, Associate professor, 金属材料研究所, 助教授 (20108567)

Co-Investigator(Kenkyū-buntansha) YOSHIDA Mitsuhiko  Miyagi National College of Technology, Associate Professor, 助教授 (40042254)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1990: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1989: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsIVa-VIII compound / Intermetallic compound / B2 type / CoTi / High temperature deformation / Superlattice dislocation / Phase stability / CoHf / 耐熱材料
Research Abstract

The present study aimed to understand the strength anomaly and to attempt to improve the toughness of B2-type intermetallic compounds. The following results were obtained.
1. Whether strength anomaly is operative was observed on CoTi, CoZr, CoHf, NiTi and FeTi intermetallics. Result showed that CoTi, CoZr, Colif and NiT! displayed the strength anomaly while Fe Ti did not displayed. Tis strength anomaly was examined also in the pseudobinary alloys FeTI-CoTi-NiTi.
2. Operative slip systems iri CoTi single crystals were determined by means of optical microscopy and transmission electron microscopy and shown to be(011)<001>in wide range of temperatures and orientations. Also, TEM weak observation indicated that<001>dislocation was not dissociated into partials.
3. It was proposed that strength anomaly is due to core structure of a<001>dislocation.
4. A number of B2-type intermetallic compounds were reviewed in terms of operative slip systems and thereby anisotropy of elastic parameters and APB energy were shown to be important.

Report

(3 results)
  • 1991 Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] T.Takasugi: "Plastic Flow of B2-type CoTi Single Crytals" Philosophical Magazine A. 61. 785-880 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M.H.Yoo: "Slip Modes in B2-type Intermetallic Alloys" Materials Transaction,JIM. 31. 435-442 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Takasugi: "Anomalous Temperature Dependence of the Yield Strength in IVa-VIII Intermetallic Compounds with B2 Stracture" Journal of Materials Science. 26. 2941-2948 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Takasugi: "The Effect of Temperature and Orientation on Dislocation Microstructure in B2-type CoTi Single Crystals" Philosphical Magazine A. 65. 29-40 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M.Yoshida: "Deformation Microstructures in B2-type CoTi Single Crystals" MRS Symp.Pablication. 213. 273-278 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Takasugi: "Strength anomaly in IVa-VIII B2-type Intermetallics" Proc.of Inter.Symp.on Intermetallic Compounds-Structure and Mechanical Properties-. 615-620 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Takasugi, K. Tsurisaki, O. Izumi and S. Ono: "Plastic Flow of B2-type CoTi Single Crystals" Philosophical magazine A. 61. 785-880 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. H. Yoo, T. Takasugi, S. Hanada and O. Izumi: "Slip Modes in B2-type Intermetallic Alloys" Materials Transaction JIM. 31. 435-442 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Takasugi, M. Yoshida and O. Izumi: "Anomalous Temperature Dependence of the Yield Strength in IVa-VIII Intermetallic Compounds with B2 Structure" Journal Materials Science. 26. 2941-2948 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Takasugi, M. Yoshida and O. Izumi: "The Effect of Temperature and Orientation on Dislocation Microstructure in B2-type CoTi Single Crystals" Philosophical Magazine A. 65. 29-40 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Yoshida and T. Takasugi: "Deformation Microstructure in B2-type CoTi Single Crystals" MRS Symp. Publication. 213. 273-278 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Takasugi, M. Yoshida and S. Hanada: "Strength Anomaly in IVa-VIII B2-type Intermetallics" Proc. of Inter. Symp. on Intermetallic Compounds - Structure and Mechanical Properties -. 615-620 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Takasugi: "Plastic Flow of B2ーtype CoTi Single Crystals" Philosophical Magazine A. 61. 785-800 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] M.H.Yoo: "Slip Modes in B2ーtype Intermetallic Alloys" Materials Transaction,JIM. 31. 435-442 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Takasugi: "Anomalous Temperature Dependence of the Yield Strength in IVaーVIII Intermatallic Compounds with B2 Structure" Journal of Materials Science. 26. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Takasugi: "The Ellect of Temperature and Orientation on Dislocation Microstructure in B2ーtype CoTi Single Crystals" Philosophical Magazine A. 62. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] M.Yoshida: "Deformation Microstructures in B2ーtype CoTi Single Crystals" MRS Symp.Publication. 213. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Takasugi: "Plastic Flow of B2-type CoTi Single Crystals" Thil.Mag.A. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Takasugi: "Anomalous Temperature Dependence of the Yield Strength in IVa-VIII Intermetallic Compound with B2 Structure" Journal of Materials Science. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] M.H.Yoo: "Slip Modes in B2-type Intermetallic Alloys" Materials Transaction,JIM. (1990)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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