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Development of Testing Machine for Mechanical Properties at Ultra High Temperature using Impulse Electron Irradiation

Research Project

Project/Area Number 07555502
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field Structural/Functional materials
Research InstitutionOsaka University

Principal Investigator

UMAKOSHI Yukichi  Osaka University, Fac.of Engineering, Professor, 工学部, 教授 (00029216)

Co-Investigator(Kenkyū-buntansha) NAKANO Takayoshi  Osaka University, Fac.of Engineering, Research Associate, 工学部, 助手 (30243182)
SHIBAYANAGI Toshiya  Osaka University, Fac.of Engineering, Joining and Welding Research Institute, As, 接合科学研究所, 助教授 (10187411)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1996: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywordselectron irradiation / mechanical property / ultra high temperature / strength / intermetallics / ductility / fracture / silicide / 耐熱材料 / 変形
Research Abstract

Testing machine for mechanical properties of ultra high-temparture refractory materials has been developed. Special vacuum chamber was built for impulse electron bombardment system. Electron irradiation was carried out at 30kV in vacuum. To hold the specimen during mechanical testing, ceramic holder was used. The maximum temperature which was obtained using this heating system was around 2000゚C.High heating rate of 500゚C/min was obtained. The thermal stability during mechanical test was less than 2゚C.Since test specimens of metallic materials were directly heated by electron irradiation, mechanical test at ultra high temperature could be done. For ceramic specimens the specimen surface was convered by tantalum tube and then high temperature was realozed. The thermal gradient between upper and bottom sides of specimens was very small. The displacement of specimens during tesile or comression tests was measured using laser light. Mechanical properties of transition metal silicides such as MoSi_2 and NbSi_2 which are attractive candidates for refractory materials operating around 2000゚C were investigated by means of this testing machine. MoSi_2 and NbSi_2 showed anomalous strengthening above 1200゚C and the anomalous peak was shifted to higher temperture by addition of small amounts of third element. Mechanical properties of TiAl alloys were also investigated. The temperature dependence of strength and ductility of these alloys was easily obtained using this machine.

Report

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

    (15 results)

All Other

All Publications (15 results)

  • [Publications] T. Nakano: "Plastic behavior of TiAl PST crystals under cyclic loading conditions" Intermetallics. 4・7. 571-579 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T. Nakano: "Effect of chemical ordering on the deformation mode of Al-rich TiAl single crystals" Phil. Mag. A. 74・1. 251-268 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T. Shibayanagi: "Grain rotation of Ni_3Al" Scripta Mater.34・9. 111-120 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y. Umakoshi: "High temperature deformation of eutectic CoSi/CoSi_2 alloysss grown by a floating zone method" Mechanical Properties and Phase Transformations of Malti-Phaso Intermetallic Alloys. 171-179 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Nakano: "Effect of order-disorder transition on plastic anomaly of Ti3Al single crystals deformed by prism slip" Intermetallics. Vol.4, No.7. 571-579 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Nakano: "Effcet of chemical ordering on the deformation mode of Al-rich TiAl single crystals" Phil.Mag.A. Vol97, No.1. 251-268 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Shibayanagi: "Grain rotaion of Ni3Al" Scrtipta Meter. Vol.34, No.9. 111-120 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Umakoshi: "High temperature deformation of eutectic CoSio/CoSi2 alloys grown by a floating zone method" Mechanical Properties and Phase Transfoormations of Multi-Phase Intermetallics Alloys. 171-179 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Nakano: "Effect of order-disorder transition on plastic anomaly of Ti_3Al singles deformed by prism slipe" Intermetallics. 4・7. 571-579 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Nakano: "Effect of chemical ordering on the deformation mode of Al-rich TiAl single crystals." Phil.Mag.A. 74・1. 251-268 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Shibayanagi: "Grain rotation of Ni_3Al" Scripta Mater.34・9. 111-120 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Umakoshi: "High temperature deformation of eutectic CoSi/CoSi_2 alloysss grown by a floating zone method" Mechanical Properties and Phase Transformations of Malti-Phaso Intermetallic Alloys. 171-179 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Nakano,E.Yanagisawa and Y.Umakoshi: "Effect of Addition of B-phase Stabilizing Elements(Nb,Mo and V)on plastic Behaviour of fiz Al single crystals." ISIJ Inter.35. 900-907 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.Umakoshi,T.Nakano,T.takezoe and E.Yanagisawa: "High Temperature Deformation of Eutectic CoSi/CoSi_2Alloys Grown by a Floating Zone Method." Mechanical Properties and Phase Transformations of Multi-phase Intermetallic Alloys(TMS). 171-179 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.Umakoshi,T.Nakano and H.Y.Yasuda: "The Role of Lamellor Structure in the Plastic Behavior of TiAl Alloys" Mechanical Properties and Phase Transformation of Multi-phase intermetallic Alloys(TMS). 151-169 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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