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Diffusionless Solid-Solid Phase Transformations and Associated Mechanical Functions

Research Project

Project/Area Number 08455292
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical properties of metals
Research InstitutionOsaka University

Principal Investigator

SABURI Toshio  Osaka University, Faculty of Engineering, Professor, 工学部, 教授 (40029020)

Co-Investigator(Kenkyū-buntansha) FUKUDA Takashi  Osaka Univ., Faculty of Engineering, Assistant, 工学部, 助手 (50228912)
KAKESHITA Tomoyuki  Osaka Univ., Faculty of Engineering, Associate Professor, 工学部, 助教授 (90127209)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥6,700,000 (Direct Cost: ¥6,700,000)
Fiscal Year 1997: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1996: ¥6,200,000 (Direct Cost: ¥6,200,000)
Keywordsmartensitic transformation / shape memory / Ti-Ni / aging / two-way / spontaneous shape change / R-phase / actuator / Ti-Ni-Cu
Research Abstract

We intended to make clear the strength of the two-way shape memory which is known as "all-round shape memory effect (ARSME)" by obtaining a quantitative data of the performance of the "ARSME" against an externally applied stress. For this purpose, tesile deformation is more convenient than bending. Therefore, we adopted tensile method instead of bending method in aging treatment aiming for preferential alignment of the particles of Ti3Ni4 and also in testing of the performance. A Ti-51Ni (at%) alloy was prepared by induction melting and it was hotrolled. Tensile test specimens were cut from the rolled sheet. The tensile axis was chosen to be parallel to the rolling direction. The specimens were solution treated at 1123K.Then each of them was aged at 773 K for 6 ks under a specifically chosen external tensile-stress of 0,165,300 or 500 Mpa. Thermal cycling tests under various applied tensile-stresses were made on these specimens. Transmission electron microscopic observation was made for structural investigation and differential scanning calorimetry was made to see the transformation behavior. Specimens aged under external tensile-stress shrink in association with the B2*R transformation, and the amount of the shrinkage decreases with increasing stress applied in testing. These specimens do work effectively to the outside when the applied stress is between 50 and 100 MPa. In association with the R*B19' transformation, these specimens shrink when the applied stress is around 7 MPa, but elongates when it is 50 MPa or greater. Unrecoverable strain does not remain in specimens when thermal cycling is made in the temperature range which covers the B2*R transformation, but it does when thermal cycling is made in the temperature range which covers the B2*R*B18^* transformation.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] T.Fukuda, M.Kitayama, T.Kakeshita, T.Saburi: "Martensitic Transformation Bahavior of a Shape Memory Ti-40.5Ni-10Cu Alloy Affected by the C11 b-type Precipitates." Materials Trans.,JIM. 37・10. 1540-1546 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Fukuda, T.Saburi, T.Kakeshita, M.Kitayama: "Shape Memory Behavior of Ti-40.5Ni-10Cu Alloy Affected by C11b-type Precipitates" Materials Trans.,JIM. 38・2. 107-111 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Fukuda, A.Deguchi, T.Kakeshita and T.Saburi: "Stress-induced R-B2 Transformation and Psseudoelasticity Associated with Twinning in a Ti-Ni Alloy Including Aligned Particles of Ti3Ni4." Materials Trans.,JIM. 38・6. 514-520 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Fukuda, A.Deguchi, T.Kakeshita and T.Saburi: "Two-Way Shape Memory Properties of a Ni-Rich Ti-Ni Alloy Aged Under Tensile Stress" Materials Trans.,JIM. 38・12. 1057-1062 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Fukuda, M.Kitayama, T.Kakeshita and T.Saburi: "Martensitic Transformation Bahavior of a Shape Memory Ti-40.5Ni-10Cu Alloy Affected by the C11 b -type Precipitates." Materials Trans., JIM. Vol.37-No.10. 1540-1546 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Fukuda, T.Saburi, T.Kakeshita and M.Kitayama: "Shape Memory Behavior of Ti-40.5Ni-10Cu Alloy Affected by C11b-type Precipitates" Materials Trans., JIM. Vol.38-No.2. 107-111 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Fukuda, A.Deguchi, T.Kakeshita and T.Saburi: "Two-Way Shape Memory Properties of a Ni-Rich Ti-Ni Alloy Aged Under Tensile Stress" Materials Trans., JIM. Vol.38-No.6. 514-520 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Fukuda, A.Deguchi, T.Kakeshita and T.Saburi: "Stress-induced R-B2 Transformation and Psseudoelasticity Associated with Twinning in a Ti-Ni Alloy Including Aligned Particles of Ti3Ni4." Materials Trans., JIM. Vol.38-No.12. 1057-1062 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Fukuda, A.Deguchi, T.Kakeshita and T.Saburi: "Two-Way Shape Memory Properties of a Ni-Rich Ti-Ni Alloy Aged Under Tensile Stess" Materials Transactions,JIM. 38・6. 514-520 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Fukuda, A.Deguchi, T.Kakeshita and T.Saburi: "Stress Induced R→B2 Transformation and Psudoelasticity Associated with Twinning in a Ti-Ni Alloy Including Aligned Particles of Ti3N4" Materials Transactions,JIM. 38・12. 1057-1062 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Kakeshita,T.Takeguchi,T.Fukuda and T.Saburi: "Time-Dependent Nature of the Athermal Martensitic Transformation in a Cu-Al-Ni Shape Memory Alloy." Materials Transactions,JIM. Vol.37. 299-303 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 隅田武男,生野健,福島一夫,吉川州彦,佐分利敏雄: "オーステナイト系ステンレス鋼σ相の観察方法の開発" 鉄と鋼. Vol.82 No.3. 68-72. (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Kakeshita,T.Fukuda and T.Saburi: "Time-Dependent Nature of the Athermal Martensitic Transformation in Fe-Ni Alloys." Scripta Materialia. Vol.34 No.1. 147-150. (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Fukuda,M.Kitayama,T.Kakeshita and T.Saburi: "Martensitic Transformation Bahavior of a Shape Memory Ti-40.5Ni-10Cu Alloy Affected by the Cll_b-type Precipitates." Materials Transactions,JIM. Vol.37 No.10. 1540-1546 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Fukuda,T.Saburi,T.Kakeshita and M.Kitayama: "Shape Memory Behavior of Ti-40.5Ni-10Cu Alloy Affected by C11b-type Precipitates." Materials Transactions,JIM. Vol.38 No.2. 107-111 (1997)

    • Related Report
      1996 Annual Research Report

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

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