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Study of the Formation Process of Martensite Nuclei.

Research Project

Project/Area Number 02402045
Research Category

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

Allocation TypeSingle-year Grants
Research Field Physical properties of metals
Research InstitutionUniversity of Tsukuba

Principal Investigator

SUZUKI Tetsurou  Univ.Tsukuba, Inst.Appl.Phys.Prof., 物理工学系, 教授 (70045988)

Co-Investigator(Kenkyū-buntansha) OHSHIMA K.  Univ.Tsukuba, Inst.Appl.Phys.Asso.Pro., 物質工学系, 助教授 (70109271)
OTSUKA K.  Univ.Tsukuba, Inst.Mat.Sci.Prof., 物質工学系, 教授 (50029881)
HOSHINO T.  Univ.Tsukuba, Inst.Struct.Prof., 構造工学系, 教授 (30027130)
TAKANO S.  Kyoto Inst.Tech.Eng.Dept.Prof., 工芸学部, 教授 (80027341)
Project Period (FY) 1990 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥10,000,000 (Direct Cost: ¥10,000,000)
Fiscal Year 1993: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1992: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1991: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1990: ¥5,100,000 (Direct Cost: ¥5,100,000)
KeywordsNucleation / Martensite / Computer simulation / X-ray diffraction / Neutron Diffraction / Incubation time / Elastic constant / Strain dipole / 核生成待機時間 / 中性子回折 / マルテンサイト核 / ゴム状弾性 / 複合空格子点 / 部分的ソフト化 / フォノン分散関係 / マルテンサイト核生成過程 / 非線型格子振動 / シミュレーション / ゴム状振舞い / ナトリウム単結晶 / 中性子散乱 / 潜状待機期間 / 統計的中らぎ現象 / 相互作用ポテンシャル / シミュレ-ション / B、C、C、結晶 / 動経分布関数 / 微粒子結晶 / InーTl合金 / ナトリウム結晶 / マルテンサイト核生成 / 界面條件 / 高分解能強度分布
Research Abstract

The purpose of the present investigation has been to investigate the nucleation process of the martensite by use of computer simulation and X-ray and neutron diffraction experiment.
As the result of computer simulation^<(1,2,7)>, it has become clear that the presence of dislocations with a specific configuration is not required. Either large finite displacement of an atom or presence of a single vacancy can trigger the formation of the martensite nucleus. Also the crystal surface itself can trigger the formation of the martensite nucleus.
In order to investigate the nucleation of the Martensite nucleus in the inside of a crystal, not on the surface of a crystal, X-ray and neutron diffraction methods^<(4,6)> are adopted instead of an electron or optical microscopic method, which has been often traditionally used. The presence of the incubation time has been clearly recognized in all cases studied in the present investigation. At the same time, the presence of any prior sign for the initiation of the martensitic transformation has been clearly ruled out. These results shows that the martensitic transformation is one of typical first order phase transformations^<(3)>..
At the final stage of the present investigation^<(7)>, the decrease of the elastic constant of alloy crystals as the temperature approaches Ms has been found to be caused by the presence of the strain dipoles, which are responsible for the rubber-like behavior found in the aged martensite alloys^<(5)>.

Report

(5 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] T.Suzuki.: "Nucleation Mechanism of the Martensite" Materials Transactions,JIM.32. 114-121 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Suzuki and K.Takahashi: "Nucleation Process of Martensite in Small Particles." Materials Transactions,JIM.33. 184-190 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Suzuki and K.Osuka: "Role of Higher Order Elastic Moduli in Large Finite Deformation" Japanese Journal of Applied Physics.32. 2252-2253 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] N.Toyoshima,K.Harada,H.Abe,K.Ohshima and others.: "X-Ray Diffraction Study of Martensitic Transformation in In-23 at % Tl Alloys." (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Tonokawa,S.Morito,Y.Nakajima and others: "Study of Rubber-like Elasticity in Shape Memory Alloys Using Static and Dynamic Elastic Moduli Measurement." Japanese Journal of Applied Physics.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Abe,K.Ohshima,T.Suzuki and S.Hoshino: "Neutron-scattering of Metallic Sodium." Physical Review B.49. 3739-3745 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Suzuki: "Nucleation Mechanism of the Martensite" Materials Transactions, JIM. 32. 114-121 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Suzuki and K.Takahashi: "Nucleation Process of Martensite in Small Particles." Materials Transactions, JIM. 33. 184-190 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Suzuki and K.Osuka: "Role of Higher Order Elastic Moduli in Large Finite Deformation." Jpn.J.Appl.Phys.32. 2252-2255 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] N.Toyoshima, K.Harada, H.Abe, K.Ohshima, T.Suzuki, M.Wuttig and T.R.Finlayson: "X-Ray Diffraction Study of Martensitic Transformation in In-23 at.%Tl Alloy." Jpn.J.Phys.Soc.Jpn.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Tonokawa, S.Morito, Y.Nakajima, A.Ooishi and T.Suzuki: "Study of Rubber-like Elasticity in Shape Memory Alloy Using Static and Dynamic Elastic Moduli Measurement." Jpn.J.Appl.Phys.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Abe, K.Ohshima, T.Suzuki and S.Hoshino: "Neutron-scattering study of Metallic Sodium" Phys.Rev.B.49. 3739-3745 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Suzuki: "Report on "Study of the Formation Process of Martensite Nuclei"." Submitted to the Ministry of Education, Japan (in Japanese). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Abe,K.Ohshima,T.Suzuki,S.Hoshino and K.Kakurai: "Neutron-scattering study of metallic sodium" Physical Review B. 49. 3739-3745 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] N.Toyoshima,K.Harada,H.Abe,K.Ohshima,T.Suzuki,M.Wuttig and R.Finlayson: "X-ray Diffraction study of Martensitic Phase Transition in In-23at%Tl Alloy." Journal of Physical Society of Japan. 63(印刷中). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Suzuki and K.Osuka: "Role of Higher-Order Elastic Maleili in Large Elastic Finite Defomatior" Japanese Journal of Applied Physics. 32. 2252-2255 (19)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Inohara and T.Suzuki: "Measurement of Elastic Moduli by Rectangular Parallelepiped Resonance Metal II" Japanese Journal of Applied Physics. 32. 2238-2242 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Suzuki,H.Abe,K.Ohshima,S.Hoshino and K.Kakurai: "Martensitic Transformation in Sodium Single Crystals" Proceedings of IUMRS. (印刷中). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Tetsuro Suzuki and Kenichi Tadahashi: "Nucleation Process of Martensite in Small Partide" Materials Transactions,JIM. 33. 184-190 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Tetsuro Suzuki and Kenichi Osuka: "Role of Higher Order Elastic Modul in Large Elastic Finite Deformation" Japanese Joumal of Applies Physics.

    • Related Report
      1992 Annual Research Report
  • [Publications] N.Toyoshima,H.Hoya and K.Ohshima: "A simple device for mounting a vacuum chamber on a fourーcircle diffractometer with central x circle" J.Appl.Cryst.24. 1074-1075 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tetsuro Suzuki and Kenichiro Takahashi: "Nucleation Process of Martensite in Small Particle" Materials Transactions,JIM. 33. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tetsuro Suzuki: "Nucleation Mechanism of Martensite" Materials Transactions,JIM. 32. 114-121 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Suzuki and M.Wuttig: "On the Formation of Martensite" Materials Science and Engineering. A127. 239-241 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Suzuki,T.Mukaigaito and T.Hoshino: "Dynamical Simulation of the Nucleation Process of the Martensite" Materials Science Forum. 56ー58. 113-118 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] I.Takahashi and T.Suzuki: "Simulation of the Growth Process of Martensite Using Cellular Automata and Measurement of Acoustic Emission" Materials Science Forum. 56ー58. 125-130 (1990)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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