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

Micromechanics of Superplasticity

Research Project

Project/Area Number 08242105
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Research InstitutionNagoya University

Principal Investigator

MURAKAMI Sumio  Graduate School of Engineering, Nagoya University, Prof., 大学院・工学研究科, 教授 (10023053)

Co-Investigator(Kenkyū-buntansha) TOKUDA Masataka  Mie Univ., Fac. of Engineering, Prof., 工学部, 教授 (90023233)
MARUYAMA Kouichi  Tohoku Univ., School of Engineering., Prof., 大学院・工学研究科, 教授 (90108465)
AIZAWA Tatsuhiko  Univ. of Tokyo, Dept. of Mater. Sci. Fac. of Eng., Prof., 大学院・工学系研究科, 教授 (10134660)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥108,100,000 (Direct Cost: ¥108,100,000)
Fiscal Year 1998: ¥13,900,000 (Direct Cost: ¥13,900,000)
Fiscal Year 1997: ¥68,000,000 (Direct Cost: ¥68,000,000)
Fiscal Year 1996: ¥26,200,000 (Direct Cost: ¥26,200,000)
KeywordsSuperplasticity / Micromechanics / Superplastic Forming / Simulation / Constitutive Equation / Granular Model / Theory of Plasticity / High Temperature Deformation / 超塑性成形法 / 粒界すべり / 空洞成長 / 粒界液相 / 結晶塑性 / 界面弾性ポテンシャル / 損傷力学
Research Abstract

The present project aims to elucidate the process of microstructural change governing superplastic deformation from micromechanics point of view, to establish a new theoretical framework for the precise description of superplastic behavior of various materials, and to investigate the possibility of developing new superplastic materials and new superplastic forming and manufacturing processes. The research results obtained during the term of the project are summarized as follows :
1) The Head Investigator Murakami performed a series of tests on superplastic deformation and fracture under wide variety of combined states of stress, discussed the results from the micromechanics and continuum mechanics points of view, and thereby formulated a new mechanical model of describing the process of deformation and fracture of superplastic materials. The model made possible the simulation of the deformation process of the commercial superplastic material of Al5083 alloy.
2) Investigator Aizawa develo … More ped extensively computational material models for the analysis of superplastic forming rocess, and established new methods of superplastic forming. He succeded in developing a simulation method for the superplastic forging by the use of the modified granular model and micro-macro stress analysis. He proposed methods of the superplastic injection forming and superplastic spinning. These two methods will be developed as a prototype of superplastic forming in the next generation.
3) Investigator Maruyama observed the superplastic behavior and the associated deformation mechanisms of Ti-Al-Fe alloys, and formulated a superplastic constitutive equation for materials of two-phase structure. The results of tensile tests of the material showed superplastic elongation of 800 % at the temperature range of 1050K through 1200K. According to the microstructural observations, the relaxation mechanism of the concentrated stress was found to be the stress-induced phase transformation which is different from the mechanisms observed so far. A new constitutive equation was proposed based on this mechanism.
4) Investigator Tokuda elucidated the macroscopic and microscopic properties of the commercial superplastic material of Al5083 alloy by performing combined load tests on the tubular specimens of the material. He discussed the superplastic deformation based on the constitutive theory of viscoplasticity and micromechanics, and proposed a constitutive model of fine-grained superplasticity for three-stage Finite Element Analysis. Less

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (33 results)

All Other

All Publications (33 results)

  • [Publications] E.Tanaka: "Constitutive Modeling of Superplasticity Taking Account of Grain and Cavity Growth"Material Science Forum. 233/234. 21-28 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Aizawa: "Acoustic Spectro-Microscopy for Quantitative Nondestructive Evaluation of Ceramic Coated Materials"Nondestructive Evaluation of Ceramics. 89. 183-194 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Aizawa: "Macro-Micro Modeling for Superplastic Forming"Proceedings of IMSP. 1. 231-246 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.Koike: "Influence of Liquid-Phase Inclusion on High-Temperature Deformation Behavior in Al-Bi Alloys"Material Science and Engineering. A234/236. 525-528 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.Koike: "Effects of the Liquid Phase on the High-Temperature Tensile Ductility : From Embrittlement to Superplasticity"Philosophical Magazine A. 78. 599-614 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Tokuda: "Superplastic Deformation under Complex Loading Conditions"Metals and Materials. 4. 891-894 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 丸山公一,中島英治: "高温強度の材料化学-クリープ理論と実用材料への適用"内田老鶴圃. 329 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] E. Tanaka: "Constitutive Modeling of Superplasticity Taking Account of Grain and Cavity Growth"Mater. Sci. Forum. 233. 21-28 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T. Aizawa: "Acoustic Spectro-Microscopy for Quantitative Nondestructive Evaluation of Ceramic Coated Materials"Nondestructive Evaltn of Ceram. 89. 183-194 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T. Aizawa: "Macro-Micro Modeling for Superplastic Forming"Proceedings of IMSP. 1. 231-246 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J. Koike: "Influence of Liquid-Phase Inclusion on High-Temperature Deformation Behavior in Al-Bi Alloys"Mater. Sci. and Eng.. A234/236. 525-528 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J. Koike: "Effects of the Liquid Phase on the High-Temperature Tensile Ductility : From Embrittlement to Superplasticity"Philosophical Magazine A. 78. 599-614 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Tokuda: "Superplastic Deformation under Complex Loading Conditions"Metals and Materials. 4. 891-894 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K. Maruyama and H. Nakajima: "Materials Science in high-temperature strength -creep theory and application to engineering materials"Uchida Rokakuho Publishing Co., Ltd.. 329 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 田中英一: "超塑性構成式の精密化と多軸応力状態への拡張" 日本機械学会論文集,A編. 64.622. 1611-1616 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] E.Tanaka: "Multiaxial Experiments and Constitutive Modeling of Superplasticity" Material Science Forum. (印刷中). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Aizawa: "Acoustic Spectro-Microscopy for Quarrtitative Nondestructive Evaluation of Ceramic Coated Materials" Nondestructive Evaluation of Ceramics. 89. 183-194 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Aizawa: "Macro-micro Modeling for Superplastic Forming" Proceedings of IMSP'97. 231-246 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] J.Koike: "Effects of the Liquid Phase on the High-Temperature Tensile Ductility:From Embrittlement to Superplasticity" Philosophical Magazine,A. 78.3. 599-614 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Tokuda: "Superplastic Deformation under Complex Loading Conditions" Metals and Materials. 4.4. 891-894 (1988)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田中 英一: "結晶粒および空洞の成長を考慮した超塑性構成式の定式化" 日本機械学会論文集、A編. 63・609. 962-967 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 田中 英一: "超塑性構成式の精密化と多軸応力状態への拡張" 日本機械学会論文集、A編. 64(印刷中). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Aizawa: "Mesoscopic Modeling for Superplasticity" Material Science Forum. 233・. 37-46 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Aizawa: "Superplastic Analysis of Fine‐Grained Aggregates by the Structured Granular Modeling" Proceedings of THERMEC'97. 1899-1905 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] J.Koike: "Influence of Liquid‐Phase Inclusion on High-Temperature Deformation Behavior in Al-Bi Alleys" Material Science and Engineering. A234/236. 525-528 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 徳田 正孝: "複合負荷条件下の超塑性変形に関する実験的研究" 日本機械学会第74期通常総会講演会講演論文集. 79・1. 171-172 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 丸山 公一: "高温強度の材料科学-クリープ理論と実用材料への適用" 内田老鶴圃, 329 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] E.Tanaka: "A Constitutive Model of Superplasticity" Advances in Engineering Plasticity and Its Applications (AEPA'96),pergamon.253-258 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] E.Tanaka: "Constitutive Modeling of Superplasticity Taking Account of Grain and Cavity Growth" Materials Science Forum. 233/234. 21-28 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Aizawa: "Mesoscopic Modeling for Superplasticity" Materials Science Forum. 233/234. 37-46 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Aizawa: "Granular Modeling Approach to Electro-Packing Materials" J.Machanics of Materials. (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] J.Koike: "High Temperature Deformation Characteristics of Sintered Alumina Having Amorphous Grain Boundaries" Materials Science Forum. 233/234. 351-358 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] J.Koike: "Mechanical Properties and Microstructure of Centrifugally Compacted Aluming and HIPed Alumina" Material Science and Engineering. A220. 26-26 (1996)

    • Related Report
      1996 Annual Research Report

URL: 

Published: 1996-04-01   Modified: 2019-02-15  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi