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

A Research on Microscopic and Macroscopic Mechanics in Melting/Solidification Processes Incorporating Moving Boundary/Interface, and Its Application to Welding and Bonding

Research Project

Project/Area Number 10305011
Research Category

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

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

INOUE Tatsuo  Kyoto University, Energy Science, Professor, エネルギー科学研究科, 教授 (10025950)

Co-Investigator(Kenkyū-buntansha) UEHARA Takuya  Kyoto University, Energy Science, Research Associate, エネルギー科学研究科, 助手 (50311741)
IMATANI Shoji  Kyoto University, Energy Science, Associate Professor, エネルギー科学研究科, 助教授 (70191898)
HOSHIDE Toshihiko  Kyoto University, Energy Science, Associate Professor, エネルギー科学研究科, 助教授 (80135623)
望月 正人  大阪大学, 大学院・工学研究科, 講師 (10304015)
堤 三佳  京都大学, エネルギー科学研究科, 助手 (70293925)
Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥39,600,000 (Direct Cost: ¥39,600,000)
Fiscal Year 2000: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥9,000,000 (Direct Cost: ¥9,000,000)
Fiscal Year 1998: ¥27,400,000 (Direct Cost: ¥27,400,000)
KeywordsPhase transformation / Metallo-thermo-mechanics / Molecular dynamics / Heat affected zone / Crystal plasticity / Finite element method / Phase-field method / 境界・界面移動 / 溶融・凝固 / 微視的・巨視的力学 / 溶接 / 接合 / 構成式 / シミュレーション
Research Abstract

Analyses on melting and solidification processes are carried out by microscopic, macroscopic and mesoscopic viewpoints, in order to reveal the mechanism and to build up thermo-mechanical theory on the phase transformation processes incorporating moving boundary and interface, such as welding and joining. Molecular dynamics method and the finite element method are used as microscopic and macroscopic method, respectively, while phase-field method and crystal plasticity theory are applied to mesoscopic analysis. The summary is as follows :
(1) Microscopic Analysis by Molecular Dynamics Method : The motions of atoms around the interface of solid and liquid are analyzed and the stability of the interface, anisotropy in the interface energy depending on crystal orientation are evaluated. And the preferred orientations of crystal growth are determined from the relation between the orientation and interface energy.
(2) Mechanical Properties of Welded Heat Affected Zone : Deformation in the micro … More scopic area in the weld metal, heat-affected zone, and parent material of Mo.9Cr-1Mo steel is measured by the micro-grid method, and the relation between hardness, structural change and strain is revealed to be clear.
(3) Analysis of Crystal Growth Process by Phase-Field Method : Crystal growth process is analyzed by the phase-field method in which mechanical and thermophysical properties and anisotropy based on the molecular dynamics simulation are introduced. Various modes of dendritic crystals are obtained by the combination of the parameters. These results made it possible to observe the dynamic process of the pattern formation, and some phenomena such as initial stage of crystal growth, which is difficult to experimentally observe, are demonstrated.
(4) Finite Element Analysis Based on Crystal Plasticity Theory : Deformation behavior in the heat-affected zone was simulated by the finite element method, and the results obtained by the model in which grain size and anisotropy was introduced were revealed to be corresponding to experimental results. These results are supporting the relation obtained in (2). Less

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] Takuya Uehara: "Molecular Dynamics Approach to Thermo-Mechanical Behavior of a Thin-Film Surface during Melting and Solidification"Proceedings of the 8^<th> International Conference on Mechanical Behavior of Materials. Vol.II.5. 712-717 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takuya Uehara: "Molecular Dynamics Simulation of Melting and Solidification Processes in Thin Film"Proceedings of the 11^<th> Symposium on Phase Change Optical Information Storage (PCOS'99). 6-11 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 水原弾: "Mod.9Cr-1Mo鋼溶接継手の熱影響部近傍における不均一変形と力学的特性"第49期日本材料学会学術講演会講演論文集. 111-112 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 上原拓也: "結晶成長過程における熱の流れの分子動力学シミュレーション"第21回日本熱物性シンポジウム講演論文集. 345-347 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 河原正範: "結晶成長の分子動力学シミュレーションとそのフェーズフィールドモデルへの応用"日本機械学会平成12年度計算力学部門講演会講演論文集. 547-548 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shigeru Yamanaka: "Transformation Plasticity-The Effect an Metallo-Thermo-Mechanical Simulation of Carburized Quenching Process"Proceedings of 1st International Conference on Thermal Process Modeling and Computer Simulation. 185-195 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takuya Uehara: "Molecular Dynamics Approach to Thermo-Mechanical Behavior of a Thin-Film Surface during Melting and Solidification"Proc. of the 8^<th> International Conference on Mechanical Behavior of Materials. Vol.II.5. 712-717 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takuya Uehara: "Molecular Dynamics Simulation of Melting and Solidification Processes in Thin Film"Proc. of the 11^<th> Symposium on Phase Change Optical Information Storage (PCOS'99). 6-11 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Tadashi Mizuhara: "Non-uniform Deformation and Mechanical Property around the Heat Affected Zone of Welded Joint of Mod.9Cr-1Mo Steel (in Japanese)"Proc. of the 49th Annual Meeting of the Society of Materials Sciences, Japan. 111-112 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takuya Uehara: "A Molecular Dynamics Simulation of Heat Flow during Crystal Growth (in Japanese)"Proc. of the 21st Japan Symposium on Thermophysical Properties. 345-347 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Masanori Kawahara: "Molecular Dynamics Simulations of Crystal Growth and its Application to Phase-Field Models (in Japanese)"Proc. of the 13th Computational Mechanics Conference, JSME. 547-548 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shigeru Yamanaka: "Transformation Plasticity The Effect an Metallo-Thermo-Mechanical Simulation of Carburized Quenching Process"Proc. of 1st International Conference on Thermal Process Modeling and Computer Simulation. 185-195 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takuya Uehara: "Molecular Dynamics Simulations of Nucleation and Crystallization Processes in Multi-layer Thin Films"20th International Congress of Theoretical and Applied Mechanics. 176 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 上原拓也: "結晶成長過程における熱の流れの分子動力学シミュレーション"第21回日本熱物性シンポジウム講演論文集. 345-347 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 河原正範: "結晶成長の分子動力学シミュレーションとそのフェーズフィールドモデルへの応用"日本機械学会平成12年度計算力学部門講演会講演論文集. 547-548 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 河原正範: "フェーズフィールド法および分子動力学法による結晶成長シミュレーション"第8回メゾ材料シンポジウム講演要旨集. 67-68 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Shigeru Yamanaka: "Transformation Plasticity - The Effect an Metallo-Thermo-Mechanical Simulation of Carburized Quenching Process"Proceedings of 1st International Conference on Thermal Process Modeling and Computer Simulation. 185-195 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 前田亮平: "溶接熱影響部の微視的変形と結晶塑性解析による検討"第50期日本材料学会学術講演会講演論文集. (発表予定). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Takuya Uehara: "Molecular Dynamics Approach to Thermo-Mechanical Behavior of a Thin-Film Surface during Melting and Solidification"Proceedings of the 8^<th> International Conference on Mechanical Behavior of Materials. Vol.II.5. 712-717 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 上原拓也: "多層薄膜における溶融・凝固過程の分子動力学的考察"1999年度年次大会講演論文集. 55-56 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Tatsuo Inoue: "Phase Transformation and Related Thermo-mechanical Behavior ……A Molecular Dynamics Approach"Proceedings of the 3^<rd> Mechanics and Materials Conference on Mechanics and Multi-Physics Processes in Solids. Vol.9. 341-349 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Takuya Uehara: "Molecular Dynamics Simulation of Melting and Solidification Processes in Thin Film"Proceedings of the 11^<th> Symposium on Phase Change Optical Information Strage (PCOS'99). 6-11 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 水原弾: "Mod. 9Cr-1Mo 鋼溶接接手の熱影響部近傍における不均一変形と力学的特性"第49期日本材料学会学術講演会講演論文集. (発表予定). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 上原拓也: "相変態過程における変態潜熱と熱伝導の効果に関する分子動力学的考察"第49期日本材料学会学術講演会講演論文集. (発表予定). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Shouji Imatani: "Finite Element Analysis of Stefan Problem Based on Integral Penelty Approch" Proceedings of 32nd Solid Mechanics Conference. 423-424 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Shouji Imatani: "Stress Analysisof Quenching Process Following Draw Forming" Proceedings of Euromech 385 Colloquium on Inelastic Analysisof Structures under Varying Loads. 161-163 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 上原 拓也: "薄膜の溶融・凝固過程における表面形状と微視構造変化の分子動力学シミュレーション" 日本機械学会論文集(A編). 64・626. 2448-2455 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tatsuo Inoue: "Molecular Dynamics Simulation of Melting/Solidification and Induced Stresses" IUTAM Symp.on Variation of Domain and Free Boundary Problems in Solid Mechanics. 103-111 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tatsuo Inoue: "Phase Transformation and Related Thermo-Mechanical Behavior ---A Molecular Dynamics Approach" Proc.3rd European Mechanics of Materials Conferenceon Mechannics and Multi-Physics. (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 上原 拓也: "分子動力学シミュレーションに基づく相変態の熱力学の微視的考察" 第76期日本機械学会全国大会講演論文集. 1. 219-220 (1998)

    • Related Report
      1998 Annual Research Report

URL: 

Published: 1998-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi