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DEVELOPMENT OF HIGH-SPEED SOLIDIFICATION PROCESS FOR PRODUCTION OF RAPID SOLIDIFICATION MATERIALS

Research Project

Project/Area Number 05239102
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Research InstitutionUNIVERSITY OF TOKYO

Principal Investigator

NISHIO Shigefumi  University of Tokyo, Institute of Industrial Science, Professor, 生産技術研究所, 教授 (00111568)

Co-Investigator(Kenkyū-buntansha) IWAKI Toshihiro  Toyama University, Dept.of Mechanical System Engineering, Professor, 工学部, 教授 (90019191)
SUZUKI Toshio  University of Tokyo, Dept.of Metallurgy Professor, 大学院・工学系研究科, 教授 (70115111)
FUKUSAKO Shoichiro  Hokkaido University, Div.Mechanical Science Professor, 工学部, 教授 (00001785)
齋藤 武雄 (斎藤 武雄)  東北大学, 工学部, 教授 (80064161)
Project Period (FY) 1993 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥58,400,000 (Direct Cost: ¥58,400,000)
Fiscal Year 1995: ¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 1994: ¥20,200,000 (Direct Cost: ¥20,200,000)
Fiscal Year 1993: ¥23,300,000 (Direct Cost: ¥23,300,000)
KeywordsRapid Solidification / Molecular Dynamics / Nucleation / Melt Quenching / Contact Resistance / Contact Line / 伝熱 / 凝固 / 過冷 / 凝固シシュレーション / 過冷却 / 超急冷 / 素材製造 / 凝固組織
Research Abstract

In general, solidification process consists of a sequential series of the following elementary phenomena : nucleation, crystal growth, morphological boundary and structure formation. This study aimed at the development of ultra-rapid solidification process which brings about substantial modifications in the sequential series and a variety of attractions compared with conventional solidification of relatively heavy sections.
For the sequential series of elementary phenomena, to predict the ultra-rapid solidification process and contribute to material design, we examined the nucleation condition, modeling of the process from nucleation to structure formation, and application of numerical simulation based on molecular dynamics. Experimental data were accumulated for the effects of melt volume and cooling rate on the supercooling at nucleation. It was also shown experimentally that the quenching and nucleation process becomes uniform by selecting the condition of chill surface. A measuring … More method of nucleation site distribution was developed, and it was found that smaller values of initial superheating of the melt result in more regular distribution of nucleation sites. Based on these results, a model describing the process from nucleation to the structure formation such as dendrites. As for molecular dynamics simulation, it became possible to pursue the formation of thermal stress and dislocations in ultra-rapid solidification.
Rapid solidification is most readily achieved by concurrently imposing high cooling rates and this requires sufficiently good contact of a sufficiently thin section of melt with a metal chill surface to achieve ultra-rapid solidification. In this study, possible mechanisms which obstacle such good contact were investigated and the following results were obtained. The stability of contact line relates closely to the formation of geometrical surface defects resulting in contact resistance. The contact line formed on a moving chill surface is unstable at low and high velocities but it is stable at moderate velocities. The destabilizing velocity, which is the upper critical velocity of the stable contact line, results from the dynamic non-wetting condition of the contact line. The stabilizing velocity, which is the lower critical velocity of the stable contact line, decreases with decreasing thermal conductivity of the chill surface. To stabilize the contact line and suppress the formation of contact resistance, it is effective to locate the solidification front below the contact line. Less

Report

(4 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • 1993 Annual Research Report
  • Research Products

    (37 results)

All Other

All Publications (37 results)

  • [Publications] Nishio,S.: "Observation of Shell Formation Proces during Initial Solidification on a Suoercooled Solid Surface Dipped into Melt Pool" Proc.7th Int.Symp.on Transport Phenomena in Manufacturing Processes. 236-241 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Nishio,S.: "Relatively Microscopic Observation of Stability of Contact Line Accompanied with Solidification" Proc.ICHMT Symp.on Molecular and Micro Heat Transfer in Materials Processing and Other Applications. 2. 208-319 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Fukusak,T.: "Solidification Characteristics of Supercooled High-Temperature Melt" Proc.4tw ASME/JSME Thermal Engng Conf.4. 55-60 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Yamada,M.: "Solidification and Super coooling Characteristics of a Droplet on a Horizontal Cooled Woll" Proc.3rd KSME-JSME Thermal Engng.Joint Conf.1. 221-226 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Yamada,M.: "Solidification and Supercooling Characteristics of Micro-Scale Droplet" Proc.ICHMT Symp.on Molecular and Micro Heat Transfer in Materials Processing and other Applications. 2. 214-222 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Suzuki,T.: "Dendrite Growth from the Undercooled Melts of Alloys" Proc.ISIJ International. 35. 178-182 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Sakuma,U.: "Rapid solidification Analysis of 18Cr-8Ni Stainless steel Considering Dendrite Growth Conditions" Proc.Tetsu-to-Hagane. 81. 518-522 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Suzuki,T.: "Spatial Pattern Analysis of Primary Dendrite Arrays Using Minimal Spanning Tree" Proc.J.Japan.Inst.Metals.64. 449-455 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Suzuki,T.: "Spatial Pattefn Analysis for Surface Nucleation Point Distribution of Rapidly Solidified Alloys" Proc.ICHMT Symp.on Molecular and Micro Heat Transfer in Materials Processing and other Applications. 2. 223-229 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Iwaki,T.: "Molecular Dynamics Study on Propagation of Pressure Wave and Its Control" Proc.Thermal Science and Engineering. 3. 1-6 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Iwaki,T.: "Molecular Dynamics Study on Stress-Strain in Very Thin Film(Size and Location of Region for Defining Stress and Strain)" Proc.JSME International Journal(seriesA). 39. 346-353 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Iwaki,T.: "Molecular Dynamics Study on Thermal Stress During Very Rapid Solidification" Proc.ICHMT Symp.on Molecular and Micro Heat Transfer in Materials Processing and other Applications. 1. 165-176 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Nishio, S.Inamura and N.Nagai: "Observation of Shell Formation Process during Initial Solidification on a Supercooled Solid Surface Dipped into Melt Pool" Proc.7^<th> Int.Symp.on Transport Phenomena in Manufacturing Processes. 236-241 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Nishio: "Rlatively Microscopic Observation of Stability of Contact Line Accompanied with Solidification" Proc.ICHMT Symp.on Molecular and Micro Heat Transfer in Materials Processing and Other Applications. Vol.2. 308-319 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Fukusako, M.Yamada, and A.Horibe: "Solidification Characteristics of Supercooled High-Temperature Melt" Proc.4^<th> ASME/JSME Thermal.Engng.Conf.Vol.4. 55-60 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Yamada and S.Fukusako: "Solidification and Supercooling Characteristics of a Droplet on a Horizontal Cooled Wall" Proc.3^<rd> KSME-JSME Thermal Engng.Joint Conf.Vol.1. 221-226

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Yamada and S.Fukusako: "Solidification and Supercooling Characteristics of Micro-Scale Droplet" Proc.ICHMTS Symp.on Molecular and Micro Heat Transfer in Materials Processing and Other Applications. Vol.2. 214-222 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Suzuki and K.Sakuma: "Dendrite Growth from the Undercooled Melts of Alloys" Proc.ISIJ International. Vol.35. 178-182 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] U.Sakuma and T.Suzuki: "Rapid solidification Analysis of 18Cr-8Ni Stainless steel Considering Dendrite Growth Conditions" Proc.Tetsu-to-Hagane. Vol.81. 518-522 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] V.Suzuki and T.Sato: "Spatial Pattern Analysis of Primary Dendrite Arrays Using Minimal Spanning Tree" Proc.J.Japan Inst.Metals. Vol.61. 449-455 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Suzuki: "Spatial Pattern Analysis for Surface Nucleation Point Distribution of Rapidly Solidified Alloys" Proc.ICHMT Symp.on Molecular and Micro Heat Transfer in Materials Processing and Other Applications. Vol.2. 223-229 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Iwaki: "Molecular Dynamics Study on Propagation of Pressure Wave and Its Control" Proc.Thermal Science and Engineering. Vol.3. 1-6 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Iwaki: "Molecular Dynamics Study on Stress-Strain in Very Thin Film (Size and Location of Region for Defining Stress and Strain)" Proc.JSME International Journal (series A). Vol.39. 346-353 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Iwaki: "Molecular Dynamics Study on Thermal Stress During Very Rapid Solidification" Proc.ICHMT Symp.on Molecular and Micro Heat Transfer in Materials Processing and Other Applications. Vol.1. 165-176 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 西尾茂文: "凝固を伴う接触界線の安定性" 日本機械学会論文集(B編).

    • Related Report
      1995 Annual Research Report
  • [Publications] S.Fukusako: "Solidification Characteristics of Sapercooled High-Temperature Melt" Proc.4th ASME/JSME Thermal Engng Joint conference. 4. 55-60 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 堀部 明彦: "冷却面上におかれた液滴の凍結挙動に関する研究" 日本冷凍協会論文集. 12. 63-71 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 鈴木 俊夫: "Al-Cu合金溶湯-鋼チル板間の界面抵抗の測定" 錫物.

    • Related Report
      1995 Annual Research Report
  • [Publications] 岩城 敏博: "急冷凝固過程における熱応力の分子動力学シシュレーション" 日本機械学会論文集(A編). 62. 108-114 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Iwaki: "Molecular Dynamics Study on Propagation of Pressure Wave and Its Control" Thermal Science and Engineering. 3. 1-6 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 西尾茂文: "冷却固体面の浸漬過程における凝固シェルの形成過程" 日本機械学会論文集(B編). 60. 4165-4170 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Shigefumi Nishio: "Observation of shell formation process during initial selidification on a supercooled sclid sarface dipped into melt peal" Proc.7th Int.Symposium on Tmnsport Phenomena in Manufactaring Precesses. 236-241 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Takeo S.Saitoh: "Two-dimensionul salidification analysis of the vertical continuous casting system" J.Materials Processing & Manufactaring Science. 3. 17-31 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Toshio Suzuki: "Dendrite growth from the undercoolod melts of alloys" ISIJ International. 35. (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Shouichiro Fukusako: "Salidifiaction churacteristics of supercopled high-temperature melt" Proc.4th ASME/JSME Thermal Engineering Joint Conf.(1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Saitoh,W.Nakamura and T.Gomi: "Time-space method for multiclimensional melting and freezing problems" International Journal for Numerical Methods in Engineering. 37. (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] 斎藤武雄,中村慎,五味達彦: "時間を空間座標とする高速数値解法(タイムスペース法)の提案" 日本機械学会論文集(B編). 60. (1994)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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