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Solidification from highly undercooled iron base alloys and formation of metastable phases

Research Project

Project/Area Number 60460193
Research Category

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

Allocation TypeSingle-year Grants
Research Field 金属加工(含鋳造)
Research InstitutionThe University of Tokyo

Principal Investigator

UMEDA Takateru  Dept. of Metallurgy, Fac. of Eng., The Univ.of Tokyo, 工学部, 教授 (50011078)

Co-Investigator(Kenkyū-buntansha) IKEDA Minoru  Dept. of Metallurgy, Fac. of Eng., The Univ.of Tokyo (50167243)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1986: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1985: ¥5,900,000 (Direct Cost: ¥5,900,000)
Keywordsundercooling / solidification from highly undercooling / rapid solidification processing / metastable phase / 急速凝固
Research Abstract

Non-equilibrium crystals and amorphous materials produced by rapid solidification processings have developed and are growing to new advanced materials. Their characteristics largely depend on the rapid solidification variables and therefore it is very important to understand the correlation between processing and controlling of structures and properties. Liquid metals are highly undercooled in rapid cooling prior to crystallization. To simulate the rapid solidification, it is a basic problem to know to what extent the maximum undercooling is achieved and what phase is formed. In this research, relationship between composition,undercooling and phase formed is considered for iron base alloys containing semi-metals. In Fe-B alloys, metastable eutectic ( Fe+FeB ) is first observed. In Fe-P alloys, metastable eutectic are also confirmed. In Fe-C alloys, metastable <delta> phase is formed in the range of the hyperperitectic composition of 1.2%. These metastable phases can be explained by the thermodynamic consideration for undercooling. In Fe-Si-B alloys, large undercooling range for primary FeB is consistent with the formation range of amorphous.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 小野隆浩: 日本金属学会誌.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 松野英寿: 日本金属学会誌.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 深沼哲彦: 日本金属学会誌.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Hidetoshi MATSUNO et. al.: "Solidification from highly undercooled Fe-( B,Si,P ) alloys" Trans. of Inst. of Metals.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Takanori ONO et. al.: "Solidification from highly undercooled Fe-C alloys and formation of metastable <delta> phase" Trans. of Inst. of Metals.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Tetsuhiko Fukanuma et. al.: "Solidification from highly undercooled Fe-Si-B alloys" Trans. of Inst. of Metals.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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