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Homogenous distribution of the minor phase in immiscible Al-based alloys solidified by electromagnetic vibration processing

Research Project

Project/Area Number 20K05186
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 26060:Metals production and resources production-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Li Mingjun  国立研究開発法人産業技術総合研究所, 材料・化学領域, 主任研究員 (50392808)

Co-Investigator(Kenkyū-buntansha) 田村 卓也  国立研究開発法人産業技術総合研究所, 材料・化学領域, 研究チーム長 (30446588)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsアルミニウム / 電磁振動 / 不混和性合金 / 孤立微細分散 / スズ / アルミニウム合金 / 均一分散 / 凝固プロセス / 組織制御 / 鋳造
Outline of Research at the Start

本研究では、Al-(Bi, Sn)不混和性合金を対象として、Al母相中における第二相の分散状態と電磁振動条件の関係を把握することで、第二相が母相中に均一孤立分散するメカニズムを明らかにすることを目的とする。

Outline of Final Research Achievements

The immiscible Al-Sn alloy is prone to segregate under a usual casting condition. If the Sn phase can be isolated finely and dispersed homogenously into the Al matrix, the properties will be greatly enhanced. In the present study, we solidified Al-20 wt% Sn when electromagnetic vibration (EMV) was imposed upon the solidifying liquid. The effects of electric current, vibration frequency, and magnetic flux density on the solidification microstructure were examined and characterized. It was found that when EMV was imposed at f = 100 Hz, the Sn phase could be isolated finely and dispersed homogenously in the primary Al matrix. The specimen with fine Sn dispersions had an improved elongation in tensile tests. The homogenous distribution of Sn is attributed to the uncoupled movement between the primary Al phase and the surrounding liquid, which may breakdown the Sn liquid film into discrete segments and thus form isolated particles at the final stage.

Academic Significance and Societal Importance of the Research Achievements

二相分離(偏晶型)合金は構成する金属間の密度差が大きく、鋳造時には軽元素は上に浮き、重元素は下に沈むため偏析しやすく、従来の鋳造技術では作製が不可能であった。これらの二相分離合金の第二相を母相中に均一に孤立微細分散させることができれば、優れた特性を有する複合材料が創製できる。我々は直流磁場中で溶湯に交流電流を印加することで発生する電磁振動プロセスを用いる事により、Al-Sn不混和性合金において第二相のSnがAl母相に均一に孤立微細分散した事に成功した。磁場強度の影響を精査した結果、Snの孤立微細分散できる原理を見出すことができた。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (5 results)

All 2023 2022

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Improved solidification structures and mechanical properties of Al-20wt% Sn alloys processed by an electromagnetic vibration technique2023

    • Author(s)
      Tamura Takuya、Li Mingjun、Takahashi Koichi、Inoue Eisaku
    • Journal Title

      Materials Science and Engineering: A

      Volume: 862 Pages: 144416-144416

    • DOI

      10.1016/j.msea.2022.144416

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Refinement of Microstructure of JIS A7204 and A6022 Aluminum Alloys Solidified by Electromagnetic Vibration Technique2022

    • Author(s)
      Li Mingjun、Tamura Takuya、Takahashi Koichi
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 63 Issue: 6 Pages: 923-930

    • DOI

      10.2320/matertrans.F-M2022804

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2022-06-01
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Structural refinement of 7204 and 6022 aluminum alloys solidified by an electromagnetic vibration technique2022

    • Author(s)
      Mingjun Li, Takuya Tamura, Koichi Takahashi
    • Organizer
      日本鋳造工学会第179回全国講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Homogeneous dispersion of fine Sn particles in immiscible Al-Sn alloys solidified by an electromagnetic vibration technique2022

    • Author(s)
      Mingjun Li, Takuya Tamura, Eisaku Inoue
    • Organizer
      The 18th International Conference on Aluminum of Alloys (ICAA18)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 電磁振動プロセスを利用したAl-7mass%Si連続鋳造棒における組織変化2022

    • Author(s)
      田村卓也、李明軍、高橋功一
    • Organizer
      日本鋳造工学会第180回全国講演大会
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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