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Fabrication of high strength and high electrical conductivity Al alloy through supersaturation of Fe by High-Pressure Torsion

Research Project

Project/Area Number 19K15324
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 26050:Material processing and microstructure control-related
Research InstitutionYokohama National University

Principal Investigator

Masuda Takahiro  横浜国立大学, 大学院工学研究院, 日本学術振興会特別研究員 (60838639)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords巨大ひずみ加工 / 過飽和固溶体 / 結晶粒微細化 / 固溶 / 時効析出 / 高強度 / 高導電性 / 連続加工 / アルミニウム合金
Outline of Research at the Start

アルミニウムは、その高い比強度・導電率から電線材料としても注目されており、実用化のためには高導電率を保持したままの高強度化が望まれる。
本研究の目的は、Al基のAl-Fe 2元系合金に巨大ひずみ加工技術を利用して鉄を過飽和に固溶させ、続く時効処理で鉄含有の微細粒子を析出分散させて、Al本来の高導電率を保持しつつ高強度アルミニウム合金の開発を目指すことである。
研究は、その場X線解析等の動的観察法を取り入れて進める。特に、導電率と微細組織を結びつけることで、導電率を損なわずに強度向上が図れる微細組織を見出す。また、連続加工技術を利用した長尺電線材料作製の観点からも研究を行っていく。

Outline of Final Research Achievements

In this study, the process of high-pressure torsion (HPT) is applied for grain refinement of an Al-2% Fe alloy in a ring shape with a diameter of 100 mm, and thus we can obtain the homogeneous strain distribution. After only 1 turn, the Fe solubility in the Al matrix was increased to 1wt%. The ultimate tensile strength was increased up to 730 MPa after aging at 473 K. Considering the electrical conductivity, 0.25 turns is effective to attain the balance between strength and electrical conductivity. CHPT was further developed in this study, so that two wires were processed simultaneously. Guiding holes were made at both the inlet and outlet sides of the grooves on the upper anvils so that no interference of the two wires occurs. An equivalent strain of 25 was introduced through this CHPT process.

Academic Significance and Societal Importance of the Research Achievements

これまで巨大ひずみ加工領域の大面積化には装置容量の限界という問題があった。本研究により、2本のワイヤー試料に連続的なひずみ導入のための加工原理を構築した。かつAl-Fe系合金にて鉄の過飽和固溶・析出を利用した特性向上を達成し、超微細粒を有する電線材料の開発可能性を示した。さらに、各ワイヤーの加工直径を調整することで、同時加工数を増大できる可能性を示し、巨大ひずみ加工法の一般化に繋がる結果を得られた。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2021 2020 2019

All Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 8 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] <i>In Situ</i> Synchrotron X-ray Analysis: Application of High-Pressure Sliding Process to Ti Allotropic Transformation2021

    • Author(s)
      Horita Zenji、Maruno Daisuke、Ikeda Yukimasa、Masuda Takahiro、Tang Yongpeng、Arita Makoto、Higo Yuji、Tange Yoshinori、Ohishi Yasuo
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 62 Issue: 2 Pages: 167-176

    • DOI

      10.2320/matertrans.MT-M2020314

    • NAID

      130007974693

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2021-02-01
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Continuous high-pressure torsion of pure Al and Al-2?wt% Fe alloy using multi-wires2021

    • Author(s)
      Masuda Takahiro、Hirosawa Shoichi、Horita Zenji
    • Journal Title

      Journal of Materials Science

      Volume: 56 Issue: 14 Pages: 8679-8688

    • DOI

      10.1007/s10853-020-05484-8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synchrotron X-ray diffraction observation of phase transformation during annealing of Si processed by high-pressure torsion2021

    • Author(s)
      Ikoma Yoshifumi、Yamasaki Terumasa、Masuda Takahiro、Tange Yoshinori、Higo Yuji、Ohishi Yasuo、McCartney Martha R.、Smith David J.、Horita Zenji
    • Journal Title

      Philosophical Magazine Letters

      Volume: - Issue: 6 Pages: 1-9

    • DOI

      10.1080/09500839.2021.1905192

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Achieving highly strengthened Al?Cu?Mg alloy by grain refinement and grain boundary segregation2020

    • Author(s)
      Masuda Takahiro、Sauvage Xavier、Hirosawa Shoichi、Horita Zenji
    • Journal Title

      Materials Science and Engineering: A

      Volume: 793 Pages: 139668-139668

    • DOI

      10.1016/j.msea.2020.139668

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mechanical properties and electrical conductivity of ultrafine-grained aluminum consolidated by high-pressure sliding2020

    • Author(s)
      Tang Yongpeng、Komatsu Takuya、Masuda Takahiro、Arita Makoto、Takizawa Yoichi、Yumoto Manabu、Otagiri Yoshiharu、Horita Zenji
    • Journal Title

      Materialia

      Volume: 14 Pages: 100916-100916

    • DOI

      10.1016/j.mtla.2020.100916

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Grain Refinement of AZ31 and AZ61 Mg Alloys through Room Temperature Processing by UP-Scaled High-Pressure Torsion2019

    • Author(s)
      Masuda Takahiro、Horita Zenji
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 60 Issue: 7 Pages: 1104-1110

    • DOI

      10.2320/matertrans.M2018308

    • NAID

      130007666636

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2019-07-01
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Production of Superplastic Ti–6Al–7Nb Alloy Using High-Pressure Sliding Process2019

    • Author(s)
      Watanabe Kyohei、Ashida Maki、Masuda Takahiro、Kral Petr、Takizawa Yoichi、Yumoto Manabu、Otagiri Yoshiharu、Sklenicka Vaclav、Hanawa Takao、Horita Zenji
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 60 Issue: 9 Pages: 1785-1791

    • DOI

      10.2320/matertrans.ME201924

    • NAID

      130007695408

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2019-07-01
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of Grain Refinement and Predeformation Impact by Severe Plastic Deformation on Creep in P92 Martensitic Steel2019

    • Author(s)
      Sklenicka Vaclav、Kral Petr、Dvorak Jiri、Takizawa Yoichi、Masuda Takahiro、Horita Zenji、Kucharova Kveta、Kvapilova Marie、Svobodova Marie
    • Journal Title

      Advanced Engineering Materials

      Volume: 22 Issue: 1 Pages: 1900448-1900448

    • DOI

      10.1002/adem.201900448

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 時効硬化型アルミニウム合金の固溶量と析出挙動に及ぼす高圧力の影響とその場解析2020

    • Author(s)
      増田高大, 廣澤渉一, 美藤正樹, 堀田善治, 新名亨, 入舩徹男, 肥後祐司, 丹下慶範, 大石泰生
    • Organizer
      第138回軽金属学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Impact of high-pressure thermal process on solid solubility and precipitation in age-hardenable aluminium alloys2020

    • Author(s)
      T. Masuda, S. Hirosawa, Z. Horita, T. Shinmei, T. Irifune, Y. Higo, Y. Tange, Y. Ohishi
    • Organizer
      The 17th International Conference on Aluminum Alloys (ICAA17)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 時効硬化型アルミニウム合金における固溶量と析出現象に及ぼす高圧力の影響2019

    • Author(s)
      増田高大、廣澤渉一、堀田善治、有田誠、新名亨、入舩徹男、肥後祐司、丹下慶範、大石泰生
    • Organizer
      第60回高圧討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] HPT(High-Pressure Torsion)で巨大ひずみ加工したAl-2%Fe合金の強度・導電性の評価2019

    • Author(s)
      増田高大、廣澤渉一、堀田善治
    • Organizer
      第137回軽金属学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Fabrication of supersaturated Al-2wt%Fe alloy through grain refinement by upsized High-Pressure Torsion2019

    • Author(s)
      Takahiro Masuda, Zenji Horita
    • Organizer
      14th International Aluminium Conference (INALCO2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2022-01-27  

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