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Innovation of soft magnetic permendur alloys based on surface-induced recrystallization

Research Project

Project/Area Number 20H02474
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26050:Material processing and microstructure control-related
Research InstitutionIbaraki University

Principal Investigator

Sato Shigeo  茨城大学, 応用理工学野, 教授 (40509056)

Co-Investigator(Kenkyū-buntansha) 鈴木 茂  東北大学, マイクロシステム融合研究開発センター, 教授 (40143028)
星川 晃範  茨城大学, フロンティア応用原子科学研究センター, 准教授 (60391257)
永野 隆敏  茨城大学, 理工学研究科(工学野), 講師 (70343621)
小貫 祐介  茨城大学, フロンティア応用原子科学研究センター, 産学官連携助教 (50746998)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2023: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
Keywordsパーメンジュール合金 / 集合組織 / 相変態 / 中性子回折 / 軟磁気特性
Outline of Research at the Start

軟磁気特性に優れたパーメンジュール(Fe-Co)合金の課題は、加工性と製造コストである。その問題を解決するため「結晶方位による表面エネルギーの違い」と「拡散誘起の相変態」を駆動力とした結晶方位制御プロセスを実現する。Coを20~30%まで減量すると、透磁率は低下するため、この問題解決に透磁率に優れた{100}面を板面に持つ結晶方位制御を行う。この組織制御はMn、炭素を微量添加し、脱Mn熱処理により表面エネルギーの低い{100}粒を板表層に核生成させ、続く脱炭熱処理においてオーステナイト→フェライト変態を駆動力とした粒成長を表層の{100}粒から生じさせる。

Outline of Final Research Achievements

The purpose of this project is to realize a crystal orientation control process for permendur (Fe-Co) alloys driven by the “difference in surface energy depending on crystal orientation” and “diffusion-induced phase transformation”. When the Co content of permendur alloys is reduced to 20-30%, the magnetic permeability decreases. To solve this problem, it is essential to control the crystallographic orientation of the plate surface with {100} planes, which have excellent permeability. Therefore, {100} grains with low surface energy are nucleated and grown on the plate surface layer by Mn and de-Mn heat treatment of the permendur alloy. We optimized the heat treatment temperatures based on the phase transformation temperatures observed from neutron diffraction, and succeeded in forming a {100} recrystallized texture on the surface.

Academic Significance and Societal Importance of the Research Achievements

熱処理に伴う組成変化を表面で生じさせ、それに伴う相変態を駆動力とした表面再結晶現象はほぼ未開拓の学術分野である。本研究ではこの表面再結晶を利用したND//{100}集合組織制御を実現している点に学術的意義がある。特に、この手法を優れたCoを減量したパーメンジュール合金に適用したことにオリジナリティがある。{100}集合組織を持つCo減量パーメンジュール合金は軟磁気特性と高い飽和磁束密度を有することから、ドローンやeVTOLなどに向け、軽量高出力のモータコアとして活用されることが期待される。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (25 results)

All 2022 2021 2020 Other

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 6 results) Presentation (16 results) (of which Int'l Joint Research: 6 results) Remarks (1 results)

  • [Journal Article] Characteristic Twin Formation in Body-centered Cubic Fe–Ga Alloy Single Crystals with Different Orientations2022

    • Author(s)
      Shigeru SUZUKI, Kazuhiro MIZUSAWA, Toru KAWAMATA, Rie Yamauchi, UMETSU, Tsuyoshi KUMAGAI, Tsuguo FUKUDA, Shigeo SATO
    • Journal Title

      ISIJ International

      Volume: 62 Issue: 5 Pages: 957-962

    • DOI

      10.2355/isijinternational.ISIJINT-2021-345

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2022-05-15
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Microstructure formation and carbon partitioning with austenite decomposition during isothermal heating process in Fe-Si-Mn-C steel monitored by in situ time-of-flight neutron diffraction2022

    • Author(s)
      Yusuke Onuki, Kazuki Umemura, Kazuki Fujiwara, Yasuaki Tanaka, Toshiro Tomida, Kaori Kawano, Shigeo Sato
    • Journal Title

      Metals

      Volume: 12 Issue: 6 Pages: 957-957

    • DOI

      10.3390/met12060957

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Texture evolutions in aluminum and Al-3%Mg alloy subjected to shear deformation and subsequent annealing2021

    • Author(s)
      Yoshimasa Takayama, Yihe Xu, Tsuyoshi Yoshida, Hiroki Tanaka, Yusuke Onuki and Shigeo Sato
    • Journal Title

      Materials Science and Engineering

      Volume: 1121 Issue: 1 Pages: 012017-012017

    • DOI

      10.1088/1757-899x/1121/1/012017

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Grain growth in soft magnetic ferritic stainless steels under compressive stresses at high temperatures2021

    • Author(s)
      S. Suzuki, Y. Onuki, M. Uchida, S. Sato, T. Naruse, M. Watanabe, T. Sato and T. Ebata
    • Journal Title

      Materials Science and Engineering

      Volume: 1121 Issue: 1 Pages: 012020-012020

    • DOI

      10.1088/1757-899x/1121/1/012020

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Variant Selection in Phase Transformation and its Influence on Texture and Martensite Starting Temperature in Steel2021

    • Author(s)
      T. Tomida and S. Sato
    • Journal Title

      Materials Science and Engineering

      Volume: 1121 Issue: 1 Pages: 012021-012021

    • DOI

      10.1088/1757-899x/1121/1/012021

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Texture Memory in Hexagonal Metals and Its Mechanism2021

    • Author(s)
      Toshiro Tomida, Sven C. Vogel , Yusuke Onuki and Shigeo Sato
    • Journal Title

      Metals

      Volume: 11 Issue: 10 Pages: 1653-1653

    • DOI

      10.3390/met11101653

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Characterization of Dislocation Rearrangement in FCC Metals during Work Hardening Using X-ray Diffraction Line-Profile Analysis2020

    • Author(s)
      Nakagawa Koutarou、Hayashi Momoki、Takano-Satoh Kozue、Matsunaga Hirotaka、Mori Hiroyuki、Maki Kazunari、Onuki Yusuke、Suzuki Shigeru、Sato Shigeo
    • Journal Title

      Quantum Beam Science

      Volume: 4 Issue: 4 Pages: 36-36

    • DOI

      10.3390/qubs4040036

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] In Situ Observation for Deformation-Induced Martensite Transformation (DIMT) during Tensile Deformation of 304 Stainless Steel Using Neutron Diffraction. PART I: Mechanical Response2020

    • Author(s)
      Onuki Yusuke、Sato Shigeo
    • Journal Title

      Quantum Beam Science

      Volume: 4 Issue: 3 Pages: 31-31

    • DOI

      10.3390/qubs4030031

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Fe-Mn-Si-0.6%C 鋼のα→γ→α 繰り返し変態の集合組織変化とバリアント選択則2022

    • Author(s)
      富田俊郎, 小貫祐介, 梅村和希, 田中泰明,藤原知哉,諏訪嘉宏,河野佳織, 佐藤成男
    • Organizer
      日本金属学会 第1回 結晶性材料の結晶配向評価および結晶方位解析技術研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 中性子回折を用いた低合金TRIP鋼の熱処理中における組織形成過程の観察2022

    • Author(s)
      河原幸汰, 梅村和希, 小貫祐介, 星川晃範, 富田俊郎, 佐藤成男
    • Organizer
      第58回X線分析討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 金属材料の熱処理に伴うGN転位とSS転位の回復挙動2022

    • Author(s)
      佐藤成男
    • Organizer
      日本鉄鋼協会シンポジウム「鉄鋼材料特性改善に資する評価・分析・解析の進歩」
    • Related Report
      2022 Annual Research Report
  • [Presentation] Neutron metallurgy by using iMATERIA: Time-Of-Flight type 9owder diffraction instrument2022

    • Author(s)
      Yusuke Onuki, Toshiro Tomida, Shigeo Sato
    • Organizer
      3-day International Conference on Materials Science
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 機能性多結晶鉄合金における残留応力の評価2022

    • Author(s)
      鈴木茂,佐藤成男,田中俊一郎
    • Organizer
      日本金属学会2022年秋期(第171回)講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 中性子回折を利用した純鉄98%圧延板の結晶方位別転密度評価2022

    • Author(s)
      田中孝明,髙城重宏,小貫祐介, 佐藤成男
    • Organizer
      金属第62回 鉄鋼第65回 中国四国支部講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 中性子ラインプロファイル解析による圧延板の結晶方位別転位密度評価2022

    • Author(s)
      田中孝明, 髙城重宏, 小貫祐介, 佐藤成男
    • Organizer
      日本鉄鋼協会第183回春季講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] A mechanism of austenite grain size dependency of Ms by stored elastic energy in neighbor parent grains2022

    • Author(s)
      Toshiro Tomida, Shigeo Sato
    • Organizer
      16th International Conference on Martensitic Transformation (ICOMAT 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 弾性異方性の大きい鉄合金における微小ひずみの評価2021

    • Author(s)
      鈴木茂、川又透、梅津理恵、佐藤成男、田中俊一郎
    • Organizer
      日本金属学会2021年秋期(第169回)講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Tiの集合組織記憶機構の解析2021

    • Author(s)
      富田俊郎、Sven C. Vogel、小貫祐介、佐藤成男
    • Organizer
      第4回金属・無機・有機材料の結晶方位解析と応用技術研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] A mechanism of austenite grain size dependency of Ms by stored elastic energy in neighbor parent grains2021

    • Author(s)
      Toshiro Tomida, Shigeo Sato
    • Organizer
      16th International Conference on Martensitic Transformation (ICOMAT 2022)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CP-TiのHCP→BCC→HCP変態における集合組織記憶効果とその機構2021

    • Author(s)
      富田俊郎、小貫祐介、佐藤成男
    • Organizer
      日本鉄鋼協会第181回春季講演大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] SUS304ステンレス鋼におけるγ→ε→α’加工誘起マルテンサイト変態2021

    • Author(s)
      小貫祐介、佐藤成男
    • Organizer
      日本鉄鋼協会第181回春季講演大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Variant selection in phase transformation and its influence on texture and martensite starting temperature in steel2021

    • Author(s)
      T. Tomida, S. Sato
    • Organizer
      The 19th International Conference on Textures of Materials (ICOTOM 19)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of texture memory in Ti by time-of-flight neutron diffraction and texture prediction via harmonic method2021

    • Author(s)
      T. Tomida, Y. Onuki, S. C. Vogel, S. Sato
    • Organizer
      The 19th International Conference on Textures of Materials (ICOTOM 19)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Interplay between phase transformation and dislocation evolution in iron-based shape memory alloys2021

    • Author(s)
      S. Sato, K. Hanawa, Y. Onuki, Y. Uemura, A. Hoshikawa, H. Otsuka, Y. Chiba, S. Suzuki
    • Organizer
      The 19th International Conference on Textures of Materials (ICOTOM 19)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 量子ビーム組織解析研究室

    • URL

      http://crystal.appl-beam.ibaraki.ac.jp/index.html

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report 2020 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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