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Magnetic strengthening - Novel approach for material strengthening-

Research Project

Project/Area Number 19K22052
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionNational Institute for Materials Science (2021)
Kyoto University (2019-2020)

Principal Investigator

NIITSU Kodai  国立研究開発法人物質・材料研究機構, マテリアル基盤研究センター, 独立研究者 (90733890)

Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords格子欠陥 / 磁性 / 局在磁性 / 電子線ホログラフィー / 塑性変形 / 磁性転位 / 構造材料 / 材料強化 / 材料加工 / 転位 / 逆位相境界 / 磁性強化 / 部分転位
Outline of Research at the Start

従来の材料強化法は『転位の運動を弾性場相互作用の下以下に抑制するか』という描像に基づいた強化法である。一方、転位をはじめとする欠陥近傍の原子構造の乱れは、マトリクスとは異なる電子状態を局所的に実現することでもあることから、電磁気学的な物性もマトリクスと異なることが想定される。従って強化法の学理は、弾性場相互作用のみならず、電磁場との交差的・直接的相互作用も考慮されるべきであると考えられる。本研究では、このような磁気的にマトリクスとは異なる転位を導入した材料の変形素過程を調査し、転位が帯びる磁性のドラッグ効果や転位同士の磁気的近接効果に基づく、新たな強化機構―磁性強化―の確立と学理構築を目指す。

Outline of Final Research Achievements

Through mechanical tests under a magnetic field and magnetization measurements under the introduction of plastic strain, I succeeded in measuring magnetic properties in defects such as dislocations. I also succeeded in observing the magnetic order localized in dislocations by means of electron holography. It has been confirmed that the plastic deformation behavior of such materials changes depending on the presence or absence of a magnetic field, and the existence of magnetic strengthening, which is the goal of this study, was confirmed. In the future, the origin of this phenomenon will be clarified by investigating the dislocation substructures after deformation.

Academic Significance and Societal Importance of the Research Achievements

転位や逆位相強化に局在する磁気秩序の観測・観察に成功し、さらに磁場の有無に応じて塑性変形挙動が変化することを確認した。この挙動は、塑性流動において磁場が有意な影響をもたらしうることを示した成果であり従来の強化機構とは全く異なる、外場による材料強化が可能であることを示す。材料強化法を多様化に貢献することで構造材料をはじめとする材料の機能を豊かにすることが期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (40 results)

All 2022 2021 2020 2019 Other

All Journal Article (15 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 14 results,  Open Access: 3 results) Presentation (23 results) (of which Int'l Joint Research: 11 results,  Invited: 7 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results) (of which Overseas: 1 results)

  • [Journal Article] Geometrically stabilized skyrmionic vortex in FeGe tetrahedral nanoparticles2022

    • Author(s)
      Niitsu Kodai、Liu Yizhou、Booth Alexander C.、Yu Xiuzhen、Mathur Nitish、Stolt Matthew J.、Shindo Daisuke、Jin Song、Zang Jiadong、Nagaosa Naoto、Tokura Yoshinori
    • Journal Title

      Nature Materials

      Volume: 21 Issue: 3 Pages: 305-310

    • DOI

      10.1038/s41563-021-01186-x

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Magnetic flux in soft magnetic Fe-Si-B-P-Cu amorphous alloy containing nanocrystallites analyzed by electron holography2022

    • Author(s)
      Akase Zentaro、Kimura Kenta、Saito Tomohiro、Niitsu Kodai、Tanigaki Toshiaki、Iwasaki Yoh、Sharma Parmanand、Makino Akihiro、Shindo Daisuke
    • Journal Title

      Journal of Magnetism and Magnetic Materials

      Volume: 541 Pages: 168519-168519

    • DOI

      10.1016/j.jmmm.2021.168519

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phase equilibria among Fe2Al5 and its higher-ordered phases2021

    • Author(s)
      Hamada Tetsuya、Higashi Masaya、Niitsu Kodai、Inui Haruyuki
    • Journal Title

      Science and Technology of Advanced Materials

      Volume: 22 Issue: 1 Pages: 373-385

    • DOI

      10.1080/14686996.2021.1915691

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Element dependence of local disorder in medium-entropy alloy CrCoNi2021

    • Author(s)
      Hanasaki N.、Oda M.、Niitsu K.、Ehara K.、Murakawa H.、Sakai H.、Nitani H.、Abe H.、Sagayama H.、Uetsuka H.、Karube T.、Inui H.
    • Journal Title

      AIP Advances

      Volume: 11 Issue: 12 Pages: 125216-125216

    • DOI

      10.1063/5.0072766

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inorganic process for wet silica-doping of calcium phosphate2021

    • Author(s)
      Sugiura Yuki、Niitsu Kodai、Saito Yasuko、Endo Takashi、Horie Masanori
    • Journal Title

      RSC Advances

      Volume: 11 Issue: 20 Pages: 12330-12335

    • DOI

      10.1039/d1ra00288k

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of annealing on hardness, yield strength and dislocation structure in single crystals of the equiatomic Cr-Mn-Fe-Co-Ni high entropy alloy2021

    • Author(s)
      Zhou Dengshan、Chen Zhenghao、Ehara Kazuki、Nitsu Kodai、Tanaka Katsushi、Inui Haruyuki
    • Journal Title

      Scripta Materialia

      Volume: 191 Pages: 173-178

    • DOI

      10.1016/j.scriptamat.2020.09.039

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Aesthetic Silver-Doped Octacalcium Phosphate Powders Exhibiting Both Contact Antibacterial Ability and Low Cytotoxicity2020

    • Author(s)
      Sugiura Yuki、Obika Hideki、Horie Masanori、Niitsu Kodai、Makita Yoji
    • Journal Title

      ACS Omega

      Volume: 5 Issue: 38 Pages: 24434-24444

    • DOI

      10.1021/acsomega.0c02868

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Thermal activation of stress-induced martensitic transformation in Ni-rich Ti-Ni alloys2020

    • Author(s)
      Niitsu K.、Date H.、Kainuma R.
    • Journal Title

      Scripta Materialia

      Volume: 186 Pages: 263-267

    • DOI

      10.1016/j.scriptamat.2020.05.010

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Temperature dependence of magnetic exchange stiffness in iron and nickel2020

    • Author(s)
      Niitsu Kodai
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 53 Issue: 39 Pages: 39LT01-39LT01

    • DOI

      10.1088/1361-6463/ab9672

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Multiple strengthening mechanisms in high strength ultrafine-grained Al?Mg alloys2020

    • Author(s)
      Wang Hao、Geng Hongwei、Zhou Dengshan、Niitsu Kodai、Mur?nsky Ondrej、Zhang Deliang
    • Journal Title

      Materials Science and Engineering: A

      Volume: 771 Pages: 138613-138613

    • DOI

      10.1016/j.msea.2019.138613

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Temperature dependence of exchange stiffness in an off-stoichiometric Ni2MnIn Heusler alloy2020

    • Author(s)
      Niitsu K.、Xu X.、Umetsu R. Y.、Kainuma R.、Harada K.
    • Journal Title

      Physical Review B

      Volume: 101 Issue: 1 Pages: 014443-014443

    • DOI

      10.1103/physrevb.101.014443

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Toward the quantitative the interpretation of hole-free phase plate images in a transmission electron microscope.2020

    • Author(s)
      Harada Ken、Malac Marek、Hayashida Misa、Niitsu Koudai、Shimada Keiko、Homeniuk Darren、Beleggia Marco
    • Journal Title

      Ultramicroscopy

      Volume: 209 Pages: 112875-112875

    • DOI

      10.1016/j.ultramic.2019.112875

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Ti-Enriched Al <sub>2</sub>O <sub>3</sub>/Cu Interfaces in a Cu-Al <sub>2</sub>O <sub>3</sub> Alloy2019

    • Author(s)
      Zhou Dengshan、Jin Shenbao、Yang Chao、Niitsu Kodai、Sha Gang、Zhang Deliang
    • Journal Title

      SSRN Electronic Journal

      Volume: -

    • DOI

      10.2139/ssrn.3454925

    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Journal Article] Electron Holography on Fraunhofer Diffraction Using Double Slit2019

    • Author(s)
      Harada Ken、Niitsu Kodai、Shimada Keiko、Kodama Tetsuji、Akashi Tetsuya、Ono Yoshimasa A.、Shindo Daisuke、Shinada Hiroyuki、Mori Shigeo
    • Journal Title

      Microscopy and Microanalysis

      Volume: 25 Issue: S2 Pages: 102-103

    • DOI

      10.1017/s1431927619001247

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Electron Holography and Magnetotransport Measurements Reveal Stabilized Magnetic Skyrmions in Fe1?xCoxSi Nanowires2019

    • Author(s)
      Mathur Nitish、Stolt Matthew J.、Niitsu Kodai、Yu Xiuzhen、Shindo Daisuke、Tokura Yoshinori、Jin Song
    • Journal Title

      ACS Nano

      Volume: 13 Issue: 7 Pages: 7833-7841

    • DOI

      10.1021/acsnano.9b02130

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] ミディアムエントロピー合金における局所構造2022

    • Author(s)
      花咲徳亮、小田昌治、古谷大樹、新津甲大、陳正昊、江原和輝、村川寛、酒井英明、仁谷浩明、阿部仁、佐賀山基、乾晴行
    • Organizer
      日本金属学会2022年春期講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Plastic deformation behavior and microstructural evolution of a Cr-Co-Ni medium entropy alloy2021

    • Author(s)
      Kodai Niitsu, Kazuki Ehara, Kyosuke Kishida, Haruyuki Inui
    • Organizer
      THERMEC'2020 International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetic configuration under geometrical confinement2020

    • Author(s)
      KODAI NIITSU
    • Organizer
      8th INTERM 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Plastic Deformation of Single Crystals of a Cr-Co-Ni Equiatomic Medium Entropy Alloy2020

    • Author(s)
      Ashif Equbal, Kazuki Ehara, Makoto Asakura, Kodai Niitsu, Kyosuke Kishida, Haruyuki Inui
    • Organizer
      2020 MRS fall meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Phase equilibria and crystal structures of highly ordered intermetallic compounds of Fe2Al5 phases with the framework structure of η-Fe2Al5 phase2020

    • Author(s)
      Tetsuya Hamada, Ryutaro Sakai, Masaya Higashi, Kodai Niitsu, Haruyuki Inui
    • Organizer
      2020 MRS fall meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Plastic deformation behavior and microstructural evolution of a Cr-Co-Ni medium entropy alloy2020

    • Author(s)
      Kodai Niitsu, Kazuki Ehara, Kyosuke Kishida, Haruyuki Inui
    • Organizer
      Thermec'2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Fe, Ni薄膜内に導入される磁壁の幅とその温度依存性2020

    • Author(s)
      新津 甲大、原田 研、進藤 大輔
    • Organizer
      日本金属学会2020年春期(第166回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Magnetic texture under geometrical confinement2020

    • Author(s)
      Kodai Niitsu
    • Organizer
      7th INTERM 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] η-Fe2Al5の高次規則相の結晶構造と相平衡2020

    • Author(s)
      濱田 鉄也、境 龍太郎、新津 甲大、乾 晴行
    • Organizer
      日本金属学会2020年春期(第166回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Fe-Al B2相に導入した転位近傍の磁気特性2020

    • Author(s)
      新津 甲大、岩村 泰樹、乾 晴行
    • Organizer
      日本金属学会2020年春期(第166回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Ti-Zr-Nb-Hf-Ta等原子量合金の低温圧縮変形挙動2020

    • Author(s)
      松浦 周太郎、岸田 恭輔、新津 甲大、乾 晴行
    • Organizer
      日本金属学会2020年春期(第166回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Effect of nitrogen addition on the strength and ductility of CrCoNi equiatomic alloys2020

    • Author(s)
      李 楽、陳正昊、新津 甲大、乾 晴行
    • Organizer
      日本金属学会2020年春期(第166回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] η-Fe2Al5単結晶マイクロピラーの塑性変形と変形組織観察2020

    • Author(s)
      王 小豊、陳 正昊、新津 甲大、岸田 恭輔、乾 晴行
    • Organizer
      日本金属学会2020年春期(第166回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Materials Parameters in Designing FCC High-entropy Alloys2020

    • Author(s)
      Haruyuki Inui, Koudai Niitsu, Kyosuke Kishida, Easo George
    • Organizer
      TMS 2020 Annual Meeting & Exhibition
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Magnetic transition in ordered BCC phases of Fe-Al alloys2019

    • Author(s)
      K. Abe, Y. Kimura, X. Xu, K. Niitsu, T. Omori, R. Kainuma
    • Organizer
      CALPHAD 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of Heat-Treatment on Mechanical Properties of Equiatomic CrMnFeCoNi High-Entropy Alloy and Its Derivative Equiatomic Quaternary and Ternary Medium-Entropy Alloys2019

    • Author(s)
      Haruyuki Inui, Kodai Niitsu, Kyosuke Kishida
    • Organizer
      2019 MRS FALL MEETING & EXHIBIT
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Single-crystal Mechanical Properties of Equiatomic CrMnFeCoNi High-entropy Alloy and Its Derivative Equiatomic Quaternary and Ternary Medium-entropy Alloys2019

    • Author(s)
      Haruyuki Inui,Kyosuke Kishida, Koudai Niitsu, Easo George
    • Organizer
      World Congress on High Entropy Alloys (HEA 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] FCCハイエントロピー合金の塑性変形と微視組織2019

    • Author(s)
      新津甲大,江原和輝,Ashif Equbal,浅倉誠仁,岸田恭輔,乾 晴行
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] η-Fe2Al5の高次規則相と相平衡2019

    • Author(s)
      濱田鉄也,境龍太郎,新津甲大,乾 晴行
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] NiCoMnIn合金における磁場誘起マルテンサイト変態ダイナミクス2019

    • Author(s)
      矢野凱己,新津甲大,貝沼亮介,乾 晴行
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Cr-Co-Ni等原子量合金単結晶の塑性変形における熱活性化過程2019

    • Author(s)
      江原和輝,新津甲大,岸田恭輔,乾 晴行
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Ti-Zr-Nb-Hf-Ta等原子量合金のすべり面解析2019

    • Author(s)
      松浦周太郎,岸田恭輔,新津甲大,乾 晴行
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Isothermal nature of magnetc-feld-induced martensitc transformaton in NiCoMnIn metamagnetc shape memory alloy2019

    • Author(s)
      Yoshiki Yano, Kodai Niitsu, Ryosuke Kainuma, Haruyuki Inui
    • Organizer
      Intermetallics 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] 個人ホームページ

    • URL

      https://kodai-niitsu.jimdofree.com/

    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] Holography reconstruction method and program2020

    • Inventor(s)
      原田研、新津甲大、 嶌田惠子
    • Industrial Property Rights Holder
      原田研、新津甲大、 嶌田惠子
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2020 Research-status Report
    • Overseas

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Published: 2019-07-04   Modified: 2025-01-30  

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