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Advanced Design of Fracture-Resistant High Strength Steels - Paradigm Shift in Controlling Grain Boundary Segregation

Research Project

Project/Area Number 20H00296
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionTohoku University

Principal Investigator

Furuhara Tadashi  東北大学, 金属材料研究所, 教授 (50221560)

Co-Investigator(Kenkyū-buntansha) 榎木 勝徳  東北大学, 多元物質科学研究所, 助教 (60622595)
大谷 博司  公益財団法人豊田理化学研究所, フェロー事業部門, フェロー (70176923)
秋山 英二  東北大学, 金属材料研究所, 教授 (70231834)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥45,240,000 (Direct Cost: ¥34,800,000、Indirect Cost: ¥10,440,000)
Fiscal Year 2022: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
Fiscal Year 2021: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2020: ¥20,930,000 (Direct Cost: ¥16,100,000、Indirect Cost: ¥4,830,000)
Keywords鉄鋼材料 / 粒界偏析 / 元素間相互作用 / ナノ解析 / 原子ポテンシャルモデリング / 粒界腐食 / 高強度化 / 粒界構造 / 脆化
Outline of Research at the Start

材料は高強度化するほど結晶粒界が材料破壊の起点になるため、材料の高強度化設計を行うためには、粒界破壊を助長する不純物元素の局所的濃化(粒界偏析)の制御が必須である。そこで、本研究では粒界性格を決定した上での元素偏析の定量評価を行い、粒界偏析構造の理論的評価との比較、材料特性との相関を解明することで、鉄鋼の高強度化を阻む粒界脆化を克服するための先進材料設計原理を確立する。

Outline of Final Research Achievements

Grain boundaries (GB) in polycrystalline materials causes fracture because interatomic bonds are broken and the strengthening always leads to fracture. Therefore, it is essential to control local enrichment of impurity elements ("grain boundary segregation"), which contributes to GB fracture, for designing higher strength materials. Therefore, the objective of this study was to establish advanced material design principles to overcome intergranular embrittlement, which hinders high strength of steel, by quantitative evaluation of elemental segregation, theoretical evaluation of GB segregation structure, and elucidation of its correlation with properties. As a result, we were able to elucidate the relationship between GB structure and segregation behavior and elemental interactions of C and P at the GB, and clarify the effect of impurity element segregation on GB corrosion.

Academic Significance and Societal Importance of the Research Achievements

輸送機器や建築物などに使用される構造用金属材料を高強度化することで、小型化や軽量化、長寿命化により高効率・高安心社会構築に資することができる。多結晶材料である構造用金属材料を高強度化すると粒界からの破壊が生じるため、粒界破壊を抑制する材料設計指針を確立することが重要である。そこで本研究では、鉄鋼の粒界における元素の濃化に注目し、粒界構造と元素濃化量およびそれらが特性に及ぼす影響を明確にし、粒界強化鋼の設計指針を確立した。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Comments on the Screening Results   Annual Research Report
  • Research Products

    (45 results)

All 2023 2022 2021 2020

All Journal Article (12 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 12 results,  Open Access: 6 results) Presentation (32 results) (of which Int'l Joint Research: 9 results,  Invited: 5 results) Book (1 results)

  • [Journal Article] Current Status and Future Scope of Phase Diagram Studies2023

    • Author(s)
      M. Enoki, S. Minamoto, I. Ohnuma, T. Abe, H. Ohtani
    • Journal Title

      ISIJ International

      Volume: 63 Issue: 3 Pages: 407-418

    • DOI

      10.2355/isijinternational.ISIJINT-2022-408

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2023-03-15
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Modelling of the diffusional austenite-ferrite transformation2023

    • Author(s)
      Matthias Militzer, Christopher Hutchinson, Hatem Zurob and Goro Miyamoto
    • Journal Title

      International Materials Reviews

      Volume: - Issue: 7 Pages: 725-754

    • DOI

      10.1080/09506608.2022.2126257

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Heterogeneous segregation behavior of Nb at the stepped migrating interface during phase transformation2023

    • Author(s)
      Dong Haokai、Zhang Yongjie、Miyamoto Goro、Inomoto Masahiro、Zhang Weiwen、Liu Lehua、Chen Hao、Furuhara Tadashi
    • Journal Title

      Scripta Materialia

      Volume: 222 Pages: 115038-115038

    • DOI

      10.1016/j.scriptamat.2022.115038

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Sublattice alloy design of high-strength steels: Application of clustering and nanoscale precipitation of interstitial and substitutional solutes2023

    • Author(s)
      Tadashi Furuhara, Yongjie Zhang, Mitsutaka Sato, Goro Miyamoto, Masanori Enoki, Hiroshi Ohtani, Tokuteru Uesugi, Hiroshi Numakura
    • Journal Title

      Scripta Materialia

      Volume: 223 Pages: 115063-115063

    • DOI

      10.1016/j.scriptamat.2022.115063

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Strengthening of Low Carbon Steel by Nano-sized Vanadium Carbide in Ferrite and Tempered Martensite2022

    • Author(s)
      Yongjie Zhang, Mitsutaka Sato, Goro Miyamoto, Tadashi Furuhara
    • Journal Title

      ISIJ International

      Volume: 62 Issue: 10 Pages: 2016-2024

    • DOI

      10.2355/isijinternational.ISIJINT-2022-156

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2022-10-15
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Enhanced hardening by multiple microalloying in low carbon ferritic steels with interphase precipitation2022

    • Author(s)
      Zhang Yongjie、Miyamoto Goro、Furuhara Tadashi
    • Journal Title

      Scripta Materialia

      Volume: 212 Pages: 114558-114558

    • DOI

      10.1016/j.scriptamat.2022.114558

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Unraveling the effects of Nb interface segregation on ferrite transformation kinetics in low carbon steels2021

    • Author(s)
      Dong Haokai、Zhang Yongjie、Miyamoto Goro、Inomoto Masahiro、Chen Hao、Yang Zhigang、Furuhara Tadashi
    • Journal Title

      Acta Materialia

      Volume: 215 Pages: 117081-117081

    • DOI

      10.1016/j.actamat.2021.117081

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Current Understanding of Microstructure and Properties of Micro-Alloyed Low Carbon Steels Strengthened by Interphase Precipitation of Nano-Sized Alloy Carbides: A Review2021

    • Author(s)
      Zhang Y.-J.、Chandiran E.、Dong H.-K.、Kamikawa N.、Miyamoto G.、Furuhara T.
    • Journal Title

      JOM

      Volume: 73 Issue: 11 Pages: 3214-3227

    • DOI

      10.1007/s11837-021-04882-w

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electron Theory Calculation of Thermodynamic Properties of Steels and Its Application to Theoretical Phase Diagram of the Fe-Mo-B Ternary System2021

    • Author(s)
      Enoki Masanori、Takahashi Kota、Mitomi Soei、Ohtani Hiroshi
    • Journal Title

      Tetsu-to-Hagane

      Volume: 107 Issue: 11 Pages: 923-933

    • DOI

      10.2355/tetsutohagane.TETSU-2021-078

    • NAID

      130008109033

    • ISSN
      0021-1575, 1883-2954
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electron Theory Calculation of Thermodynamic Properties of Steels and Its Application to Theoretical Phase Diagram of the Fe–Mo–B Ternary System2020

    • Author(s)
      Enoki Masanori、Takahashi Kota、Mitomi Soei、Ohtani Hiroshi
    • Journal Title

      ISIJ International

      Volume: 60 Issue: 12 Pages: 2963-2972

    • DOI

      10.2355/isijinternational.ISIJINT-2020-189

    • NAID

      130007956944

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2020-12-15
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Calphad Modeling of LRO and SRO Using ab initio Data2020

    • Author(s)
      Enoki Masanori、Sundman Bo、Sluiter Marcel H. F.、Selleby Malin、Ohtani Hiroshi
    • Journal Title

      Metals

      Volume: 10 Issue: 8 Pages: 998-998

    • DOI

      10.3390/met10080998

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Thermodynamic Analysis of the Formation Process of Metastable Carbides in Iron–Carbon Martensite2020

    • Author(s)
      榎木勝徳,大谷博司
    • Journal Title

      Tetsu-to-Hagane

      Volume: 106 Issue: 6 Pages: 342-351

    • DOI

      10.2355/tetsutohagane.TETSU-2019-098

    • NAID

      130007849758

    • ISSN
      0021-1575, 1883-2954
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Pearlite growth kinetics in Fe-C-Mn eutectoid steels2023

    • Author(s)
      Y.-J. Zhang, T. Umeda, G. Miyamoto, T. Furuhara, S. Morooka
    • Organizer
      日本鉄鋼協会第185回春季講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Influence of prior austenite grain boundary (PAGB) misorientation on hydrogen-induced crack propagation in SCM435 tempered martensitic steel2023

    • Author(s)
      J.H. Kim, Y.-J. Zhang, G. Miyamoto, T. Hojo, M. Koyama, T. Furuhara
    • Organizer
      日本鉄鋼協会第185回春季講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 第一原理計算に基づく理論状態図の作成2023

    • Author(s)
      大谷博司, 榎木勝徳
    • Organizer
      日本金属学会 2023年春期 (第172回) 講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 粒界に偏析したリンが鉄の腐食に与える影響2022

    • Author(s)
      戸島一哉,味戸沙耶,張 咏杰,北條智彦,宮本吾郎,小山元道,古原 忠,秋山英二
    • Organizer
      腐食防食学会東北支部
    • Related Report
      2022 Annual Research Report
  • [Presentation] マルテンサイト鋼における水素脆性粒界クラックの 3 次元形態2022

    • Author(s)
      柴田曉伸,Ivan Gutierrrez-Urrutia, 中村晶子,原 徹,津﨑兼彰, 宮本吾郎
    • Organizer
      日本鉄鋼協会第183回春季講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Fe-C-Mn合金のパーライト変態におけるエネルギー散逸2022

    • Author(s)
      梅田岳昌, 張咏杰, 宮本吾郎, 古原忠, 諸岡聡
    • Organizer
      日本鉄鋼協会第184回秋季講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] α-Fe粒界へのN偏析濃度の定量測定2022

    • Author(s)
      唐国剣,宮本吾郎,古原忠
    • Organizer
      日本鉄鋼協会第184回秋季講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Comparison of driving force necessary for bainite and martensite transformations in steels2022

    • Author(s)
      Goro Miyamoto, Tadashi Furuhara
    • Organizer
      16th International Conference on Martensitic Transformation (ICOMAT2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Interface Engineering in Controlling Microstructure and Properties of Steels2022

    • Author(s)
      Tadashi Furuhara, Yongjie Zhang, Mitsutaka Sato, and Goro Miyamoto
    • Organizer
      7th International Conference on Advanced Steels (ICAS 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Interface in Solid-Solid Phase Transformation -Interplay of Kinetics and Crystallography2022

    • Author(s)
      Tadashi Furuhara, YongJie Zhang, Mitsutaka Sato, Goro Miyamoto
    • Organizer
      8th International Conference on Solid->Solid Phase Transformation in Inorganic Materials(PTM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Interaction of alloying element with migrating ferrite / austenite interface2022

    • Author(s)
      Goro Miyamoto, Tadashi Furuhara
    • Organizer
      8th International Conference on Solid->Solid Phase Transformation in Inorganic Materials(PTM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On the Role of Nb Interface Segregation in Ferrite Transformation of Low Carbon Steels2022

    • Author(s)
      Haokai Dong, Yongjie Zhang, Goro Miyamoto, Hao Chen, Zhigang Yang, Masahiro Inomoto, Tadashi Furuhara
    • Organizer
      8th International Conference on Solid->Solid Phase Transformation in Inorganic Materials(PTM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Interphase Precipitation of Nano-sized Alloy Carbide in V-Nb and V-Ti Multiple Microalloyed Low-carbon Steels2022

    • Author(s)
      Yongjie Zhang, Goro Miyamoto, Tadashi Furuhara
    • Organizer
      8th International Conference on Solid->Solid Phase Transformation in Inorganic Materials(PTM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of phosphorus segregation and grain boundary misorientation on intergranular corrosion of α-Fe2022

    • Author(s)
      Kazuya Tojima, Saya Ajito, Yongie Zhang, Tomohiko Hojo, Goro Miyamoto, Motomichi Koyama, Tadashi Furuhara, Eiji Akiyama
    • Organizer
      European Corrosion Congress, 2022, EUROCORR2022,
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ハイエントロピー合金における規則-不規則変態挙動の熱力学的解析2022

    • Author(s)
      大谷博司, 榎木勝徳
    • 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] Thermodynamic Analysis on a Formation Mechanism of Metastable Carbides During Tempering of Fe-C Martensite2022

    • Author(s)
      M. Enoki, H. Ohtani
    • Organizer
      MRS Fall Meeting (2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 第一原理クラスター展開を用いた合金中の SRO と MSAD の評価2022

    • Author(s)
      榎木勝徳, 大谷博司
    • Organizer
      第32回日本MRS年次大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 鉄-炭素系マルテンサイトにおける準安定炭化物の生成過程の熱力学的検討2022

    • Author(s)
      榎木勝徳, 大澤洋平, 大谷博司
    • Organizer
      日本鉄鋼協会 2022年春季 (第183回) 講演大会
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Presentation] FCC-FeにおけるB原子対の固溶状態と拡散挙動の電子論的考察2022

    • Author(s)
      榎木勝徳, 大谷博司
    • Organizer
      日本金属学会 2022年春期 (第170回) 講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ハイエントロピー合金の強度に及ぼす因子の熱力学的検討2022

    • Author(s)
      大谷博司, 榎木勝徳
    • Organizer
      日本金属学会 2022年春期 (第170回) 講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 鉄の粒界腐食に与えるリンの粒界偏析と結晶方位差の影響2022

    • Author(s)
      戸島一哉, 味戸沙耶,張 咏杰,北條智彦,宮本吾郎,小山元道,古原 忠,秋山英二
    • Organizer
      日本鉄鋼協会 2022年春季 (第183回) 講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] FCC-FeにおけるB原子対の固溶状態と拡散挙動の電子論的考察2022

    • Author(s)
      大谷博司, 榎木 勝徳
    • Organizer
      日本金属学会 2022年春期 (第170回) 講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ハイエントロピー合金の強度に及ぼす因子の熱力学的検討2022

    • Author(s)
      榎木 勝徳, 大谷博司
    • Organizer
      日本金属学会 2022年春期 (第170回) 講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] アトムプローブ解析を利用した鉄鋼材料のナノ析出制御2022

    • Author(s)
      張咏杰
    • Organizer
      日本鉄鋼協会 2022年春季 (第183回) 講演大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 炭素添加によるフェライト粒界でのリン偏析の抑制効果2021

    • Author(s)
      山崎康一郎, 張咏杰, 宮本吾郎, 古原忠
    • Organizer
      日本鉄鋼協会 2021年秋季 (第182回) 講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Effects of Carbon and Molybdenum Additions on Grain Boundary Segregation of Phosphorus in Ferrite2021

    • Author(s)
      Yongjie Zhang, Kohei Ikeda, Koichiro Yamasaki, Goro Miyamoto, Tadashi Furuhara
    • Organizer
      Virtual-Asia Steel 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] クラスター展開法を用いたCantor合金の平均二乗原子変位の評価2021

    • Author(s)
      榎木勝徳,大谷博司
    • 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] CrFeCoNiM (M=Pd, Pt)合金の熱力学的性質の評価2021

    • Author(s)
      大谷博司,榎木勝徳
    • 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] 粒界に偏析した リン が鉄の腐食に 与える影響2021

    • Author(s)
      戸島一哉,味戸沙耶,張 咏杰 ,北條智彦,宮本吾郎,小山元道,古原 忠,秋山英二
    • Organizer
      腐食防食学会 東北支部講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] フェライト粒界におけるP偏析におよぼす C, Mo添加の影響2020

    • Author(s)
      張咏杰, 池田幸平, 宮本吾郎, 古原忠, 木津谷茂樹, 高山直樹, 伊木聡
    • Organizer
      日本鉄鋼協会 第180回秋季講演大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 分子動力学シミュレーションの機械学習モデル2020

    • Author(s)
      顏 魯春, 榎木 勝徳, 大谷 博司
    • Organizer
      日本金属学会 2020年春期(第166回)講演大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電子論計算に基づく理論状態図の構築2020

    • Author(s)
      大谷 博司, 榎木 勝徳
    • Organizer
      日本金属学会 2020年秋期(第167回)講演大会
    • Related Report
      2020 Annual Research Report
  • [Book] ハイエントロピー合金2020

    • Author(s)
      乾 晴行 (編著)
    • Total Pages
      296
    • Publisher
      内田老鶴圃
    • ISBN
      9784753651375
    • Related Report
      2020 Annual Research Report

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

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