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Development for new generation laminated high-strength steel

Research Project

Project/Area Number 17K14844
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Material processing/Microstructural control engineering
Research InstitutionTottori University

Principal Investigator

MATSUNO Takashi  鳥取大学, 工学研究科, 准教授 (30781687)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsDual Phase steel / メゾスケール解析 / 異方性 / 鋼材強度 / 2相組織鋼 / 高強度 / 曲げ強度 / 数値シミュレーション / 曲げ変形 / DP鋼 / 高張力鋼 / 塑性異方性解析 / 微視組織設計 / 有限要素法解析 / 複合材料・物性 / シミュレーション工学 / 機械材料・材料力学
Outline of Final Research Achievements

The study considered morphology of micro structure in high strength steels for high bending strength. Dual phase steels, which are composed of hard island-shaped phase embedded in soft phase matrix, was focused. Due to the difference for actual sample preparation that include hard phases with desired morphology, virtual material development and mechanical test on the computer were conducted. High bending strength which was intended in this study required strong anisotropy of tensile response; and the virtual material tests clarified that the fibrous hard phase induced such strong anisotropy. This strong anisotropy expressed up to 10 % material deformation, and diminished after the 10 % material deformation.

Academic Significance and Societal Importance of the Research Achievements

鋼材の曲げ強度は自動車用部材において重要な役割を果たす.強度が高ければその分だけ鋼材の厚さを減らせるので,耐衝突性能を維持しながら軽量化を果たすことが可能となる.本課題における研究成果は,これまでにない異方性を活用しての曲げ強度向上の糸口を得ることができたという点において社会的な意義があるものと考える.
また,鋼材の微視的な構造による異方性の発現が極めて複雑におけるという点が新たに明らかとなった.これらを調整,最適化していくことで曲げ強度向上のブレイクスルーを得る可能性がある.新たな研究テーマの広がりとして学術的な意義があったものと考える.

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (5 results)

All 2020 2019 2018 2017

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (4 results) (of which Invited: 2 results)

  • [Journal Article] Three-dimensional finite element analysis of representative volume elements for characterizing the effects of martensite elongation and banding on tensile strength of ferrite-martensite dual-phase steels2019

    • Author(s)
      Matsuno Takashi、Yoshioka Tomoya、Watanabe Ikumu、Alves Luis
    • Journal Title

      International Journal of Mechanical Sciences

      Volume: 163 Pages: 105133-105133

    • DOI

      10.1016/j.ijmecsci.2019.105133

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 有限要素法を用いた Dual Phase 鋼の微視的破壊条件の同定と硬質組織形態制御への発展2020

    • Author(s)
      松野崇
    • Organizer
      日本鉄鋼協会・日本金属学会 中国四国支部第69回材質制御研究会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] マルチフェーズ鋼の変形抵抗・延性破壊における第2層組織の影響の解析2019

    • Author(s)
      松野崇
    • Organizer
      日本鉄鋼協会 第3回「オーステナイトを含む複相鋼における不均一変形」フォーラム
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 数値計算を用いたDual Phase鋼異方性に及ぼす硬質組織形態の影響の解析2018

    • Author(s)
      吉岡知哉,松野崇,Luis Alves
    • Organizer
      日本塑性加工学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 延伸マルテンサイトを含む二相組織鋼の塑性異方性の有限要素解析2017

    • Author(s)
      松野 崇
    • Organizer
      日本鉄鋼協会第174回秋季講演大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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