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Study about influence factors and mechanism of meso-scale microstructural deformation to achieve active controls of microstructural texture

Research Project

Project/Area Number 19H02456
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26040:Structural materials and functional materials-related
Research InstitutionToyohashi University of Technology

Principal Investigator

Kobayashi Masakazu  豊橋技術科学大学, 工学(系)研究科(研究院), 教授 (20378243)

Co-Investigator(Kenkyū-buntansha) 三浦 博己  豊橋技術科学大学, 工学(系)研究科(研究院), 教授 (30219589)
青葉 知弥  木更津工業高等専門学校, 機械工学科, 准教授 (50757143)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2020: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2019: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Keywords結晶組織 / 局所ひずみ / 集合組織 / 圧延 / 引張 / 三次元 / 局所塑性ひずみ / 放射光 / X線CT / アルミニウム合金 / 不均一変形 / すべり変形 / 結晶方位 / 結晶塑性
Outline of Research at the Start

多結晶材料中の内部変形メカニズム(結晶塑性のすべり・回転と隣接結晶粒との相互作用)を明らかにし,構造用金属材料の強度と延性(成形性および靱性)両立のために,積極的な集合組織制御を可能とすることを目指す。添加元素量で圧延集合組織が変化する多結晶合金の内部組成ひずみとミクロ組織を高分解能トモグラフィによる3D/4D非破壊測定・解析技術で計測する。そして,結晶塑性シミュレーション解析で集合組織変化に伴い変化する結晶粒内のすべり機構メカニズムを明らかにする。さらに,結晶粒組織間の相互作用関係をデータベース化,データサイエンスによる分析を行うことで,支配的に集合組織変化を引き起こす因子を詳らかにする。

Outline of Final Research Achievements

It is generally difficult to measure internal plastic strain in a deformed metal. In this study, internal plastic strain and microstructures were measured in the polycrystalline metal whose rolling texture is changed with amount of additive elements, by means of 3D/4D non-destructive inspection and analysis of high resolution X-ray CT utilizing synchrotron radiation in SPring-8. By data analysis, we approached controlling factors caused strain concentration and texture change. It was found that the importance is interaction between neighbor grains in aggregated grain structure. We discussed strain concentration and orientation change mechanisms that are related with different property of neighbor grains by using crystal plasticity simulation analysis. Since the factor that can be connected with concentration of internal deformation made clear for metals, the result of this study helps to build the base of method to control texture change positively to give both strength and ductility.

Academic Significance and Societal Importance of the Research Achievements

圧延は金属材料の生産工程で常用される手法であり,産業応用上重要なプロセスである。古くから研究も為されている故,多くの研究者が十分理解できていると思っているかも知れない。しかし,実際は単に古典的理論が信じられているのみで,結晶塑性論の示すような結晶粒レベルの変形が圧延集合組織形成へ影響するかどうかは,高度な計測・解析技術が必要となるため調査が進んでいない。計測技術を有した我々が,放射光を利用して,そこにメスを入れ,結晶方位が要因で必ずしも優位な変形を起しているわけではないことを明らかにした。これは新たな結晶塑性理論の発達や集合組織制御に新しい展開を引き起こす引き金となるものである。

Report

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

    (7 results)

All 2022 2021 2020 Other

All Int'l Joint Research (3 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] デンマーク工科大学(デンマーク)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Technical University of Denmark/Xnovo Technology ApS(デンマーク)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Technical University of Denmark(デンマーク)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Investigation of Relationships between Grain Structure and Inhomogeneous Deformation by Means of Laboratory-Based Multimodal X-Ray Tomography: Strain Accuracy Analysis2021

    • Author(s)
      Kobayashi M.、Zhang Y.、Ishikawa H.、Sun J.、Oddershede J.、Juul Jensen D.、Miura H.
    • Journal Title

      Experimental Mechanics

      Volume: - Issue: 5 Pages: 817-828

    • DOI

      10.1007/s11340-021-00701-0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 3D/4D characterization of strain distribution evolving within the microstructure during plastic deformation2020

    • Author(s)
      Kobayashi Masakazu、Miura Hiromi
    • Journal Title

      Current Opinion in Solid State and Materials Science

      Volume: 24 Issue: 3 Pages: 100835-100835

    • DOI

      10.1016/j.cossms.2020.100835

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Al-Mg(-Pb)合金の圧延における不均一変形の三次元計測2022

    • Author(s)
      松原拓也,小林正和,古田将吾,三浦博己
    • 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] Investigation of relationship between grain structure and inhomogeneous deformation by means of a laboratory-based multimodal X-ray tomography2021

    • Author(s)
      Masakazu Kobayashi, Yubin Zhang, Haruki Ishikawa, Dorte Juul Jensen, Jun Sun, Jette Oddershede, Hiromi Miuraa1
    • Organizer
      The 19th International Conference on Textures of Materials (ICOTOM 19)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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