• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Observation of local deformation behavior of microstructure formed through displacive transformation

Research Project

Project/Area Number 19H02475
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 InstitutionThe University of Tokyo

Principal Investigator

Inoue Junya  東京大学, 生産技術研究所, 教授 (70312973)

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: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2020: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Keywordsデジタルホログラフィック顕微鏡 / 変位型変態 / 組織形成 / 局所変形挙動 / Wavelet変換 / 変位断型変態
Outline of Research at the Start

材料の局所的な変形挙動の解明に向け,AFMやSEM/EBSD,TEMなどを用いた解析が広く用いられているものの,リアルタイム性と計測精度の両立には限界がある。本研究では,変態ひずみや塑性変形により生じる表面起伏のナノスケールの変化をデジタルホログラフィック顕微鏡でリアルタイムに大量に取得することで,高速度・高精度・高解像度に局所変形を再構築する革新的なシステムの構築する。

Outline of Final Research Achievements

The analysis of heterogeneous deformation behavior at the grain level has been attracting attention, and considered as an important technology for achieving higher performance in metallic materials. Therefore, analysis using AFM, SEM/EBSD, TEM, etc. are widely used to elucidate local deformation behavior. There is, however, a limit to both real-time performance and measurement accuracy. Accordingly, in this study, we aimed to construct a new method to measure nano-scale changes in surface undulations caused by transformation strain and plastic deformation in real time.
As a result, we developed a 3D shape reconstruction method using the Wavelet transform, and enabled the reproduction of fine surface undulations.

Academic Significance and Societal Importance of the Research Achievements

鉄鋼材料の高機能化や高強度化の鍵として,近年マルテンサイト変態等の変位型相変態が盛んに研究されている。この様な組織形成を理解し,構造材料の長期的な信頼性を向上する上では,形成相やその周辺で生じる変形挙動の解明が極めて重要である。特に,高強度化と高延性化の両立を目指しす上では,形成相の形態や体積率の制御が重要であり,その最適化には異相界面や高強度相で生じるひずみの局所化挙動の理解が不可欠となっている。本研究は,この様な変位型変態組織の形成過程や変形挙動を支配するメカニズムを解明する上で不可欠となる,新たな計測手法を提供するものである。

Report

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

    (4 results)

All 2022 2020 2019

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

  • [Journal Article] <i>In-situ</i> Measurement of Bainitic Transformation Process using Digital Holographic Microscope2022

    • Author(s)
      林 成榕, 関戸健治, 金浩赫, 井上純哉
    • Journal Title

      Tetsu-to-Hagane

      Volume: 108 Issue: 6 Pages: 360-369

    • DOI

      10.2355/tetsutohagane.TETSU-2021-128

    • ISSN
      0021-1575, 1883-2954
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of Digital Holographic Microscope for <i>In-Situ</i> Surface Relief Measurement of Low-Carbon Steel2020

    • Author(s)
      J. Inoue, S. Komine, R. Misaki, and K. Sekido
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 61 Issue: 1 Pages: 42-48

    • DOI

      10.2320/matertrans.MT-MJ2019005

    • NAID

      130007772505

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2020-01-01
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] In-situ measurement of surface relief effect of displacive transformation in low-carbon steels2020

    • Author(s)
      井上純哉
    • Organizer
      Thermec 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] DHMを用いた低炭素マルテンサイト変態のその場観察2019

    • Author(s)
      井上純哉,小峯周平
    • Organizer
      日本金属学会2019年秋季講演大会
    • Related Report
      2019 Annual Research Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi