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2013 Fiscal Year Final Research Report

Microstructure refinement of steels by intragranular nucleation in displacive transformation

Research Project

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Project/Area Number 23686098
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Structural/Functional materials
Research InstitutionTohoku University

Principal Investigator

MIYAMOTO Goro  東北大学, 金属材料研究所, 准教授 (60451621)

Project Period (FY) 2011-04-01 – 2014-03-31
Keywordsせん断型変態 / 組織微細化 / マルテンサイト / ベイナイト
Research Abstract

In order to refine microstructure of displacive transformation, intragranular nucleation, which has been used in the diffusional transformation, has been applied. It was found that, unlike to diffusional transformation, effects of inclusion or precipitates within matrix grains are small while deformation prior to transformation accelerates intragranulear nucleation of martensite or baintie, leading to refinement of microstructure.
Furthermore, novel characterization method has been developed on a basis of precise measurement of orientation relationship between product and matrix phases and reconstruction method of austenite matrix.

  • Research Products

    (13 results)

All 2014 2013 2012 2011

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (8 results)

  • [Journal Article] Comparison of Variant Selection between Lenticular and Lath Martensite Transformed from Deformed Austenite2013

    • Author(s)
      T.Chiba, G.Miyamoto, T.Furuhara
    • Journal Title

      ISIJ Int

      Volume: 53 Pages: 915-919

    • DOI

      10.2355/isijinternational.53.915

    • Peer Reviewed
  • [Journal Article] Variant selection of lath martensite and bainite transformation in low carbon steel by ausforming2013

    • Author(s)
      G. Miyamoto, N. Iwata, N. Takayama, T. Furuhara
    • Journal Title

      J. Alloy and Compounds

      Volume: 577 Pages: S528-S532

    • DOI

      10.1016/j.jallcom.2011.12.111

    • Peer Reviewed
  • [Journal Article] Variant selection in ausformed lenticular martensite2012

    • Author(s)
      Chiba T, G. Miyamoto, T. Furuhara
    • Journal Title

      Scripta Mater

      Volume: 67 Pages: 324–327

    • DOI

      10.1016/j.scriptamat.2012.05.007

    • Peer Reviewed
  • [Journal Article] Effects of transformation temperature on variant pairing of bainitic ferrite in low carbon steel2012

    • Author(s)
      N. Takayama, G. Miyamoto and T. Furuhara
    • Journal Title

      Acta Mater

      Volume: 60 Pages: 2387–2396

    • DOI

      10.1016/j.actamat.2011.12.018

    • Peer Reviewed
  • [Journal Article] Quantitative analysis of variant selection in ausformed lath martensite2012

    • Author(s)
      G. Miyamoto, N. Iwata, N. Takayama, T. Furuhara
    • Journal Title

      Acta Mater

      Volume: 60 Pages: 1139–1148

    • DOI

      10.1016/j.actamat.2011.11.018

    • Peer Reviewed
  • [Presentation] EBSD法を用いた鉄系マルテンサイトの結晶学解析2014

    • Author(s)
      宮本吾郎,古原忠
    • Organizer
      日本金属学会2014年春期(第154回)講演大会
    • Place of Presentation
      東工大
    • Year and Date
      2014-03-22
  • [Presentation] オースフォームドレンズマルテンサイトのバリアント選択に及ぼす母相粒界の影響2014

    • Author(s)
      知場三周,宮本吾郎,古原忠
    • Organizer
      日本金属学会2014年春期(第154回)講演大会
    • Place of Presentation
      東工大
    • Year and Date
      2014-03-22
  • [Presentation] Variant selection of ausformed martensite in Fe-Ni-C alloys2013

    • Author(s)
      T. Chiba, G. Miyamoto,T. Furuhara
    • Organizer
      日本鉄鋼協会第165回春季講演大会
    • Place of Presentation
      東京電機大.
    • Year and Date
      2013-03-27
  • [Presentation] オースフォームドレンズマルテンサイトのバリアント選択2012

    • Author(s)
      知場三周、宮本吾郎、古原忠
    • Organizer
      日本鉄鋼協会第164回秋季講演大会
    • Place of Presentation
      愛媛
    • Year and Date
      2012-09-15
  • [Presentation] EBSD法を用いたFe-Cマルテンサイトの方位関係とバリアント隣接傾向の解析2012

    • Author(s)
      G.Miyamoto, A.Stormvinter, T. Furuhara, A.Borgenstam
    • Organizer
      日本鉄鋼協会第163回春季講演大会
    • Place of Presentation
      横国
    • Year and Date
      2012-03-30
  • [Presentation] 低炭素鋼のベイナイトおよびラスマルテンサイト組織におけるバリアント選択2012

    • Author(s)
      高山直樹,宮本吾郎,古原忠
    • Organizer
      日本鉄鋼協会第163回春季講演大会
    • Place of Presentation
      横国
    • Year and Date
      2012-03-30
  • [Presentation] オースフォームドラスマルテンサイトにおけるバリアント選択の定量解析2011

    • Author(s)
      G.Miyamoto, N.Iwata, N.Takayama, T.Furuhara
    • Organizer
      日本鉄鋼協会第161回秋季講演大会
    • Place of Presentation
      大阪大学
    • Year and Date
      2011-09-22
  • [Presentation] Variant selection of bainite and lath martensite in low carbon steel2011

    • Author(s)
      N. Takayama, G. Miyamoto and T. Furuhara
    • Organizer
      日本鉄鋼協会第161回秋季講演大会
    • Place of Presentation
      大阪大学
    • Year and Date
      2011-09-21

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Published: 2015-07-16  

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