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Establishment of new material science for high-tempreture creep rupture

Research Project

Project/Area Number 20H00218
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 18:Mechanics of materials, production engineering, design engineering, and related fields
Research InstitutionKyushu University

Principal Investigator

Kubota Masanobu  九州大学, カーボンニュートラル・エネルギー国際研究所, 教授 (50284534)

Co-Investigator(Kenkyū-buntansha) 駒崎 慎一  鹿児島大学, 理工学域工学系, 教授 (70315646)
ステイコフ アレキサンダー  九州大学, カーボンニュートラル・エネルギー国際研究所, 准教授 (80613231)
薦田 亮介  九州工業大学, 大学院工学研究院, 准教授 (90801308)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥46,800,000 (Direct Cost: ¥36,000,000、Indirect Cost: ¥10,800,000)
Fiscal Year 2022: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2021: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2020: ¥32,240,000 (Direct Cost: ¥24,800,000、Indirect Cost: ¥7,440,000)
Keywords水素 / クリープ / スモールパンチ試験 / 中空試験片 / 荷重/応力変換式 / 密度汎関数理論計算 / 分子動力学 / スモールパンチクリープ試験 / 荷重/応力変換算式 / 密度班関数理論計算 / 高温水素機器 / オーステナイト系ステンレス鋼 / 純鉄 / 転位 / DFT / 空孔 / 高温
Outline of Research at the Start

水素の大量利用の実現は,CO2排出量の削減や再生可能エネルギー利用の増大につながり,また水素価格の低減にも必要と考えられている.核となる技術は,SOFC(高温型燃料電池)やSOEC(水蒸気電解セル)であるが,これらのエルネギー-物質変換デバイスは高温水素環境で動作するために,装置を構成する構造材料も非常に攻撃的な環境に置かれる.しかし,高温水素中の材料強度劣化現象とそれを引き起こすメカニズムには未解明の部分が多く,これらを理解する基礎科学を確立する必要がある.本研究の成果により,将来の水素社会の安全と安心に貢献したい.

Outline of Final Research Achievements

Elucidation of the mechanism that hydrogen reduces creep life and testing methods enables to facilitate creep test in hydrogen were studied. Regarding the mechanism, creep test of pure iron in hydrogen and computation about interaction of hydrogen with dislocation and vacancy were performed. Based on the results of the creep test, it was inferred that hydrogen accelerate creep deformation without changing fundamental creep deformation mechanism. Based on the results of calculations, it was clarified that hydrogen has no effect of the activation energy for vacancy migration, which is important result to argue the mechanism that we proposed.
Small punch creep test using a small disc sample was carried out in hydrogen. The material was SUS304. We clarified that the small punch creep test can be used for the assessment of the effect of hydrogen during creep deformation. In addition, applicability of hollow specimen to the creep test in hydrogen was experimentally investigated.

Academic Significance and Societal Importance of the Research Achievements

2050年までのカーボンニュートラル達成に向けて,高温水素利用技術に期待がかけられている.一方,高温水素中で材料強度特性が悪化する現象としてクリープ寿命の低下が報告されているが.その機構は未解明である.さらに,クリープは長時間の評価が必要であり,簡便に行える水素中クリープ試験の開発も必要である.本研究は,水素がクリープ変形を加速する機構の解明と,より多くのデータを効率的に取得できる方法の開発によって,高温水素利用技術の安全性の確保に貢献する.本研究では,純鉄の水素中クリープ変形に対して新しい機構を提案した.また,微小試験片を用いる方法と中空試験片を用いる方法の適用性を検討した.

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

    (18 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Presentation (17 results) (of which Int'l Joint Research: 9 results,  Invited: 7 results)

  • [Int'l Joint Research] Univ. of Illinois at Urbana Champaign(米国)

    • Related Report
      2021 Annual Research Report
  • [Presentation] 高温水素ガス雰囲気におけるSUS304鋼のスモールパンチクリープ特性2023

    • Author(s)
      村上幸太郎, 駒崎慎一, 久保田祐信
    • Organizer
      日本機械学会 九州支部第76期総会・講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 純鉄のクリープ特性に及ぼす水素の影響2023

    • Author(s)
      和田健太郎,山下透,高崎大裕,薦田亮介, 久保田祐信
    • Organizer
      九州大学エネルギーウィーク2023 ポスターセッション
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effect of Hydrogen on Creep Properties of Pure Iron2023

    • Author(s)
      Kentarou Wada, Toru yamashita, Daisuke Takazaki, Ryosuke Komoda, Toshihiro Tsuchiyama, Masanobu Kubota
    • Organizer
      I2CNER Annual Symposium 2023 Poster session
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高温水素雰囲気中スモールパンチクリープ試験技術の開発2022

    • Author(s)
      村上幸太郎, 駒崎慎一, 久保田祐信
    • Organizer
      日本機械学会 M&M2022 材料力学カンファレンス
    • Related Report
      2022 Annual Research Report
  • [Presentation] Creep in High-Temperature Hydrogen2022

    • Author(s)
      Masanobu Kubota
    • Organizer
      The 6th International Conference on Materials and Reliability (ICMR2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of Hydrogen on Creep Properties of SUY-1 and SUS310S2022

    • Author(s)
      Kentarou Wada, Toru Yamashita, Masanobu Kubota, Ryosuke Komoda
    • Organizer
      The 6th Asian Symposium on Materials and Processing (ASMP2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] クリープ強度特性に及ぼす水素の影響2022

    • Author(s)
      久保田祐信
    • Organizer
      第70期第4回 日本材料学会高温強度部門委員会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Effect of Hydrogen on Creep Properties of SUY-1 Industrial Pure Iron2022

    • Author(s)
      Kentarou Wada, Toru Yamashita, Daisuke Takazaki, Ryosuke Komoda, Masanobu Kubota
    • Organizer
      JSME International Conference on Materials and Processing 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高温水素機器の安全性を確実にするための水素中クリープに関する研究2022

    • Author(s)
      久保田祐信
    • Organizer
      日本塑性加工学会九州支部・第107回技術懇談会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] EFFECT OF HYDROGEN ON CREEP PROPERTIES OF SUY-1 AND SUS310S2022

    • Author(s)
      Kentarou Wada, Toru Yamashita, Masanobu Kubota, Ryosuke Komoda
    • Organizer
      THE 6TH ASIAN SYMPOSIUM ON MATERIALS AND PROCESSING 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高温水素中のクリープ強度データの蓄積と 水素による強度低下メカニズムの解明2022

    • Author(s)
      久保田祐信
    • Organizer
      日本材料学会高温強度部門委員会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Effect of Hydrogen on Creep Properties2022

    • Author(s)
      Masanobu Kubota, Daiskuke Takazaki, Ryosuke Komoda, Kentrao Wada, Toshihiro Tsuchiyama, Mohsen Dadfarnia, Brian P Somerday, Petros Sofronis
    • Organizer
      TMS2022, Anaheim, CA, USA
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of Hydrogen on Creep Properties of Austenitic Stainless Steels and Pure Iron2021

    • Author(s)
      Masanobu Kubota
    • Organizer
      Third International Forum on Hydrogen Codes, Standards and Safety in United Nations Development Program (UNDP) Hydrogen Industry Conference 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of hydrogen on creep properties of austenitic stainless steels and pure iron2021

    • Author(s)
      Wada Kentaro, Daisuke Takazaki, Masanobu Kubota, Toshihiro Tsuchiyama, Petros Sofronis, Brian P. Somerday, Mohsen Dadfarnia
    • Organizer
      日本材料学会第70期学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Effect of Hydrogen on Creep Properties of SUS304 Austenitic Stainless Steel2021

    • Author(s)
      Daisuke Takazaki, Kentaro Wada, Toshihiro Tsuchiyama, Ryosuke Komoda, Mohsen Dadfarnia, Brian P. Somerday, Petros Sofronis, Masanobu Kubota
    • Organizer
      2021 International Hydrogen Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Hydrogen on Creep Properties of SUS3042020

    • Author(s)
      Daisuke Takazaki, Toshihiro Tsuchiyama, Masanobu Kubota
    • Organizer
      HYDROGENIUS, I2CNER and HYDROMATE Joint Research Symposium
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of Hydrogen on Creep Properties of SUS304, SUS304L, SUS310S Stainless Steels and pure iron2020

    • Author(s)
      Daisuke Takazaki, Kentaro Wada, Ryosuke Komoda, Masanobu Kubota
    • Organizer
      日本材料学会九州支部 第7回学術講演会
    • Related Report
      2020 Annual Research Report

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

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