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Irradiation damage in refractory high entropy alloys focusing on the recovery of the lattice defect

Research Project

Project/Area Number 15K06484
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Structural/Functional materials
Research InstitutionOsaka University

Principal Investigator

Takeshi Nagase  大阪大学, 超高圧電子顕微鏡センター, 准教授 (50362661)

Co-Investigator(Kenkyū-buntansha) 西 竜治  大阪大学, 超高圧電子顕微鏡センター, 准教授 (40243183)
Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsハイエントロピー合金 / 照射損傷 / 原子力材料 / 超高圧電子顕微鏡法
Outline of Final Research Achievements

The phase stability of high entropy alloy (HEA) was investigated by High Voltage Electron Microscopy (HVEM) focusing on the occurence of solid state amorphization(SSA). The occurence of SSA was not detected under fast electron irradiation in equiatomic TiNbTaZr with BCC structure, equiatomic TiNbTaZrV with BCC structure and CoCrCuFeNi with FCC structure, and non-equiatomic Al0.3CoCrFeNi with BCC structure. In contrast, non-equiatomic Al0.5TiZrPdCuNi with BCC structure shows the SSA regardless of the initial microstructure (i.e., "coarse crystalline structure" or "nano-crystalline structure with grain boundaries as a sink for point defects"). This result suggests that the Al0.5TiZrPdCuNi HEA from other common alloys and the other HEAs. The SSA behavior in Al0.5TiZrPdCuNi HEA investigated by HVEM indicated that SSA behavior in Al0.5TiZrPdCuNi HEA was similar to that in intermetallic compounds reported to date.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (9 results)

All 2018 2017 2016 2015 Other

All Int'l Joint Research (2 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Int'l Joint Research] ORNL(U.S.A.)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] オークリッジ国立研究所(米国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Solid state amorphization of metastable Al 0.5 TiZrPdCuNi high entropy alloy investigated by high voltage electron microscopy2018

    • Author(s)
      Nagase Takeshi、Takeuchi Akira、Amiya Kenji、Egami Takeshi
    • Journal Title

      Materials Chemistry and Physics

      Volume: 210 Pages: 291-300

    • DOI

      10.1016/j.matchemphys.2017.07.071

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Irradiation induced structural change in High Entropy Alloys2018

    • Author(s)
      T. Nagase, A. Takeuchi, K. Amiya, T. Egami
    • Organizer
      Japan Institute of Metals and Materials
    • Related Report
      2017 Annual Research Report
  • [Presentation] Solid state amorphization behavior in Al0.5TiZrPdCuNi High Entropy alloy2017

    • Author(s)
      T. Nagase
    • Organizer
      The 3rd East-Asia Microcopy Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Irradiation induced solid state amorphization in High Entropy Alloys (HEAs) investigated by High Voltage Electron Microscopy (HVEM)2016

    • Author(s)
      T. Nagase, A. Takeuchi, K. Amiya, T. Egami
    • Organizer
      The first International Conference on High-Entropy Materials
    • Place of Presentation
      National Tsing Hua University, Taiwan
    • Year and Date
      2016-11-06
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Al0.5TiZrPdCuNiハイエントロピー合金の固相アモルファス化2016

    • Author(s)
      永瀬丈嗣, 竹内章, 網谷健児
    • Organizer
      日本顕微鏡学会
    • Place of Presentation
      仙台国際センター(宮城県・仙台市)
    • Year and Date
      2016-06-14
    • Related Report
      2016 Research-status Report
  • [Presentation] In situ TEM observation of fast electron irradiation induced structural change in Al0.5TiZrPdCuNi High Entropy Alloy (HEA) and High Entropy Glass (HEG)2016

    • Author(s)
      T. Nagase, A. Takeuchi, K. Amiya
    • Organizer
      he 4th workshop on TEM with In-Situ irradiation (WOTWISI-4
    • Place of Presentation
      Orsay & Gif sur Yvette, France
    • Year and Date
      2016-03-16
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Al0.5TiZrPdCuNiハイエントロピーガラス・ハイエントロピー合金の照射効果2015

    • Author(s)
      永瀬丈嗣、竹内章、網谷健児
    • Organizer
      日本金属学会2015年秋期講演(第157回)大会
    • Place of Presentation
      福岡県・福岡市
    • Year and Date
      2015-05-26
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2019-03-29  

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