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Mechanism of plasticity under ultrafast deformation and its application

Research Project

Project/Area Number 19K22061
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionOsaka University

Principal Investigator

Sano Tomokazu  大阪大学, 工学研究科, 教授 (30314371)

Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsフェムト秒レーザ / 衝撃圧縮 / フェムト秒レーザ駆動衝撃波 / 超高速変形 / 転位 / 衝撃加工
Outline of Research at the Start

本研究では、超高速変形下で発現していると考えられる一般的な塑性変形の原理とは異なる機構を解明し、それを新しい塑性加工法として応用することを目的とする。本研究では、材料が超高速変形する際の転位の挙動をX線で直接計測することによって、超音速転位あるいは転位を介在しない塑性すべりの存在を調べ、衝撃波頭背後での転位核生成モデルを新たに構築することによって、超高速変形下の塑性発現機構を明らかにする。さらに、この塑性変形がマクロな機械特性に及ぼす影響を調べ、新しい塑性加工法としての展開を図る。

Outline of Final Research Achievements

In general, mechanism of conventional plastic deformation is the shear deformation caused by dislocation movement involved in the material to a slip direction on a slip plane. The purpose of this study is to investigate the mechanism of ultrafast deformation which is expected to be different from the conventional deformation and apply the predicted mechanism as a new plastic deformation process. We found that the ultrafast deformation is able to deform the materials plastically having BCC, FCC, and HCP structures owing to the new mechanism.

Academic Significance and Societal Importance of the Research Achievements

本研究によって、これまでに無かった新しい塑性変形機構を提唱出来るだけでなく、この機構を利用することによって、これまで従来法では強化することが難しかった材料を強化することが可能になる。例えば、CO2削減のため自動車の軽量化が進められており、このことを実現するために軽量で高強度である高張力鋼板が用いられている。ところが、この高張力鋼板を後処理でさらに強度を上げることは極めて難しい。その理由は、既に臨界密度に近い転位を内在しているためである。本研究によって、転位を効率的に追加することが出来るようになり、マクロ的にはさらなる高強度化が可能になると見込まれる。

Report

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

    (27 results)

All 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (18 results) (of which Int'l Joint Research: 12 results,  Invited: 8 results) Book (1 results)

  • [Int'l Joint Research] University of Nevada, Reno/Iowa State University(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] HiLASE(チェコ)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Pulse duration dependence of dry laser peening effects in the femtosecond-to-picosecond regime2021

    • Author(s)
      Nishibata Itsuki、Yoshida Masayuki、Ito Yusuke、Sugita Naohiko、Hirose Akio、Sano Tomokazu
    • Journal Title

      Applied Physics Express

      Volume: 14 Issue: 6 Pages: 062001-062001

    • DOI

      10.35848/1882-0786/abfca2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] フェムト秒レーザによるドライレーザピーニングとそのメカニズム2021

    • Author(s)
      佐野智一
    • Journal Title

      第95回レーザ加工学会講演論文集

      Volume: 95 Pages: 69-75

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Microstructure and mechanical properties of additively manufactured CoCrW alloy using laser metal deposition2020

    • Author(s)
      Miyake Masashi、Matsuda Tomoki、Sano Tomokazu、Hirose Akio、Shiomi Yasutomo、Sasaki Mitsuo
    • Journal Title

      Welding in the World

      Volume: 64 Issue: 8 Pages: 1397-1407

    • DOI

      10.1007/s40194-020-00926-y

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Mechanism for Inducing Compressive Residual Stresses on a Surface by Laser Peening without Coating2020

    • Author(s)
      Sano Yuji、Akita Koichi、Sano Tomokazu
    • Journal Title

      Metals

      Volume: 10 Issue: 6 Pages: 816-816

    • DOI

      10.3390/met10060816

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Improving Fatigue Performance of Laser-Welded 2024-T3 Aluminum Alloy Using Dry Laser Peening2019

    • Author(s)
      Tomokazu Sano, Takayuki Eimura, Akio Hirose, Yosuke Kawahito, Seiji Katayama, Kazuto Arakawa, Kiyotaka Masaki, Ayumi Shiro, Takahisa Shobu, Yuji Sano
    • Journal Title

      Metals

      Volume: 9 Issue: 11 Pages: 1192-1194

    • DOI

      10.3390/met9111192

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Grain refining in weld metal using short-pulsed laser ablation during CW laser welding of 2024-T3 aluminum alloy2019

    • Author(s)
      Masaki Kasuga, Tomokazu Sano, Akio Hirose
    • Journal Title

      International Journal of Extreme Manufacturing

      Volume: 1 Issue: 4 Pages: 045003-045003

    • DOI

      10.1088/2631-7990/ab563a

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] フェムト秒レーザによるドライレーザピーニングとそのメカニズム2021

    • Author(s)
      佐野智一
    • Organizer
      第95回レーザ加工学会講演論文集
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 静的圧縮によるアルミニウムの微細結晶粒組織の形成2021

    • Author(s)
      田中友登, 佐野智一, 富岡尚敬, 松田朋己, 荒河一渡, 奥地拓生
    • Organizer
      第62回高圧討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Improving Fatigue Performance of Laser-Welded 2024-T3 Aluminum Alloy Using Dry Laser Peening2021

    • Author(s)
      Tomokazu Sano
    • Organizer
      Photonics Asia 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Improving fatigue properties of friction stir-welded/laser-welded 2024 aluminum alloys using dry laser peening2021

    • Author(s)
      Tomokazu Sano, Takayuki Eimura, Akio Hirose
    • Organizer
      International Conference on Processing & Manufacturing of Advanced Materials (THERMEC'2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ドライレーザーピーニング効果に及ぼすフェムト-ピコ秒領域でのパルス幅依存性2021

    • Author(s)
      西端樹, 吉田雅幸, 伊藤佑介, 杉田直彦, 廣瀬明夫, 佐野智一
    • Organizer
      2021年第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] パルス幅制御による2024アルミニウム合金のドライレーザーピーニング効果向上2021

    • Author(s)
      吉田雅幸, 西端樹, 松田朋己, 伊藤佑介, 杉田直彦, 荒河一渡, 廣瀬明夫, 佐野智一
    • Organizer
      2021年第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Dry Laser Peening: Improving Fatigue Properties of Friction Stir-Welded/Laser-Welded 2024 Aluminum Alloys2020

    • Author(s)
      Tomokazu Sano, Takayuki Eimura, Akio Hirose
    • Organizer
      21st International Symposium on Laser Precision Microfabrication (LPM2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] フェムト秒レーザー加工の新しい展開 ~フェムト秒レーザ駆動衝撃波を利用した表面改質~2020

    • Author(s)
      佐野智一
    • Organizer
      第98回産研テクノサロン
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Dry Laser Peening for Improving Fatigue Properties of Laser Welded 2024-T3 Aluminum Alloy using Femtosecond Laser Pulses2019

    • Author(s)
      佐野智一、荒河一渡、菖蒲敬久、他
    • Organizer
      The 7th Laser Ignition and Giant-microphotonics Conference (LIC2019), 横浜
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Dry Laser Peening for Improving Fatigue Properties of Laser Welded 2024-T3 Aluminum Alloy using Femtosecond Laser Pulses2019

    • Author(s)
      佐野智一、荒河一渡、菖蒲敬久、他
    • Organizer
      The 8th International Congress on Laser Advanced Materials Processing (LAMP2019), 広島
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Femtosecond laser-driven shock compression of solids and its engineering applications2019

    • Author(s)
      佐野智一
    • Organizer
      International Symposium Fundamentals of Laser Assisted Micro- and Nanotechnologies (FLAMN2019), St. Petersburg, Russia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Dry laser peening for improving fatigue properties of weld joints of 2024 aluminum alloys2019

    • Author(s)
      佐野智一
    • Organizer
      The 72nd IIW Annual Assembly and International Conference, Bratislava, Slovakia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] レーザーピーニングのインフラへの適用検討4(水を使用しない新しいレーザーピーニング技術による構造材料の疲労寿命延長)2019

    • Author(s)
      佐野智一
    • Organizer
      日本機械学会 2019年度年次大会、秋田大学
    • Related Report
      2019 Research-status Report
  • [Presentation] Dry laser peening for improving fatigure properties of aluminum alloys2019

    • Author(s)
      佐野智一
    • Organizer
      2nd European Workshop on Laser Peening and Related Phenomena (LSP Days 2019), Hamburg, Germany
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Grain refining using pulsed laser ablation during CW laser welding of 2024-T3 aluminum alloy2019

    • Author(s)
      春日仁希、佐野智一
    • Organizer
      2nd European Workshop on Laser Peening and Related Phenomena (LSP Days 2019), Hamburg, Germany
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Femtosecond laser peening of pure iron2019

    • Author(s)
      西端樹、佐野智一
    • Organizer
      2nd European Workshop on Laser Peening and Related Phenomena (LSP Days 2019), Hamburg, Germany
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dry Laser Peening for Improving Fatigue Properties of Laser Welded 2024-T3 Aluminum Alloy using Femtosecond Laser Pulses2019

    • Author(s)
      佐野智一、荒河一渡、菖蒲敬久、他
    • Organizer
      Photonics Asia 2019, 杭州、中国
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Improving Fatigue Properties of Friction Stir-Welded/Laser-Welded 2024 Aluminum Alloys Using Dry Laser Peening2019

    • Author(s)
      佐野智一、荒河一渡、菖蒲敬久、他
    • Organizer
      14th International Aluminium Conference (INALCO)、東京
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] Laser Micro-Nano-Manufacturing and 3D Microprinting2020

    • Author(s)
      Tomokazu Sano
    • Total Pages
      22
    • Publisher
      Springer
    • Related Report
      2020 Research-status Report

URL: 

Published: 2019-07-04   Modified: 2023-01-30  

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