HIROSAWA Shoichi

Affiliation

Faculty of Engineering, Division of Systems Research

Job Title

Professor

Date of Birth

1969

Research Fields, Keywords

Structural Materials Design, Microstructural Control and Analysis, Computational Materials Science

Mail Address

E-mail address



写真a

The Best Research Achievement in the last 5 years 【 display / non-display

Graduating School 【 display / non-display

  •  
    -
    1993

    Tokyo Institute of Technology   Faculty of Engineering   Department of Metallurgical Engineering   Graduated

Graduate School 【 display / non-display

  •  
    -
    1998

    Tokyo Institute of Technology  Graduate School, Division of Science and Engineering  Department of Metallurgical Engineering  Doctor Course  Completed

  •  
    -
    1995

    Tokyo Institute of Technology  Graduate School, Division of Science and Engineering  Department of Metallurgical Engineering  Master Course  Completed

Degree 【 display / non-display

  • Doctor of Engineering -  Tokyo Institute of Technology

Campus Career 【 display / non-display

  • 2017.04
    -
    Now

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Systems Research   Professor  

  • 2014.04
    -
    2017.03

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Materials Science and Chemical Engineering   Professor  

  • 2007.04
    -
    2014.03

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Materials Science and Chemical Engineering   Associate Professor  

  • 2018.04
    -
    Now

    Concurrently   Yokohama National UniversityGraduate school of Engineering Science   Department of Mechanical Engineering, Materials Science and Ocean Engineering   Professor  

  • 2017.04
    -
    Now

    Concurrently   Yokohama National UniversityCollege of Engineering Science   Department of Mechanical Engineering, Materials Science and Ocean Engineering   Professor  

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External Career 【 display / non-display

  • 2002.01
    -
    2007.03

    Assistant Professor of Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology   Research Assistant  

  • 1999.04
    -
    2001.12

    University of Oxford   Research Associate of Department of Materials  

  • 1998.04
    -
    1999.02

    Technology and Medicine   Department of Materials, Imperial College of Science   Visiting Researcher  

  • 1997.04
    -
    1999.03

    Japan Society for the Promotion of Science   Research Fellowship for Young Scientists of the Japan Society for the Promotion of Science  

Academic Society Affiliations 【 display / non-display

  • 2007
     
     
     

    Japan Society for Heat Treatment

  • 1997
     
     
     

    Japan Institute of Metals

  • 1993
     
     
     

    Japan Institute of Light Metals

Field of expertise (Grants-in-aid for Scientific Research classification) 【 display / non-display

  • Structural/Functional materials

  • Physical properties of metals/Metal-base materials

  • Material processing/Microstructural control engineering

 

Research Career 【 display / non-display

  • Development of age-hardening technology for ultrafine-grained aluminum alloys processed by severe plastic deformation

    Project Year:  -   

  • Development of new fabrication process of Al-Mg-Si alloy sheets for body-panels of automobiles

    Project Year:  -   

  • Development of novel heat-resistant aluminum alloys

    Project Year:  -   

Books 【 display / non-display

  • Advanced Materials in Aerospace Engineering "Three strategies to achieve concurrent strengthening by ultrafine-grained and precipitation hardenings for severly deformed age-hardenable aluminum alloys"

    山根健ほか計34名 (Part: Contributor )

    Trans Tech Publications Inc.  2016.01

Thesis for a degree 【 display / non-display

  • Microstructure Evolution and Role of Microalloying Elements in Phase Decomposition of Al-Li-Cu Base Alloys

    廣澤 渉一 

    Doctral thesis of Tokyo Institute of Technology    1998.03

    Doctoral Thesis   Single Work

     View Summary

    東京工業大学理工学研究科金属工学専攻 種々のマイクロアロイング元素を含むAl-Li-Cu合金の析出組織形成を、TEM観察や電気比抵抗測定、熱分析およびモンテカルロシミュレーションを用いて明らかにし、原子間の相互作用エネルギーの大小で相分解挙動を分類・予測することで、より効率的な合金設計を可能とした

Papers 【 display / non-display

  • First-principles calculation of elastic properties of Cu-Zn intermetallic compounds for improving the stiffness of aluminum alloys

    H.Iwaoka, S.Hirosawa

    Computational Materials Science ( Elsevier )  174   109479   2019.12  [Refereed]

    Joint Work

     View Summary

    In this study, we computed the elastic properties of Cu-Zn binary intermetallic compounds, CuZn, Cu5Zn8 and CuZn4, by first-principles calculation and discussed the capability of the improvement in stiffness of aluminum alloys by aging treatment. The disordered CuZn4 with random atom distribution was emulated for the first time by virtual crystal approximation (VCA) model and special quasirandom structure (SQS) model with symmetry-based projection (SBP) technique. From the present calculation results, it was found that Young’s modulus of polycrystalline aggregate of CuZn4 is almost comparable to the highest counterpart of Cu5Zn8 with lower elastic anisotropy, but the expected volume fraction of CuZn4 is much higher than that of Cu5Zn8 after aging treatment. According to the rule of mixtures for the aluminum matrix and differently oriented intermetallic compounds, therefore, CuZn4 was rationally recommended as the most suitable intermetallic compound for improving the stiffness of Al-Cu-Zn alloys.

    DOI

  • Microstructures and the Mechanical Properties of the Al–Li–Cu Alloy Strengthened by the Combined Use of Accumulative Roll Bonding and Aging

    Yongpeng Tang, Shoichi Hirosawa, Seiji Saikawa, Kenji Matsuda, Seungwon Lee, Zenji Horita, Dai … Show more authors

    Advanced Science ( Wiley Online Library )    2019.06

    Joint Work

    DOI

  • Development of High-Strength Bolt Material of Al–Mg–Si Alloy by ECAP and Various Aging Treatments

    Tomoyasu Obata, Yongpeng Tang, Hideaki Iwaoka, Shoichi Hirosawa, Keiki Mouri, Masahiko Shimoda

    MATERIALS TRANSACTIONS ( J-STAGE )  Vol.60 ( 8 )   1680 - 1687   2019.06

    Joint Work

    DOI

  • Effect of pre-aging on artificial age-hardening behavior of Al-Mg-Si alloys with Mg + Si = 1.5 mass%

    S. Tsukamoto, S. Nakamura, K. Fujiwara, S. Hirosawa, Y. Koshino, and Y. Aruga

    Proc. of the 16th International Conference on Aluminum Alloys (ICAA16)     404577 1 - 6   2018.06  [Refereed]

    Joint Work

  • Development of high-strength bolt material of Al-Mg-Si alloy by ECAP and various aging treatments

    Tomoyasu OBATA,Yongpeng TANG,Hideaki IWAOKA,Shoichi HIROSAWA,Keiki MOURI,Masahiko SHIMODA

    Journal of Japan Institute of Light Metals ( Japan Institute of Light Metals )  68 ( 2 )   65 - 72   2018.02  [Refereed]

    Joint Work

    CiNii

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Review Papers 【 display / non-display

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Academic Awards Received 【 display / non-display

  • Light Metals Paper Prize

    2010.11.13    

  • Light Metals Paper Prize

    2007.11    

  • Young Scientist Award of Japan Institute of Light Metals

    2003.11    

  • Japan Institute of Metals Young Scientist Medal

    2002.09    

  • Light Metals Paper Prize

    1996.11    

Grant-in-Aid for Scientific Research 【 display / non-display

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2010.04  -  2013.03 

Other external funds procured 【 display / non-display

  • Development of novel wrought aluminum alloys concurrently strengthened by ultrafine-grained and precipitation hardenings and establishment of guidelines for the innovative alloy designing

    Offer organization: Japan Science and Technology Agency  Collaborative Research Based on Industrial Demand "Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials"

    Project Year: 2011.10  -  2017.03  Investigator(s): Shoichi HIROSAWA

Presentations 【 display / non-display

  • Concurrent strengthening of ultrafine-grained age-hardenable Al-Mg alloy by means of high-pressure torsion and spinodal decomposition

     [Invited]

    2017.07.11  

  • Three strategies to achieve concurrent strengthening by ultrafine-grained and precipitation hardenings for severely deformed age-hardenable aluminum alloys

    S.Hirosawa, Y.Tang, Z.Horita, S.Lee, K.Matsuda, D. Terada  [Invited]

    9th Pacific Rim Inte. Conf. on Advanced Materials and Processing (PRICM9) (Three strategies to achieve concurrent strengthening by ultrafine-grained and precipitation hardenings for severely deformed age-hardenable aluminum alloys)  2016.08.04   9th Pacific Rim Inte. Conf. on Advanced Materials and Processing (PRICM9)

  • Comparative and complementary characterization of precipitate microstructures in Al-Mg-Si(-Li) alloys by TEM, EDS and APT

    S.Hirosawa, Y.Koshino, M.Kozuka, Y.Aruga

    15th Inter. Conf. on Aluminum Alloys (ICAA15) (Comparative and complementary characterization of precipitate microstructures in Al-Mg-Si(-Li) alloys by TEM, EDS and APT)  2016.06.13   15th Inter. Conf. on Aluminum Alloys (ICAA15)

  • Comparative and complementary characterization of precipitate microstructures in Al-Mg-Si(-Li) alloys

    2016.03.01  

  • Three strategies to achieve concurrent strengthening by ultrafine-grained and precipitation hardenings for severely deformed age-hardenable aluminum alloys

    S. Hirosawa, Y. Tang, Z. Horita, S. Lee, K. Matsuda, D. Terada

    International Workshop of Giant Straining Process for Advanced Materials 2015 (GSAM2015)(Three strategies to achieve concurrent strengthening by ultrafine-grained and precipitation hardenings for severely deformed age-hardenable aluminum alloys)  (Fukuoka)  2015.09.05  

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Past of Collaboration and Commissioned Research 【 display / non-display

  • Japan Science and Technology Agency (JST) under Collaborative Research Based on Industrial Demand "Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials"

    Cooperative Research within Japan  

    Project Year: 2011.10  -  2017.03 

  • Development of age-hardening technology for ultrafine-grained aluminum alloys processed by giant straining

    Cooperative Research within Japan  

    Project Year: 2009.04  -  2011.03 

  • Studies on creep behavior of aluminum alloys

    Cooperative Research within Japan  

    Project Year: 2007.04  -  2010.03