• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Local deformation behavior of hcp single crystals using a spherical indenter

Research Project

Project/Area Number 15K06425
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Physical properties of metals/Metal-base materials
Research InstitutionKumamoto University

Principal Investigator

Kitahara Hiromoto  熊本大学, パルスパワー科学研究所, 助教 (50397650)

Co-Investigator(Kenkyū-buntansha) 安藤 新二  熊本大学, 先進マグネシウム国際研究センター, 教授 (40222781)
Research Collaborator WATANABE momoka  
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords底面すべり / 錐面すべり / 双晶 / Pop-in / 分子動力学法 / すべり / pop-in / 二次錐面すべり / 双晶変形 / 転位
Outline of Final Research Achievements

Pure magnesium single crystals, magnesium alloy single crystals (Mg-Al, Mg-Al and Mg-Y), pure titanium single crystals and pure zinc were applied to indentation tests using a spherical indenter, and the deformation behavior was investigated. Indentation sizes on (0001) depend on critical resolved shear stress (CRSS) for basal slips. When indented on (10-10) and (1-210), indentation sizes were determined by CRSSs for basal slips and {10-12} twins. Pop-in phenomena were observed on load-penetration curves when indented on (0001). Molecular dynamics simulations showed that the pop-in phenomena result from the generation of dislocation loops and cross slips from basal slips to pyramidal slips.

Academic Significance and Societal Importance of the Research Achievements

本研究で対象としたマグネシウムやチタンは軽量金属であり、輸送機器の構造部材をはじめ、更なる応用展開が進められている。一方、亜鉛は生体吸収性インプラント用の素材として近年注目されており、その力学特性に関する研究が活発に進められている。しかしながら、本研究のように系統的に研究を実施した例はなく、学術的意義は非常に高いと考えている。一方で、固体力学分野では、単結晶の挙動に基づいた多結晶挙動を予測する結晶塑性解析シミュレーションが実用化されつつある。得られた成果は、計算機シミュレーションの実用化に向けた重要な基礎データとなることから社会的意義は高いと考えている。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (8 results)

All 2018 2017

All Presentation (8 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Presentation] Ball indentation Behavior of Mg Alloy Single Crystals2018

    • Author(s)
      Hiromoto Kitahara, Momoka Watanabe, Yohei Takamatsu, Masayuki Tsushida, Shinji Ando
    • Organizer
      THERMEC’2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Micro-indentation Behavior in Pure Mg, Zn and Ti Single Crystals2018

    • Author(s)
      Momoka Watanabe, Hiroki Tanaka, Masayuki Tsushida, Hiromoto Kitahara, Shinji Ando
    • Organizer
      THERMEC’2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ball Indentation Behaviour of Mg and Its Alloy Single Crystals2018

    • Author(s)
      Hiromoto Kitahara, Momoka Watanabe, Yohei Takamatsu, Masayuki Tsushida, Shinji Ando
    • Organizer
      Mg2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Molecular Dynamics Simulation of Dislocation Behavior around Spherical Indentation in HCP Crystal2018

    • Author(s)
      Shinji Ando, Momoka Watanabe and Hiromoto Kitahara
    • Organizer
      Atomistic Processes of Crystal Plasticity (APCP)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mg合金単結晶の圧子圧入変形挙動に与える合金元素の影響2017

    • Author(s)
      北原弘基, 高松洋平, 津志田雅之, 安藤新二
    • Organizer
      軽金属学会 第132回春期大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 圧子圧入試験による純 Mg,TiおよびZn単結晶の変形挙動の比較2017

    • Author(s)
      北原 弘基, 渡邉 桃加, 田中 浩貴, 津志田 雅之,安藤 新二
    • Organizer
      日本金属学会2017年秋期講演(第161回)大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Indentation Behavior of Mg Alloy Single Crystals2017

    • Author(s)
      Hiromoto Kitahara, Momoka Watanabe, Yohei Takamatsu, Masayuki Tsushida, Shinji Ando
    • Organizer
      The 6th International Conference on Magnesium (ICM6)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] HCP金属単結晶における球圧子変形挙動2017

    • Author(s)
      北原弘基
    • Organizer
      第68回高性能Mg合金創成加工研究会講演会
    • Related Report
      2017 Research-status Report
    • Invited

URL: 

Published: 2015-04-16   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi