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Microstructural development due to slips and twining in Zinc under ECAP

Research Project

Project/Area Number 18K04684
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 26010:Metallic material properties-related
Research InstitutionKumamoto University

Principal Investigator

Kitahara Hiromoto  熊本大学, 先進マグネシウム国際研究センター, 准教授 (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)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords巨大ひずみ加工 / 結晶粒微細化 / 集合組織 / 粒界すべり / 二次錐面すべり / 微細化 / 再結晶 / 結晶塑性
Outline of Final Research Achievements

Zinc shows ideal corrosion behavior in human bodies and is expected to be used as biomaterials; however, its strength is not enough. Therefore, we employed ECAP process, a severe plastic deformation, to improve the strength of zinc due to grain refinement.ECAP was carried out at 0 degrees celsius since zinc has a low melting point.Tensile yield stress of zinc was more than doubled after even one pass of ECAP.Four passes of ECAP were applied to zinc; however, the stress was about identical to that after the first pass.On the other hand,ECAPed zinc showed high elongation due to grain boundary sliding in tensile tests at room temperature. We found that basal slips, <c+a> second order pyramidal slips and twinning progress grain refinement and form texture in zinc under ECAP.

Academic Significance and Societal Importance of the Research Achievements

亜鉛は主に鉄鋼材料のメッキとして使用されているため、亜鉛自身の変形挙動に関する研究例は少ない。また、亜鉛は六方晶構造を有していることから、その変形挙動は非常に複雑である。本研究の成果は、亜鉛の変形挙動を明らかにするだけではなく、未解明な部分が多い六方晶金属の変形挙動の解明の一端も担うこととなる。そのため、本研究成果の学術的意義は高いと考えている。一方、亜鉛は生体吸収性に優れており、生体用材料としての実用化が期待されている。そのため、今後の亜鉛製の生体材料の実用化(製造)に向けて、本研究で得られた変形挙動に関する研究成果は有用であり、社会的意義も高いと考えている。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (9 results)

All 2021 2020 2019 2018

All Presentation (9 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] ARBを施した亜鉛板の力学特性の調査2021

    • Author(s)
      大平祐輝,青山拓実,津志田雅之,北原弘基,安藤新二
    • Organizer
      日本材料学会第70期学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ARBを施した純ZnおよびZDC2の組織と力学特性の調査2021

    • Author(s)
      大平祐輝,青山拓実,津志田雅之,北原弘基,安藤新二
    • Organizer
      日本金属学会九州支部,日本鉄鋼協会九州支部,軽金属学会九州支部令和3年度合同学術講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 273KでECAPを施した純亜鉛の組織と 機械的特性の調査2021

    • Author(s)
      宮本芳宏,津志田雅之,北原弘基,安藤新二
    • Organizer
      日本金属学会2021年(第169回)秋期講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 273KでECAPを施した純 Zn の機械的特性と変形機構の調査2021

    • Author(s)
      宮本芳宏,津志田雅之,北原弘基,安藤新二
    • Organizer
      材料学会九州支部第8回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Microstructure and Mechanical Properties of Pure Zinc Deformed by ECAP at 273K2021

    • Author(s)
      Yoshihiro Miyamoto,Hiromoto Kitahara,Shinji Ando
    • Organizer
      The 16th International Student Conference on Advanced Science and Technology, ICAST2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] ECAP 加工を施した純 Zn の機械的特性の調査2020

    • Author(s)
      宮本芳宏, 織田悠樹,津志田雅之, 北原弘基, 安藤新二
    • Organizer
      材料学会九州支部第7回学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Zn Single Crystals Deformed by a Single Pass of ECAP2019

    • Author(s)
      H.Kitahara, Y.Mastuo, Y.Oda, M.Tsushida, S.Ando
    • Organizer
      The 10th Pacific Rim International Conference on Advanced Materials and Processing (PRICM10)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 1-PassのECAP加工による純Znの変形挙動の調査2018

    • Author(s)
      織田悠暉,津志田雅之,北原弘基,安藤新二
    • Organizer
      合同学術講演会(日本金属学会・日本鉄鋼協会・軽金属学会 九州支部)
    • Related Report
      2018 Research-status Report
  • [Presentation] Deformation behavior of Pure Magnesium and Zinc single crystals during a single pass of ECAP2018

    • Author(s)
      Yuki Oda, Masayuki Tsushida, Hiromoto Kitahara and Shinji Ando
    • Organizer
      LPSO2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2023-01-30  

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