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Simultaneous improvement of strength and room-temperature formability of rolled Mg alloy by dynamic recrystallization based microstructural control

Research Project

Project/Area Number 22K18900
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 InstitutionNagaoka University of Technology

Principal Investigator

Nakata Taiki  長岡技術科学大学, 産学融合トップランナー養成センター, 特任講師 (80800573)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywordsマグネシウム合金 / 圧延加工 / 結晶組織 / 引張双晶 / 電子線後方散乱回折 / 同視野観察 / 動的再結晶 / 双晶 / 引張特性 / 集合組織 / 変形双晶 / プレス成形性 / プレス成形
Outline of Research at the Start

マグネシウムは構造用金属の中で最も軽く、その密度は鉄鋼材料およびアルミニウムの1/4.5および2/3しかないため、自動車の軽量化・省エネルギー化に重要な役割を持つと期待されているが、強度と室温成形性の同時発現が難しく、安価な自動車の構造部材として使われることはなかった。本研究では、これまでの室温プレス成形型マグネシウム開発では注目されることの無かった「動的再結晶(展伸加工中に生じる再結晶)」を駆使した結晶粒径と集合組織の同時制御に挑戦し、既存自動車パネル用金属材料を凌駕する新しいマグネシウム合金圧延材を開発する。

Outline of Final Research Achievements

We clarified the unique texture development of a rolled Mg alloy fabricated by large-strain hot rolling. A Mg-3Al-0.4Mn (mass%) alloy was rolled using a rolling reduction ratio of 50 %, and post-annealing resulted in the formation of the vertical alignment of the (0001) planes to the rolling plane. Quasi-in-situ electron backscattered diffraction (EBSD) and transmission EBSD were used to investigate the microstructural development. We found that the formation of fine dynamically recrystallized grains and tension twinning contributed to the unique texture after the large-strain hot rolling and post-annealing.

Academic Significance and Societal Importance of the Research Achievements

既存マグネシウム合金圧延材は、室温成形性と強度特性を両立しないことが実用化の妨げとなっていた。これらの両立には、微細結晶組織と集合組織制御を同時に達成する必要があるものの、従来プロセスでは実現不可能であった。本研究成果として、大ひずみ圧延加工を行うことで、動的再結晶と引張双晶を促進させ、上記を同時に実現できる可能性を示した。大ひずみ圧延加工に適した合金組成や加工熱処理条件の最適化を進めることで、安価な生産コストで成形性と強度に優れるマグネシウム合金を提案できる可能性が高いため、本研究成果は、輸送機器の軽量化を促進する重要な技術になると期待される。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (28 results)

All 2024 2023 2022 Other

All Int'l Joint Research (3 results) Journal Article (10 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 10 results,  Open Access: 3 results) Presentation (13 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (2 results)

  • [Int'l Joint Research] University of Virginia(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Harbin Insititute of Technology/Anhui Polytechnic University(中国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ハルビン工業大学(中国)

    • Related Report
      2022 Research-status Report
  • [Journal Article] High-temperature load retention behavior of general-purpose wrought magnesium alloys2024

    • Author(s)
      中田 大貴, 松本 泰誠, 小川 正芳, 清水 和紀, 千野 靖正
    • Journal Title

      Journal of Japan Institute of Light Metals

      Volume: 74 Issue: 2 Pages: 66-72

    • DOI

      10.2464/jilm.74.66

    • ISSN
      0451-5994, 1880-8018
    • Year and Date
      2024-02-15
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of bimodal microstructure on strength and ductility of as-extruded Mg-Gd-Y-Zr alloy2024

    • Author(s)
      Z. Yang, C. Xu, S. Song, T. Nakata, S. Kamado
    • Journal Title

      Journal of Alloys and Compounds

      Volume: 972 Pages: 172742-172742

    • DOI

      10.1016/j.jallcom.2023.172742

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Why rolled Mg-Al-Ca-Mn alloys are less responsive to aging as compared to the extruded2023

    • Author(s)
      J.J. Bhattacharyya, T.T. Sasaki, T. Nakata, S.R. Agnew
    • Journal Title

      Scripta Materialia

      Volume: 233 Pages: 115513-115513

    • DOI

      10.1016/j.scriptamat.2023.115513

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Formation of unusual rolling texture in a Mg-Al-Mn alloy sheet by large-strain hot-rolling2023

    • Author(s)
      T. Nakata, C. Xu, L. Geng, S. Kamado
    • Journal Title

      Scripta Materialia

      Volume: 234 Pages: 115558-115558

    • DOI

      10.1016/j.scriptamat.2023.115558

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Unexpectedly formed strong basal texture in a rolled Mg-Zn-Ca-Mn alloy sheet2023

    • Author(s)
      T. Nakata, C. Xu, R. Abe, L. Geng, S. Kamado
    • Journal Title

      Materials Characterization

      Volume: 203 Pages: 113101-113101

    • DOI

      10.1016/j.matchar.2023.113101

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Origin of extension twinning-mediated static recrystallization and unique parallel alignment of (0001) poles to transverse direction in Mg-3Al-0.4Mn (mass%) alloy sheet2023

    • Author(s)
      T. Nakata, C. Xu, L. Geng, S. Kamado
    • Journal Title

      Journal of Magnesium and Alloys

      Volume: 11 Issue: 9 Pages: 3200-3213

    • DOI

      10.1016/j.jma.2023.09.007

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Towards tailoring basal texture of rolled Mg alloy sheet by recrystallization for high room-temperature formability: A review2023

    • Author(s)
      T. Nakata, S. Kamado
    • Journal Title

      Journal of Magnesium and Alloys

      Volume: 11 Issue: 11 Pages: 3992-4010

    • DOI

      10.1016/j.jma.2023.08.006

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] New strategy to achieve fine recrystallized microstructure and strength-ductility synergy in extruded Mg-Al-Zn alloy2023

    • Author(s)
      T. Nakata, R. Oki, S. Kanitani, Y. Matsumoto, M. Ogawa, K. Shimizu, S. Kamado
    • Journal Title

      Journal of Alloys and Compounds

      Volume: 968 Pages: 172003-172003

    • DOI

      10.1016/j.jallcom.2023.172003

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Role of dynamic recrystallization and grain growth on the formation of abnormal basal texture in a high-alloyed Mg-Al-Zn extruded alloy2023

    • Author(s)
      T. Nakata, S. Kanitani, Y. Matsumoto, M. Ogawa, K. Shimizu, S. Kamado
    • Journal Title

      Materialia

      Volume: 27 Pages: 101652-101652

    • DOI

      10.1016/j.mtla.2022.101652

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of micro-texture on tensile properties and room-temperature stretch formability of Mg-Al-Zn alloy sheet2023

    • Author(s)
      T. Nakata, T. Matsuno, R. Oki, S. Kamado
    • Journal Title

      Journal of Alloys and Compounds

      Volume: 938 Pages: 168519-168519

    • DOI

      10.1016/j.jallcom.2022.168519

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 難燃性Mg合金の開発とMg合金のスポーツへの応用2023

    • Author(s)
      中田大貴
    • Organizer
      KOSENフォーラム
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 時効硬化型Mg-Zn-Ca-Al-Mn合 金圧延材の引張および腐食特性に及ぼすZnおよびCa添加量の影響2023

    • Author(s)
      菊池海斗, 中田大貴, 宮下幸雄, 鎌土重晴, Li Zehao, 佐々木泰祐, 宝野和博
    • Organizer
      軽金属学会第145回秋期大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mg-Al-Mn合金圧延材の引張特性および室温成形性に及ぼすZn およびCa添加の影響2023

    • Author(s)
      Fifeey Reezam, 中田大貴, 鎌土重晴
    • Organizer
      軽金属学会第145回秋期大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 熱処理型Mg-Al-Zn-Ca-Mn合金板材の引張特性と室温成形性に 及ぼす圧延プロセスの影響2023

    • Author(s)
      内田陽良, 中田大貴, 鎌土重晴
    • Organizer
      軽金属学会第145回秋期大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 微細なMg2Sn析出相によるMg-Al-Mn合金板材の強度―成形性バランスの改善2023

    • Author(s)
      嶌田惇之介, 中田大貴, 鎌土重晴
    • Organizer
      軽金属学会第145回秋期大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mg-Y-Zn 合金の圧縮特性および腐食特性に及ぼす LPSO 相体積分率の影響2023

    • Author(s)
      庄内崇人, 中田大貴
    • Organizer
      第12回バイオマテリアル学会北陸信越ブロック若手研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mg-Al-Mn合金押出材の引張および圧縮特性に及ぼすCa添加と押出速度の影響2023

    • Author(s)
      松原大和, 中田大貴, 鎌土重晴
    • Organizer
      日本金属学会・日本鉄鋼協会北陸信越支部令和5年度連合講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 均質化レス押出しによるMg-Al-Mn合金の高性能化2023

    • Author(s)
      大川卓己, 中田大貴, 鎌土重晴
    • Organizer
      日本金属学会・日本鉄鋼協会北陸信越支部令和5年度連合講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 希薄Mg-Mn-Ca合金押出材の微細組織、腐食特性および引張特性に及ぼす添加元素量の影響2023

    • Author(s)
      東海尚希, 中田大貴, 鎌土重晴
    • Organizer
      日本金属学会・日本鉄鋼協会北陸信越支部令和5年度連合講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Development of a new age-hardenable magnesium alloy sheet with room-temperature formability and corrosion-resistance2023

    • Author(s)
      K. Kikuchi, T. Nakata, Z. Li, Y. Miyashita, T. Sasaki, S. Kamado
    • Organizer
      NIMS Award Symposium 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 優れた引張特性,室温成形性 および耐食性を有するMg-Al基合金の開発2022

    • Author(s)
      海部圭吾, 中田大貴, 鎌土重晴
    • Organizer
      軽金属学会第143回秋期大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 熱処理型マグネシウム合金の成形性に及ぼすG.P.ゾーン分散の影響2022

    • Author(s)
      Luo Xuan, 佐々木泰祐, 中田大貴, David Klaumunzer, 鎌土重晴, 宝野和博
    • Organizer
      軽金属学会第143回秋期大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 希薄Mg-Al-Zn-Ca-Mn合金圧延板材の微細組織および機械的性質の及ぼすAlおよびZn添加量の影響2022

    • Author(s)
      阿部良哉, 中田大貴, 鎌土重晴
    • Organizer
      日本金属学会・日本鉄鋼協会北陸信越支部令和4年度連合講演会
    • Related Report
      2022 Research-status Report
  • [Remarks] 先端軽金属材料研究室(研究室ホームページ)

    • URL

      https://mcweb.nagaokaut.ac.jp/~mgcenter/

    • Related Report
      2023 Annual Research Report
  • [Remarks] 先端軽金属材料研究室

    • URL

      https://mcweb.nagaokaut.ac.jp/~mgcenter/

    • Related Report
      2022 Research-status Report

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Published: 2022-07-05   Modified: 2025-01-30  

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