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Development of environment-friendly as-cast Ti alloys both by simplifying the manufacturing process and expanding the alloy compositional area

Research Project

Project/Area Number 18K11712
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 64030:Environmental materials and recycle technology-related
Research InstitutionHiroshima University

Principal Investigator

Matsugi Kazuhiro  広島大学, 先進理工系科学研究科(工), 教授 (30253115)

Co-Investigator(Kenkyū-buntansha) 崔 龍範  広島大学, 先進理工系科学研究科(工), 准教授 (00457269)
佐々木 元  広島大学, 先進理工系科学研究科(工), 教授 (30192595)
許 哲峰  広島大学, 工学研究科, 特任助教 (70620863)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords鋳放し使用Ti合金 / 合金設計 / 浮揚溶解 / 合金元素戦略 / 低コストチタン合金 / 省エネルギー製造プロセス / 鋳放し使用チタン合金 / 浮揚溶解・凝固 / 材質制御 / 省エネルギー合金 / 安価チタン合金 / 鋳放し使用合金 / 製造プロセスの簡素化 / 格子定数 / 相境界 / 引張特性 / 凝固偏析 / 環境対応合金 / 鋳放使用 / 環境対応型チタン合金 / 変形挙動タイプ / 金属元素戦略 / 省エネルギープロセス / 環境対応Ti合金 / 組成最適化 / 製造プロセス最適化
Outline of Final Research Achievements

In order to develop a high-performance β-type Ti alloys in the as-cast state, the composition was proposed in the phase boundary diagram using the electronic parameters Bo and Md. The compositions were proposed by estimating the characteristics from the degree of solidification segregation and deformation behavior, and the microstructure was controlled by the only CCLM / solidification process. The price of the commercial 15-3-3-3 alloy for complicated post-treatment can be expected to be reduced by about 40% by omitting post-treatment. Developed by alloy design and microstructure control. The as-cast alloy has the same characteristics as the commercial alloy, and an energy saving effect of 35% was obtained. For example, Ti-5Cr-5Mn-2.5Zr-2Fe and Ti-10.5Cr-5.4Mn-2.4Zr-1Al alloys had yield stress of 950MPa, tensile strength of 1030MPa, fracture elongation of 10% or more, and higher corrosion resistance, compared with commercial 15-3-3-3 alloy.

Academic Significance and Societal Importance of the Research Achievements

Ti合金最終コストは、原材料費用を1、鋳造費が0.5、後処理が1.5となり、航空機用途の場合、2次加工費は2と推定でき、後処理簡素化が急務である。しかし単一の鋳造プロセスのみで組織・材質制御までを達成することは、有史以来例をみない。鋳放し状態では元素の凝固偏析、非平衡相の出現、構成相の不安定性、組織構造の不健全性が問題となる。金属学・材料開発が提唱されて以来、高性能化には希少金属元素の合金化と製造プロセスの複雑化で対応してきた。ユビキタス元素多用、製造プロセス簡素化は、製造プロセス原理と合金化学の相関をマルチスケールで解明して理論化すると言う集大成でのみ成就でき、目下の環境保全にも最適である。

Report

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

    (12 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (5 results) (of which Invited: 4 results)

  • [Int'l Joint Research] 燕山大学(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] 燕山大学(中国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Possibility of As-Cast Applications on β-Type Titanium Alloys Proposed in the Newly Expanded Area of <i>Bo<sub>t</sub>-Md<sub>t</sub></i> Diagram2020

    • Author(s)
      Ma Xi-Long、Matsugi Kazuhiro、Xu Zhe-Feng、Choi Yong-Bum、Matsuzaki Ryohei、Lin Zi-Feng、Liu Xin-Gang、Huang Hao
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 61 Issue: 4 Pages: 740-749

    • DOI

      10.2320/matertrans.F-M2020803

    • NAID

      130007815396

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2020-04-01
    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Applicability of As-Cast on β Type Titanium Alloys Proposed in the Compositional Region with Different Tensile Deformation Types2019

    • Author(s)
      Xi-Long Ma, Kazuhiro Matsugi, Zhe-Feng Xu, Yong-Bum Choi, Ryohei Matsuzaki, Jie Hu, Xin-Gang Liu and Hao Huang
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 60 Issue: 11 Pages: 2426-2434

    • DOI

      10.2320/matertrans.F-M2019848

    • NAID

      130007733083

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2019-11-01
    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Optimization of both composition and manufacturing process for α-type titanium alloys and their characterizations2019

    • Author(s)
      Xilong Ma, Kazuhiro Matsugi, Zhefeng Xu, Yongbum Choi, Ye Liu, Jie Hu, Xingang Liu and Hao Huang
    • Journal Title

      Proc. The Tenth Pacific Rim International Conference

      Volume: - Pages: 572-579

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cold crucible levitation melting of near-a titanium alloys and their characterizations2019

    • Author(s)
      Ma Xi-Long、Matsugi Kazuhiro、Xu Zhe-Feng、Choi Yong-Bum、Y.Liu、J. Hu、X.G.Liu、H. Huang
    • Journal Title

      日本鋳造工学会中国四国支部会報

      Volume: 41 Pages: 37-41

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Possibility of as-cast applications on β-type titanium alloys for energy-saving measures2018

    • Author(s)
      Xi-Long Ma, Kazuhiro Matsugi, Ryohei Matsuzakii, Zhe-Feng Xu, Yong-Bum Choi, Jie Hu, Xin-Gang Liu and Hao Huang.
    • Journal Title

      Jointly organized by Japan Foundry Engineering Society and Korea Foundry Society

      Volume: 172 Pages: 1-2

    • NAID

      130007589949

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 鋳造プロセスと合金組成の両最適化による難創製材料の材質制御の基礎2021

    • Author(s)
      松木一弘
    • Organizer
      日本鋳造工学会 第3回オンライン講座
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 低コスト製造プロセス適用型のβチタン合金の設計2020

    • Author(s)
      衛 天陽、井ノ下大誠、崔 龍範、松木一弘
    • Organizer
      日本金属学会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 鋳放使用可能なNear-α型チタン合金の設計と特性評価2019

    • Author(s)
      馬 喜龍、松木 一弘、許 哲峰、崔 龍範
    • Organizer
      広島大学, 産学地域連携センター
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] α型チタン合金の組成と製造プロセスの両最適化と特性評価2019

    • Author(s)
      馬 喜龍、松木 一弘、許 哲峰、崔 龍範、劉 燁、劉 剛、黄 浩
    • Organizer
      日本鋳造工学会, 第174回全国講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Propose of titanium alloys using the Bot-Mdt diagram, and their as-cast applicability2019

    • Author(s)
      Xilong Ma, Kazuhiro Matsugi, Zhefeng Xu, Yongbum Choi, Ye Liu, Ryohei Matsuzaki and Zifeng Lin
    • Organizer
      鋳 物 第 24 委 員 会, 鋳 造 プ ロ セ ス 分 科 会 第 23 回 会 議
    • Related Report
      2019 Research-status Report
    • Invited

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Published: 2018-04-23   Modified: 2022-01-27  

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