Innovation of bulk nano-structured commercial purity Ti with utra-high strength and high ductility utilizing TWIP effect
| Project/Area Number |
17H03409
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
三浦 博己 豊橋技術科学大学, 工学(系)研究科(研究院), 教授 (30219589)
都留 智仁 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 原子力基礎工学研究センター, 研究職 (80455295)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2019: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
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| Keywords | 工業用純チタン / 巨大ひずみ加工 / バルクナノメタル / 生体用インプラント / 双晶誘起塑性 / 双晶誘起組成 |
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| Outline of Final Research Achievements |
Microstructure and mechanical properties of ultrafine-grained bulk nano-structured commercial purity titanium (BN-Ti) were systematically investigated. It was clarified that the larger the pass strain during the multi-directional forging processing, the finer the grains, and the higher the strength. The deformation mechanism of the BN-Ti transitions from "prismatic slip + pyramidal slip" to "prismatic slip + deformation twinning" as the grain size increases. The deformation mechanisms were also discussed from the viewpoint of computational mechanics.
The BN-Ti has attractive properties as a biomaterial. The surface treatments of BN-Ti were carried out, and the biological contact behavior of the bone cells was investigated. The BN-Ti after the surface treatments exhibited that the contact angle of bone cells was extremely small and the biological reaction was superior, compared with the conventional commercial purity Ti.
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| Academic Significance and Societal Importance of the Research Achievements |
BN-Tiの変形メカニズムの結晶粒径依存性，及び変形メカニズムに与える微量元素の効果について，実験的・計算機理学的な検討から，系統的に明らかにする事ができた．得られた結果を作製プロセスへフィードバックすることで，BN-Tiの合金設計・創造プロセスへの指導原理を構築することができた．さらに，骨細胞との生体反応を調査し，市販Tiよりも優れていることも示し，生体用インプラントへの応用の可能性も示した．
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Report
(4 results)
Research Products
(36 results)
