2022 Fiscal Year Final Research Report
Development of surface modification technology for promotion of multi materials fabrication
| Project/Area Number |
19H02439
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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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| Review Section |
Basic Section 26030:Composite materials and interfaces-related
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
山本 卓也 東北大学, 工学研究科, 助教 (10804172)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | マルチマテリアル化 / 溶接・接合 / 表面塑性流動 / 傾斜機能付き複合層 / ショット衝突処理 / 高振幅超音波振動 |
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| Outline of Final Research Achievements |
Aiming to promote multi-material design and function integration, a new concept of interphase designing was first proposed and then applied to develop a new technology to fabricate composite gradient layers of fine particles dissimilar materials in metal substrates. This technology can be applied as a pretreatment method before plating or joining of metals with different materials. This technology uses a novel ultrasonic-assisted shot impact treatment process, proposed by the principal investigator earlier. In the process, shot impacts cause such phenomena as grinding of powder particles, plastic flow and formation of fine cracks in the metals substrate that eventually results in formation of composite layers. These phenomena were investigated first and then, based on the results, conditions of treatment process were optimized. After that, using a number of typical metals substrates and powders, samples were fabricated and characterized for microstructure, hardness and wear properties.
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| Free Research Field |
材料プロセス設計学
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| Academic Significance and Societal Importance of the Research Achievements |
マルチマテリアル化は、未来の社会基盤を支える重要な技術開発であるが、その長所を活かした異種材料の溶接・接合技術の発展には異種材料の組み合わせだけではなく、組立品間の接触界面の特性も大きな役割を果たしている。そのため、金属表面・界面特性の改質制御を効果的かつ柔軟に行うことが不可欠である。本研究では、複合層を利用した「界面設計」の概念を新しく提案して、金属表面の新規前処理技術及び対応可能な装置の開発を行った。その結果、従来技術では成膜・接合・溶接が困難であった異種材料の各加工が可能となる。本研究の成果は学術的価値が高く、マルチマテリアル化技術の発展に一石を投じるもので社会的意義があると考えている。
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