2023 Fiscal Year Final Research Report
Development of perfect joint (jointless joint) technology and proposal of new structural materials
| Project/Area Number |
19H00826
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Medium-sized Section 26:Materials engineering and related fields
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
森貞 好昭 大阪大学, 接合科学研究所, 特任准教授 (00416356)
青木 祥宏 (アオキヤスヒロ) 大阪大学, 接合科学研究所, 特任講師 (70775642)
柳楽 知也 大阪大学, 接合科学研究所, 准教授 (00379124)
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | 接合 / ものづくり / 材料加工・処理 / 固相接合 / 短時間プロセス / 無変態 / 高強度 / 100％継手効率 |
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| Outline of Final Research Achievements |
A joining technology that can obtain a joint in which the structure of the joint is the same or equivalent to that of the base material and in which there is no metallurgically existing "interface" was defined as a "complete joining technology. The joining mechanism of this new joining method was clarified and its range of application was expanded.
In the field of alloy design, there are many alloy elements that originally improve the properties of the material but are not added due to concerns that they may reduce weldablity. For example, in steel materials, major elements such as C, P, S, B, and Cu fall into this category, but the establishment of complete joining technology that is performed at low temperatures has made it possible to utilize these elements. This study used specific examples to demonstrate the possibility of significantly expanding the field of material development by making maximum use of the characteristics of buried elements.
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| Free Research Field |
接合科学
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| Academic Significance and Societal Importance of the Research Achievements |
継手の機械的特性に変化のない、完全接合技術を確立した。これは、世界で初めて達成され、新規性、独自性、創造性が極めて高いと言える。これにより、これまで難接合という理由だけで、これまで用いられてこなかった材料、組成範囲に対して、新規鋼材の開発の可能性を開いた。このような新たな材料開発領域の拡大は、材料科学の発展に大きく寄与すると期待している。加えて、得られた構造物において、接合部の強度が母材と同等であることによって、接合部が構造物の特異点とならないという大きなメリットが生じることで、構造設計が格段に容易となり、時間とコストの大幅な削減に繋がる。
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