| Project/Area Number |
22K14511
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Osaka University |
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Principal Investigator |
GENG PEIHAO 大阪大学, 接合科学研究所, 特任講師 (40900064)
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| Project Period (FY) |
2022-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2022: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | Al/CFRP joining / Friction spot joining / Al/CFRP / Interface structure / Performance control / Novel tool / Friction welding |
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| Outline of Research at the Start |
Research on joining of Al alloys to CFRTP is of great interest due to the growing demand for lightweight construction in the transportation industries. This project aims to quantitatively elucidate the bonding formation mechanism and bubble formation mechanism in friction assisted joining of Al alloy and CFRTP, and then clarify strengthening mechanism of novel tools to improve joint strength. The applicant’s preliminary research proved the feasibility of novel tool with concave-shoulders, the dimensional parameter will be optimized and the resultant strengthening mechanism is elucidated.
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| Outline of Final Research Achievements |
We invented a friction heat-assisted joining technology for aluminum/polymer materials based on a new friction tool design. The new friction tool solves the problem of thinning in the core area of joints in traditional processes through regional friction heat generation and local plastic deformation control of aluminum. Compared with the traditional process, the joint strength is significantly improved. By further optimizing the tool geometric parameters, this technology has initially achieved high-strength Al/CFRP spot joint with different size specifications.
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| Academic Significance and Societal Importance of the Research Achievements |
The Al/CFRP friction-assisted joining technology uses a new concave shoulder tool design to achieve high-strength spot joining of Al/CFRP thin plates. As a new lightweight joining technology, it helps promote the application of Al/polymer material hybrid structure in new energy vehicles.
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