2022 Fiscal Year Final Research Report
Development of metal-CFRTP multi-material joining technology using special shape electrodeposited film
| Project/Area Number |
20K15045
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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 26040:Structural materials and functional materials-related
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| Research Institution | Gunma University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 異種材料接合 / マルチマテリアル / めっき / CFRTP / ステンレス鋼 / アルミニウム合金 / 引張せん断試験 / ガルバニック腐食 |
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| Outline of Final Research Achievements |
Dissimilar material joining technology is an important element in the multi-materials of automotive structural materials. This study aimed to develop a practical joining technology for dissimilar materials using special shape electrodeposited films. The formation mechanism of Ni-Cu alloy electrodeposited films with fine irregularities was elucidated by electrochemical methods. The effect of Ni-Cu alloy plating bath composition on the joining properties of stainless steel/carbon-fiber-reinforced thermoplastic (CFRTP) and aluminum alloy/CFRTP joints using the Ni-Cu alloy electrodeposited films was determined. Furthermore, the galvanic corrosion behavior between stainless steel and aluminum alloy with the Ni-Cu alloy electrodeposited films and CFRTP was clarified.
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| Free Research Field |
材料工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、樹状構造体を有するNi-Cu合金めっき膜を付与した金属とCFRTPとの接合において、めっき浴組成と接合特性の関係を明らかにしたことで、提案する異種材料接合プロセスに関して知見が得られたものと考える。また、耐食性について、金属とCFRTPを直接接合した場合は金属とCFRTP中の炭素繊維の電位差に起因し金属が腐食されることが問題となるが、対策法を検討した異種材料接合技術に関する報告は少ない。本研究では、金属とCFRTPの腐食挙動を電気化学的に検証し、Ni-Cu合金めっき膜による耐食性の効果を明らかにした。
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