논문 해외 국제전문학술지(SCI급) Refill Friction Stir Spot Welding of Dissimilar AA6014 Al Alloy and Carbon-Fiber-Reinforced Polymer Composite
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2021-04
- 저자명 김정한,ASHONG ANDREWS NSIAH,이목영,홍성태,이연승
- 학술지명 METALS AND MATERIALS INTERNATIONAL
- 발행처명 KOREAN INST METALS MATERIALS
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 5
홈페이지논문 초록 (Abstract)
Both Al and carbon-fiber-reinforced polymer (CFRP) are being investigated as lightweight materials for automobile applications. To form effective hybrid materials from Al and CFRP, strong bonding between these two dissimilar materials is critical. Here, we analyzed the microstructure and tensile shear strength of joints between an Al alloy (AA 6014) and CFRP fabricated using refill friction stir spot welding (RFSSW). A maximum tensile shear load of 1.6 kN was measured for untreated AA 6014/CFRP specimens. Microscopy images of the Al-CFRP joints exhibited tight bonding along the joint interface without any noticeable defects. Moreover, Al-O-C, C-C, and C=O chemical bonds were detected on the tensile-shear fracture surfaces of both the Al alloy and CFRP sheets using X-ray photoelectron spectroscopy. Micro-mechanical interlocking and chemical bond formation were the key factors contributing to the tensile shear strength of the RFSSW joint. This study demonstrated that the RFSSW technique is a suitable bonding method for manufacturing metal-polymer hybrid structures.