Analysis of local characteristics and microstructure of dissimilar metal interface in scrubbing refill friction stir spot welding joint. (2nd September 2022)

• Record Type: Journal Article
• Authors: Takeoka, Naoki; Tsuchida, Taisuke; Matsuda, Tomoki; Ogura, Tomo; Ohashi, Ryoji; Hirose, Akio
• Is Part Of: Welding international. Volume 36:Number 9(2022)
• Page Start: 555
• Page End: 567
• Publication Date: 2022-09-02
• Subjects: Dissimilar metal joining -- friction stir spot welding -- refill friction stir spot welding -- interfacial strength -- microscale testing; Welding -- Periodicals; Welding -- Automation -- Periodicals; 671.52
• DOI: 10.1080/09507116.2022.2125652
• Languages: English
• ISSNs: 0950-7116

Abstract

Abstract: Friction stir spot welding (FSSW) is one of the solid-state welding methods and dissimilar material joining by FSSW has been investigated. 'Scrubbing refill FSSW (Sc-RFSSW)' has developed as a new dissimilar material joining method, and it was shown that Sc-RFSSW provides higher joint strength than conventional FSSW methods in joining the aluminum alloy and non-coated steel. In this study, the microscale testing was performed to evaluate the dissimilar material interfacial strength of Sc-RFSSW joints. The relationship between the interfacial strength distribution and the macroscopic strength of the Sc-RFSSW joint was analyzed. In addition, the microstructure of the dissimilar material interface was observed, and the relationship between the microstructure and the interface strength was shown.