Abstract
Friction stir welding is enable to fabricate dissimilar materials joint which is difficult for conventional fusion welding. Thus, the method is promising way to fabricate multi-material structure for achieving weight reduction and high functionalization. Lap welding with spot weld (0D shape), butt welding with linear weld line (1D shape) and curved weld line (2D shape) were achieved for dissimilar welding between aluminum and steel. From the study, the shape change of weld line influence on heat input, material flow, and the process window of welding. The weldability with 3D shape weld line was investigated by friction stir girth welding between aluminum (AA6063) and steel (S45C) rods with 53 mm in diameter. It was difficult to fabricate defect free weld by friction stir girth welding without tool tilt angle. However, defect free weld was fabricated by friction stir girth welding with tool tilt angle. From the observation of material flow in the weld by X-ray CT, optimum material flow is generated in the weld. During welding, welding force and temperature increased with rotation of weld materials. These affected to the microstructure of weld with increasing the area of HAZ and softening the microstructure of weld. Fracture strength was 63.5 kN, and weld strength was about 117 N/mm2 and slightly lower than the strength of base metal.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
