Abstract
The aim of this work is to optimize the process parameters and to analyze the evolution of mechanical and microstructural properties during CMT spot weld-brazing of dissimilar materials aluminium-steel. In doing so, process parameters including hold time, hole diameter and pre-setting gap were optimized using Taguchi orthogonal design and then the microstructure of the interfacial region was characterized using optical microscopy, scanning electron microscopy and X-ray diffraction. Shear-tensile testing was performed to evaluate the load-bearing capacity of the joints. It was observed that the strength of spot weld-brazed joints is primarily dependent on the interfacial area and intermetallic compounds at the interface. High hold time and wider hole diameter resulted in poor joint strength due to excessive intermetallic formation and an unfilled region in the joint. In addition, Cyclogram revealed that the joining process was comparatively unstable for the wider hole and high hold time due to the formation of zinc fumes. The provision of a pre-setting gap in between the sheets showed a positive impact on the joint strength.
Sign-in/Register to access full text options 
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 callMore From: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
Disclaimer: 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.
