Experimental and numerical simulation of magnetic pulses for joining of dissimilar materials with dissimilar geometry using electromagnetic welding process
Affiliations: [a] Department of Mechanical Engineering, University College of Engineering Panruti, Panruti-607106, India | [b] Industrial Automation and Instrumentation Division, School of Electrical Engineering, VIT University, Vellore, India | [c] Department of Electrical Engineering, AMET University Kanathur, Chennai, Tamil Nadu, India
Correspondence:
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Corresponding author: S. Muthukumaran, Department of Mechanical Engineering, University College of Engineering Panruti, Panruti-607106, India. E-mail:smuthukumaran@annauniv.edu
Abstract: In this paper the joining of dissimilar metal couple SS-Cu employing the
magnetic pulse welding (MPW) technique that deploys magnetic pressure to
force the primary metal against the target metal cleansing away contaminants
from surface while driving intimate metal-to-metal contact, producing a
weld. MPW process is very fast, produces no heat affected zone (HAZ) and may
be performed without filler metals and protective gases. Nevertheless, a
thin film (10 to 40 μ m) of two welded metals in the form of
intermetallic phases were observed, in which melting and solidification
processes took place. This paper focuses on the interface for studying the
typical wavy pattern and mutual diffusion of elements happening in the zone.
The transition zone is composed of elements intermetallics, micro cracks and
micro pores. The weld interface composition, structure and morphology were
studied by optical and scanning electron microscopy (SEM). Energy-dispersive
spectrometry (EDS) was used in order to evaluate the local distribution of
alloying elements at the joint interface and its vicinity and also
Nano-hardness tests were performed across the bonding zone at regular
increments. The results of joints characterization allowed determining the
optimal MPW process parameters.
