Magnetic Pulse Welding of Sheets – Process Modelling
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Date
2021-10-14
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Abstract
Magnetic pulse welding involves the application of a controlled electromagnetic impulse
and consequent high velocity impact between two overlapped parts, which leads to plastic
deformation and consolidation between the parts along the interface without melting. The
key variables in magnetic pulse welding include a high magnitude discharge energy of
damped sinusoidal nature, the coil type and geometry and the materials, thicknesses and
geometry of the overlapped metallic sheets. A computer-based coupled electromagnetic
and dynamic mechanical analysis of magnetic pulse welding of sheets is presented in this
work to provide an insightful understanding of the evolution of joints, which is otherwise
intractable for monitoring due to the high speed of the process and the presence of a high
electromagnetic field. The computed results show that such a computational process model
can serve as a robust design tool for a fundamental understanding as well as for the
identification of suitable conditions for achieving a defect-free, reliable joint.
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Keywords
magnetic pulse welding, high strain rate plastic deformation, high velocity impact investigation, electromagnetic field - pressure, finite element modelling, dissimilar sheets joining