Generation of 0.5 to 0.6 Mega Gauss Pulse Magnetic Field for Magnetic Pulse Welding of High Strength Alloys

Magnetic Pulse Welding (MPW) is a solid state welding process to join high strength alloys and dissimilar materials. In this technique, the joining is realized by the impact of job pieces at 150 m/s to 1500 m/s caused by an action of pulse magnetic field. The pulse magnetic field of > 50 T is generated inside the welding coil by the discharge of 40 kJ capacitor bank. Pulse discharge current of 132 kA and 112 kA is pumped in five turn disk coil and five turn disk coil with field shaper, which produces a magnetic field of 60 T and 50 T in 10 mm bore diameter of respective coils. This magnetic field exerts a pressure on the tubular job piece and accelerates it to impact at high velocity and obtains a weld. The inner region of the coils got deformed during welding of job pieces due to the high stress in the inner region. The construction details of multi turn disk coil and multi turn disk coil with field shaper for pulsed magnetic field generation and welding of SS316L tube of 0.5 mm thickness and 6.5 mm diameter to SS316L rod is presented in the paper.