Influence of external axial magnetic field on shielded metal arc weld properties for high strength low alloy steel

Abstract

The influence of alternating axial magnetic (AMF) field on the bead geometry and mechanical properties were analyzed for shielded metal arc welding. The ASTM A516 grade 70 carbon steel plates were fabricated with alternating AMF generated by a solenoid coil installed coaxially with the filler metal. The effects of welding parameters, with or without magnetic field density and magnetic frequency, were studied on the bead geometry, such as bead width, bead height, penetration depth, and mechanical properties like tensile strength and impact strength. It was reported that magnetic frequency and magnetic field density also play an essential role besides welding current and welding speed towards weld bead and strength improvement.