“…Amidst the several alloys of Mg, AZ91C alloy is one of the well-known cast alloys because of its higher strength, admirable resistance to corrosion and attractive cast-ability. At the same time, the welding of AZ series (including AZ91C) of Mg alloys by employing all types of conventional fusion welding methodologies has only resulted in the attainment of coarse and porous microstructures, large residual category stresses, severe deformities, etc., in the joints [9,10]. The major reason for these defective joints is that, during fusion welding, the enormous temperature of solidification causes the constituents of AZ91C alloy (Mg–Al–Zn) to react with Al, thereby generating eutectic with a lower melting point, leading to the escalation in the tendency towards cracking by heat [11,12].…”