Pulsed Nd:YAG laser welding of Cu54Ni6Zr22Ti18 bulk metallic glass

Pulsed Nd:YAG laser was used to weld Cu54Ni6Zr22Ti18 (numbers indicate at.%) metallic glass with glass forming ability of 6 mm. Through a single pulse irradiation on the glassy plate, the pulse condition for welding without crystallization was investigated. Under the selected pulse condition, the Cu54Ni6Zr22Ti18 plate was periodically welded with different welding speeds. For the welding speed of 60 mm/min, no crystallization was observed in both weldment and heat-affected zone. For the 20 mm/min, the crystallized areas with a band shape were observed along the welding direction.