Laser welding of Zr45 Cu48A17 bulk metallic glass

In order to study the possibility of laser welding bulk metallic glass, two pieces of bulk metallic glass based on Zr45Cu48Al7 without crystallization were successfully welded laser welding.No crystallization was observed and no visible defect of crack was recognized in the bead and heated-affected zone (HAZ) under the condition of welding scanning speed of 8m/min with output laser power of 1.2kW.The temperature profile of the thermal cycle (temperature history) in the bead and HAZ indicates that the reason of non-crystallization of the sample is that the temperature in the bead and HAZ rapidly decreased to below 430℃ in glass formation from the melt.The laser welding method can be used to weld the bulk metallic glass successfully.