Characterization of the gas tungsten arc welded Cu54Ni6Zr22Ti18 bulk metallic glass weld

Gas tungsten are welding is well-established joining process for the structural materials. Due to the localized heat input, the non uniform temperature distribution in weld is inevitable. In this regard, the thermal instability of the bulk metallic glass [BMG] should be considered for the weldability. Microstructure and phase evolutions of the Cu54Ni6Zr22Ti18 BMG weld were investigated and the fusion welded BMG weld is defined and the solid-state crystallization of the heat affected zone made the weld brittle. Furthermore, the thermal stress induced crack was propagated along the crystallized heat affected zone.