Characterization of the Gas Tungsten Arc Welded Cu₅₄Ni₆Zr₂₂Ti₁₈ Bulk Metallic Glass Weld

Abstract

Gas tungsten arc 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.