Materials Transactions, Vol.46 No.06 (2005) pp.1440-1442
© 2005 The Japan Institute of Metals

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

Jonghyun Kim^1,, Seungyong Shin¹ and Changhee Lee²

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.

(Received 2005/3/14; Accepted 2005/5/16; Published 2005/6/15)

Keywords: Cu₅₄Ni₆Zr₂₂Ti₁₈ bulk metallic glass, Gas tungsten arc welding, Heat affected zone

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