Consolidation of Metallic Glass Ribbons Using Electric Discharge Welding

摘要

The purpose of this communication is to describe results of electrical discharge microwelding of metallic glass ribbon. The motivation for this undertaking was to study the feasibility of the technique in producing bulk geometries by joining thin ribbon metallic glass. Previous attempts reported in the literature include shock explosive compaction, warm pressing, and laser welding. Characteristics associated with these lamination techniques are extensive crystallization, cracking, and interlayer oxidation. A high voltage 510 micro farad CAPACITOR discharge device was adapted to consolidate multiple layers of metallic glass ribbon. The potential of the capacitor bank was varied between 2.25 kV and 10kV, corresponding to stored energies of 1.3 kJ to 25.5 kJ, respectively. Two alloy foils were consolidated: iron-based METGLAS 2605S-2 (Fe78Si9B13) cobalt-based METGLAS 2705M (Co69Fe4Ni1.5Mo1.5B12Si12). Both were supplied by Allied Corporation in the form of 20 micro meters thick melt-spun ribbon. Four pieces of material 25mm x 25mm were stacked and pressed between electrodes to low (80 MPa) or high (200 MPa) pressure, metallic alloys. Reprints. (jes)