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Measurements of crucible voltage and temperature profiles were made during steady-state vacuum arc remelting of a 0.435 m diameter Alloy 7 18 electrode into 0.540 m diameter ingot in a coaxial furnace. The results are used to estimate the amount of current passing through the ingot/stool contact zone (Ii,) and the length of the ingot/wall contact zone (hi,). The estimates of Ii, varied linearly from -1000 A to -800 A over a range of ingot lengths extending from 0.8 to 1.6 m. hi, was determined to be very small, ~0.1 m. Additionally, the fraction of current passing through the top ingot surface was estimated to be between 0.5 and 0.8 from the data and physical arguments. This information is required to accurately model the pool shape and fluid flows in the liquid metal pool atop the ingot.

Current Paths During Vacuum Arc Remelting of Alloy 718