|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Defects and Properties of Cast Metals IV
||Elucidating the relationship between arc behavior and solidification defects during Vacuum Arc Remelting of Superalloys
||Daniel McCulley, Joshua Motley, Matthew Cibula, Paul E. King
|On-Site Speaker (Planned)
Measurements of external magnetic fields during vacuum arc remelting (VAR) provide information on the distribution and location of arc distributions during processing. Arc dynamics have been proven to be connected to solidification defects through disturbances in the heat flux and the generation of conditions that lend themselves to inclusion entrainment. An enticing pathway to ensure and/or improve the quality of certain superalloys is through monitoring and control of the arc dynamics. Ampere Scientific has shown the ability to distinguish between normal and off-normal arc conditions during operations through careful analyses of magnetic fields generated by the arcs across the arc gap. For example, constricted arcs during superalloy processing have no overt signature in traditional VAR process signals, however the magnetic field variances provide instantaneous feedback as to their occurrence. Here we present our work towards characterizing the relationship between arc behavior and solidification defects using the VARmetric measurement system.
||Solidification, Process Technology, Modeling and Simulation