| Abstract Scope |
Ultrasonic Assisted Electrical Discharge Machining (UAEDM) is a hybrid machining process in which small amplitude vibrations of ultrasonic frequency are imparted to either electrode, work material or dielectric fluid in conventional EDM process, for effective flushing, hence leading to improved efficiency and consistency.
The present study presents UAEDM of Inconel 718 work material. During experimentation, process parameters namely copper tool electrode geometry (circular and square) vibrated at 20 KHz frequency, discharge current, servo voltage, pulse on duration, pulse off duration and tool lift time were varied to find their effect on response characteristics i.e., material removal rate, surface roughness and electrode wear rate.
Experiments have been performed according to Taguchi’s L18 mixed-level orthogonal array. Multiple objective optimization of performance characteristics have been done using Taguchi based Grey Relational Analysis (TGRA) technique. Furthermore, surface morphology, metallurgical characteristics (Phases, crystallite size) and microhardness of the machined surface are also studied. |