Abstract
Waspaloy is one of the nickel-based alloys and its application is mostly positioned in the aerospace industry owing to its strength retaining capacity at higher temperature, better corrosion resistance, and toughness. Multi-response optimization technique, response surface methodology (RSM) was adopted to optimize the electrical discharge machining parameters during machining of Waspaloy. Various control factors such as peak current, voltage, duty cycle, and flushing pressure were selected with three levels. The material removal rate (MRR) and surface roughness (SR) were selected as response parameters for investigating the machining characteristics. A central composite design with five center points was used for experimental design. The best optimal set of control parameters were identified for the higher MRR and lower Sr The experiments have been validated by using analysis of variance and a confirmation test was conducted. From RSM, the optimum machining conditions for drilling the hole, namely, voltage: 125 V, flushing pressure: 0.8 kg cm−2, and peak current: 22 A and duty cycle of 20% have been identified. Further, this investigation highlights the formation and the effect of the recast layer by using scanning electron microscopy.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
