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.

Waspaloy 是一种镍基合金，由于其在较高温度下的强度保持能力、更好的耐腐蚀性和韧性，其应用主要定位于航空航天工业。采用响应面法(RSM)多响应优化技术对Waspaloy合金加工过程中的放电加工参数进行优化。各种控制因素如峰值电流、电压、占空比和冲洗压力被选择为三个级别。选择材料去除率 (MRR) 和表面粗糙度 (SR) 作为研究加工特性的响应参数。具有五个中心点的中心复合设计用于实验设计。为更高的 MRR 和更低的 Sr 确定了最佳的最佳控制参数集。实验已经通过使用方差分析进行了验证，并进行了确认测试。从 RSM 中得出钻孔的最佳加工条件，即电压：125 V，冲洗压力：0.8 kg cm⁻²和峰值电流：22 A 和 20% 的占空比已被确定。此外，这项研究通过使用扫描电子显微镜突出了重铸层的形成和影响。