EDM machinability and parametric optimisation of 2014Al/Al2O3 composite by RSM

作者：Akhil Khajuria, Raman Bedi, Balbir Singh, Modassir Akhtar · 发表于：International Journal of Machining and Machinability of Materials · 年份：2018 · DOI：10.1504/ijmmm.2018.096380 · 被引用次数：16 · 研究领域：Advanced Machining and Optimization Techniques、Advanced machining processes and optimization、Advanced Surface Polishing Techniques

The present work investigates the machinability and influence of process parameters on the machining characteristics in EDM of AA2014/Al2O3 composite. The composite was fabricated through stir casting technique. Process parameters considered are current, voltage, pulse on time and wt.% reinforcement for the purpose of optimisation. Machining characteristics viz. MRR, TWR and SR are investigated. Experiments were designed by adopting rotatable centred composite design based on RSM. The machined surface is further analysed by SEM-EDS. Results revealed that MRR, TWR and SR increase with an increase in the current and pulse on time. However, less TWR and good surface finish are obtained at the lower setting of current, pulse on time and optimum setting of voltage and wt.% reinforcement. Performance measures recorded experimentally at optimum values of process parameters, i.e., 12 A current, 60 V voltage, 60 µm pulse on time and 5 wt.% Al2O3/AA2014 reinforcement are 0.1501 g/min MRR, 0.0032 g/min TWR and 9.367 µm SR.