Summary of research work reported on optimization studies related to EDM/WEDM of Nimonic superalloys.
|Reference||Work/electrode/dielectric||Input parameter||Output parameter||The focus of the work||Remark/Discussion|
|||Nimonic 75/ Cu and brass/spark erosion oil||TM, IP, Vg, Ton, Toff, Tool lift time (TLT)||MRR, TWR, SR||MOO during EDM||Optimum parameters using Taguchi based grey relational analysis are TM = Cu, IP = 12 A, Vg = 500 V, Ton = 200 μs, Toff = 15 μs, TLT = 2 s|
|||Nimonic 75/Cu, brass||TM, Ton, Toff, TLT, Vg, gap current||MRR, TWR, SR||MOO during ultrasonic-assisted EDM||Optimal parameters from Taguchi- grey relational analysis: TM = Cu, Ton = 200 μs, Toff = 15 μs, TLT = 2 s, Vg = 15 V, gap current = 12 A|
|||Nimonic 90/Cu/kerosene (powder = Si)||Powder concentration, discharge current, spark on duration, spark off duration||SR, recast layer thickness||Experimental instigation of powder-mixed EDM||Powder concentration = 12 g/L, discharge current = 3 A, spark on duration = 35 μs, spark off duration = 49 μs|
|||Nimonic 80A/ zinc-coated brass wire electrode||IP, Ton, Toff, FR||SR||Optimization during WEDM||From ANOVA, SR increases with a decrease in the Toff; SR is minimized by increasing the Ton and IP|
|||Nimonic 80A/ Mo/de-ionized water||Duty factor (DF), Vg, FR||MRR, wire wear ratio, SR||Optimization during WEDM||Dominant factor is DF; increase in DF all output responses increase; optimum parameters are DF = 0.8771, Vg = 17 V and FR = 17 m/min|
|||Nimonic C263 /Cu, W, and Cu-W/ kerosene||IP, Vg, Ton, DF, TM||SEC, machining noise, MRR, TWR, SR, radial over cut||Sustainable EDM to evaluate and optimize the responses||Optimal values from hybrid optimization; IP = 3 A, Vg = 60 V, Ton = 100 μs, DF = 85%, TM = Cu
Ton has great influences on SEC; IP, and TM have a significant impact on noise, TWR, and MRR; IP is a dominant factor for SR
|||Nimonic 80A/ Cu/ kerosene||IP, Ton, Toff||SR and MRR||MOO during EDM of Nimonic 80A||Optimum RSM parameters; IP = 13.49 A, Ton = 150 μs, Toff = 4 μs; Ton shows the stronger effect on MRR followed by IP and Toff; Ton has both positive and negative impact on SR|
|||Nimonic 80A/ brass wire/de-ionized water||IP, Vg, duty cycle, wire- speed||MRR and kerf width||Experimental investigation of WEDM of Nimonic 80A and MOO||RSM optimum WEDM parameters: IP = 57 A, Vg = 90 V, duty cycle = 75 μs, wire speed = 7 mm/min; IP shows high impact on MRR and kerf width|
|||Nimonic 901/ Cu–W||Ton, IP, servo voltage, powder concentration||SR, TWR, MRR||Optimization of parameters of powder‑mixed EDM||From statistical results optimum parameters were Ton = 20 μs, IP = 5 A, servo voltage = 5 V, powder concentration = 10 weight%|
|||Nimonic 90 /Cu||Ton, Toff, IP, powder concentration||SR, TWR, MRR||Optimization of parameters of powder (µ-titanium carbide) ‑ mixed EDM||Grey relational analysis based optimum parameters were Ton = 30 μs, Toff = 2 μs, IP = 20 A, powder concentration = 4 g/L|
|||Nimonic C263/Mo||Ton, Toff, IP, voltage||SR, MRR, cycle time||Optimization of the WEDM process||Ton and Toff most influencing parameters; optimum parameter for MRR were Ton = 30 μs, Toff = 8 μs, IP = 4 A, voltage = 80 V|
|||Nimonic 80A/ CBN grinding wheel||Air pressure, DOC, rotational speed, vibration intensity, stand-off-distance||Normal force, tangential force, SR||MOO of parameters of ultrasonic-assisted grinding||Optimum parameters from the statistical analysis: air pressure = 4 bar, DOC = 49.10 μm, rotational speed = 2198.02 RPM, vibration intensity = 56.85%, stand-off-distance = 52.99 mm|
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