Loading...
Please wait, while we are loading the content...
Similar Documents
Machinability Performance of Powder Mixed Dielectric in Electrical Discharge Machining ( EDM ) of Inconel 718 With Copper Electrode
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lajis, M. A. Ahmad, Shahabaz |
| Copyright Year | 2015 |
| Abstract | This study mainly explores the effects of powder additive in dielectric fluid when electrical discharge machining of Inconel 718 by employing high Peak current and Pulse duration. Copper was selected as a tool. Peak current, Pulse duration, and Concentration of the nano Alumina powder were chosen as a variable parameter to study the EDM performance in terms of Material removal rate (MRR), Electrode wear rate (EWR) and Surface roughness (Ra). The experiment results show that, the MRR has improved significantly compared to without powder concentration at a high level of Peak current and Powder concentration for both electrodes. When EDM machining at 4g/l of powder concentration, the MRR is improved about 32% in comparison to the highest MRR value obtained without powder suspension dielectric. The maximum MRR value 45.70mm3/min was obtained at 40A of Peak current, 200μs of Pulse duration and 4g/l of powder concentration. In conventional EDM, the EWR is increased at high peak current and shortest pulse duration. But when powder suspension was applied, higher peak current and longer pulse duration was decreased the EWR. The lowest EWR value -0.244mm/min was achieved at the highest powder concentration 4g/l with the highest value of Peak current of 40A and the longest Pulse duration of 400μs. The negative value for EWR is indicated that the deposition effect has occurred on the electrode surface. The value of Ra also increased by increasing of peak current but decreased with longer pulse duration. The Ra value is worst when powder concentration was applied. The result suggested that, lower peak current with longer pulse duration and without powder additive in a dielectric is better for Ra. The lowest Ra value 8.98μm is obtained at 20A of Peak current and 400μs of Pulse duration without powder suspension dielectric. Index Term-Electrical discharge machining (EDM); Inconel 718; Aerospace material; Powder suspension dielectric; Machinability; Copper electrode |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ijens.org/Vol_15_I_04/153804-0707-IJMME-IJENS.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
