Experimental investigation on electrochemical discharge machining of hastelloy
The study examines the influence of various process parameters on Material Removal Rate (MRR), Tool Wear Rate (TWR) AND Surface Roughness (R _a ) during the machining of Hastelloy using Electrical Discharge Machining (EDM) machined under NaOH dielectric medium. Results showed that a 20% NaOH concent...
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| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ad8ffd |
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| author | Kanulla Karthik Ranjith R Venkatrami Reddy Veduru Kawin Nallasivam |
| author_facet | Kanulla Karthik Ranjith R Venkatrami Reddy Veduru Kawin Nallasivam |
| author_sort | Kanulla Karthik |
| collection | DOAJ |
| description | The study examines the influence of various process parameters on Material Removal Rate (MRR), Tool Wear Rate (TWR) AND Surface Roughness (R _a ) during the machining of Hastelloy using Electrical Discharge Machining (EDM) machined under NaOH dielectric medium. Results showed that a 20% NaOH concentration optimizes MRR at 0.889 mm ^3 min ^−1 , while higher concentrations lead to process instability due to excessive bubble formation and discharge irregularities. The optimal current of 30 A improves MRR, but excessive melting occurs beyond this level, negatively impacting tool wear and surface finish. A pulse-on time of 45 μs produces the best surface finish of 1.786 μm), while longer pulse durations cause overheating and degrade surface quality. TWR was minimized at a gap distance of 2 mm, which allowed effective cooling and debris removal, reducing wear by 15%. Voltage levels between 12 V and 18 V resulted in the most stable discharges, yielding optimal MRR and Ra values. Lower current values stabilize TWR, while higher currents and longer pulse-on times increase wear. A gap distance of 2 mm minimizes TWR by ensuring effective cooling and debris removal. Optimal surface roughness is achieved with 30 A and 45 μs, where controlled discharges reduce surface imperfections. Higher NaOH concentrations induce rougher textures due to more aggressive sparks. SEM analysis confirms that process parameters significantly impact surface topography, characterized by craters, re-solidified debris, and microcracks. The optimized parameters identified from the results were 20% NaOH concentration, 30 A current, 45 μs pulse-on time, 2 mm gap distance, and voltage of 15 V. |
| format | Article |
| id | doaj-art-4239bfc094924c2785c3d6698f150a95 |
| institution | Kabale University |
| issn | 2053-1591 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj-art-4239bfc094924c2785c3d6698f150a952024-11-19T11:57:53ZengIOP PublishingMaterials Research Express2053-15912024-01-01111111651610.1088/2053-1591/ad8ffdExperimental investigation on electrochemical discharge machining of hastelloyKanulla Karthik0Ranjith R1https://orcid.org/0000-0001-5278-5039Venkatrami Reddy Veduru2Kawin Nallasivam3Department of Mechanical Engineering, SNS College of Technology , Affiliated to Anna University, Tamil Nadu, IndiaDepartment of Mechanical Engineering, SNS College of Technology , Tamil Nadu, IndiaDepartment of Mechanical Engineering, SNS College of Technology , Affiliated to Anna University, Tamil Nadu, IndiaDepartment of Mechanical Engineering, Kongunadu College of Engineering and Technology , IndiaThe study examines the influence of various process parameters on Material Removal Rate (MRR), Tool Wear Rate (TWR) AND Surface Roughness (R _a ) during the machining of Hastelloy using Electrical Discharge Machining (EDM) machined under NaOH dielectric medium. Results showed that a 20% NaOH concentration optimizes MRR at 0.889 mm ^3 min ^−1 , while higher concentrations lead to process instability due to excessive bubble formation and discharge irregularities. The optimal current of 30 A improves MRR, but excessive melting occurs beyond this level, negatively impacting tool wear and surface finish. A pulse-on time of 45 μs produces the best surface finish of 1.786 μm), while longer pulse durations cause overheating and degrade surface quality. TWR was minimized at a gap distance of 2 mm, which allowed effective cooling and debris removal, reducing wear by 15%. Voltage levels between 12 V and 18 V resulted in the most stable discharges, yielding optimal MRR and Ra values. Lower current values stabilize TWR, while higher currents and longer pulse-on times increase wear. A gap distance of 2 mm minimizes TWR by ensuring effective cooling and debris removal. Optimal surface roughness is achieved with 30 A and 45 μs, where controlled discharges reduce surface imperfections. Higher NaOH concentrations induce rougher textures due to more aggressive sparks. SEM analysis confirms that process parameters significantly impact surface topography, characterized by craters, re-solidified debris, and microcracks. The optimized parameters identified from the results were 20% NaOH concentration, 30 A current, 45 μs pulse-on time, 2 mm gap distance, and voltage of 15 V.https://doi.org/10.1088/2053-1591/ad8ffdhybrid machiningECDMhastelloysurface topographymachining performance |
| spellingShingle | Kanulla Karthik Ranjith R Venkatrami Reddy Veduru Kawin Nallasivam Experimental investigation on electrochemical discharge machining of hastelloy Materials Research Express hybrid machining ECDM hastelloy surface topography machining performance |
| title | Experimental investigation on electrochemical discharge machining of hastelloy |
| title_full | Experimental investigation on electrochemical discharge machining of hastelloy |
| title_fullStr | Experimental investigation on electrochemical discharge machining of hastelloy |
| title_full_unstemmed | Experimental investigation on electrochemical discharge machining of hastelloy |
| title_short | Experimental investigation on electrochemical discharge machining of hastelloy |
| title_sort | experimental investigation on electrochemical discharge machining of hastelloy |
| topic | hybrid machining ECDM hastelloy surface topography machining performance |
| url | https://doi.org/10.1088/2053-1591/ad8ffd |
| work_keys_str_mv | AT kanullakarthik experimentalinvestigationonelectrochemicaldischargemachiningofhastelloy AT ranjithr experimentalinvestigationonelectrochemicaldischargemachiningofhastelloy AT venkatramireddyveduru experimentalinvestigationonelectrochemicaldischargemachiningofhastelloy AT kawinnallasivam experimentalinvestigationonelectrochemicaldischargemachiningofhastelloy |