4.4 Article

Analyzing micromachining errors in EDM of Inconel 600 using various biodegradable dielectrics

出版社

SPRINGER HEIDELBERG
DOI: 10.1007/s40430-022-03560-5

关键词

EDM; Overcut; Dimensional; Accuracy; Biodegradable; Dielectrics; Inconel; Canola; Amla; Olive; Sunflower; Coconut; Mustard

资金

  1. King Saud University [RSP-2021/256, 2021]

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The study evaluates the use of six different biodegradable dielectrics in electric discharge machining (EDM) of Inconel 600. Canola oil is found to be the most effective in reducing dimensional overcut, while the combination of sunflower oil and copper electrode also shows promising results. Compared to conventional kerosene oil, the biodegradable dielectrics can significantly reduce overcut.
Inconel 600 is a Ni-based superalloy having exclusive properties like high strength and stability in harsh conditions. However, its accurate machining is challenging via conventional cutting methodologies. As a result, the use of electric discharge machining is common in cutting Inconel 600 precisely. But the intrinsic issue of overcut associated with traditional EDM limits its appreciation in cutting Ni-based alloy. Moreover, conventional dielectric oil used in EDM releases hazardous fumes and gases that put the operator's health at risk. Therefore, in this study, six different biodegradable dielectrics have been investigated for their potential in controlling the dimensional overcut, which have yet to be evaluated thoroughly. The performance of biodegradable dielectrics (canola, amla, olive, sunflower, coconut, and mustard oil) against four types of electrode materials has been evaluated using full factorial design in the EDM of Inconel 600. Experimental findings are analyzed with statistical tests and optical/scanning electron microscopic evidence. The experimental results indicated that canola dielectric yield the smallest dimensional overcut. However, combination of sunflower oil and copper electrode proved as second premier case to reduce the overcut. Compared to the conventionally used kerosene oil, the biodegradable dielectrics (canola and sunflower) display a 63% and 1.2-folds reduction in overcut.

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