Abstract
Abstract Electrical discharge machining (EDM) process is established as an important non-conventional machining method because of its capability to machine very difficult-to-machine (DTM) materials like alloys, composites, die steels etc. Despite the numerous advantages, process has some limitations such as this process consumes huge amount of energy, slow material removal rate, hazardous emissions, generation of toxic dielectric and slurry which make this process an unsuitable and hazardous process. Due to these reasons it is also considered harmful for machine operator and environmental conditions. Whereas, due to increased environmental government regulations (ISO 14000 standards), the cost of manufacturing is getting increased. Therefore, it has become necessary to make the machining process very capable and safe so that both the aspects get managed. This motivates the authors to undertake critical literature scrutiny of recent hybrid integrations with EDM process to perform a safe machining of DTM materials. Also, the work performed in making the process green is reviewed. Authors, concluded that despite, the huge advancement happens in EDM hybridization like powder-mixed EDM, dry EDM, tap water EDM, vibration assisted tool or workpiece etc., still advancement is required in process mechanism which provides high machining efficiency and minimal environmental health hazards.
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