Stagnation Phenomenon of Spark in the PMEDM Medium: A Review

Abstract

New electrically conductive materials with desirable mechanical qualities and thermal characteristics have become available thanks to developments in materials science. It is difficult to machine these materials with standard machining techniques. In order to produce hard materials with geometrically complex geometries, a well-established machining technology called electrical discharge machining (EDM) is utilised. Electrical discharge machining (EDM) is a thermo-electric method that erodes material by repeated sparks between an electrode and a workpiece that are not in touch. Due to the lack of physical contact between the electrodes in EDM, typical machining flaws such as mechanical strains, clattering, and vibration are avoided. Despite its benefits, the method has found little application in industry due to its unsatisfactory surface polish and low volumetric material removal. Mixing the metallic powder in the dielectric fluid improves its conductive strength and extends the spark gap between the tool and the workpiece, mitigating these shortcomings. Powder Mixed Electrical Discharge Machining is the name of the cutting technique that has recently evolved (PMEDM). The EDM process's efficiency is drastically altered by the additional powder. The purpose of this review is to help researchers better grasp the PMEDM idea, and to analyse the process parameters in more depth for the purpose of making improvements to the process and so achieving higher quality levels.