Wire Discharge Machining (EDM) is a non-traditional machining process in which a pulsed voltage difference between a wire electrode and a conductive workpiece initiates sparks that erode the material of the piece. Removing material in this way is often advantageous when the workpiece material would be difficult to machine with traditional machine tools due to high strength, hardness, toughness, etc. (Newton, 2008). Due to the process itself, EDM can produce any complex shape, but with the loss of surface integrity and other side effects such as width of cut, heat affected zone and so on. However, selecting cutting parameters to achieve higher cutting efficiency or precision in WEDM is still not fully solved, even with the most up-to-date WEDM CNC machine. This is due to the difficult to expect nature of the wire EDM process. As a result, the relationships between cutting parameters and process performance are difficult to model accurately. Problems arise even if the machine itself is very up to date and some people hardly do a search for it. Nowadays, the application requires a material that has the best properties in terms of resistance, corrosion and other properties. The composition of the material is then made according to the specific properties required. However, the properties also have disadvantages on the process to choose to produce the material, therefore the composition of the material should be studied first before making any decisions. The ease and economy with which INCONEL 718 alloy can be manufactured, combined with good tensile, fatigue, creep and fracture strength, have led to its use in a wide range of applications. The application examples using Inconel 718 as the main...... CHAPTER 2 Literature Review2.1 Introduction2.1.1 Wire EDMThe electric discharge machine (EDM) is mainly used to cut a very complex shape which other machines do not they can do. Somehow, it is only usable on metal-based products since electricity is the main source for cutting the product. The process of cutting metal product is very complicated as many factors need to be considered to get a perfect finish product. The basic process of EDM involves a spark being generated between two electrodes which are the tool and the workpiece. The spark will occur in the narrowest gap between the two electrodes. The sparks generated are very high and the cycle time for each spark is very short. Due to the high temperature of the spark, the spark area melts in an instant and vaporizes. The residue is then removed by the dielectric fluid contained within the processing area.