![]() ![]() In this technology, electrical sparks are used for material abrasion, so there are no mechanical stresses or tipping and vibration problems during processing as the electrode and workpiece do not touch each other. With EDM, chip removal is achieved by melting and evaporating the workpiece. On the other hand, the melting temperature and thermal conductivity of the material affect the machinability performance. The machining performance has no effect on the stiffness, toughness and strength of the material to be machined. This method is classified as a thermal machinability method because it uses electricity as energy. ![]() Įlectrical discharge machining is an unusual manufacturing method used to machine geometrically complex and rigid materials. Cryogenic treatment applied to different materials improves their hardness, toughness, electrical conductivity and abrasion resistance properties. The use of deep or shallow cryogenic treatment depends on the type of material to be treated. Shallow cryogenic treatment is performed between −80 ☌ and −140 ☌, and deep cryogenic treatment between −140 ☌ and −196 ☌. Cryogenic treatment is usually carried out at temperatures between −80 ☌ and −196 ☌. During cryogenic treatment, the samples are gradually brought to a cryogenic temperature, kept at that specified temperature for a certain period of time, and then brought back gradually to room temperature in order to prevent microfractures from forming in the microstructure of the material. Cryogenic treatment is applied to a wide range of materials, such as iron, non-ferrous alloys, ceramics, plastics, carbides and tool steels, as well as to cutting tools. When examined in terms of Taguchi-gray relational degrees, the optimal parameters for both Ra and MRR were observed in the experiment performed with the SCT sample at a peak current of 6 A and 300 μs pulse-on time.Ĭryogenic treatment is a type of heat treatment applied at low temperatures that is used to improve the mechanical and physical properties of materials. According to the ANOVA results for determining parameters affecting performance, peak current was the most effective factor for average surface roughness and MRR, at 74.79% and 86.43%, respectively. The response table obtained using the Taguchi method showed the most effective factors as A 1B lC 3 for Ra and A 2B 2C 1 for MRR values. According to the Taguchi-based gray relational analysis, the optimal parameters for both Ra and MRR were determined as cryogenic treatment, pulse-on time and peak current, respectively. The resulting average surface roughness (Ra) and material removal rate (MRR) results were optimized using the Taguchi L 18 method. Experimental parameters, including pulse-on time (300, 400 and 500 μs), peak current (A) (6 and 10 A) and material types (untreated and treated with SCT and DCT), were used to construct the full factorial experimental design. In this study, machinability tests were carried out on a corrosion-resistant superalloy subjected to shallow (SCT) and deep cryogenic treatment (DCT) via electrical discharge machining (EDM), and the effect of the cryogenic treatment types applied to the material on the EDM processing performance was investigated.
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