Abstract
The development of new materials show the immense growth but the major problem, it is very difficult to machine the newly developed materials. So it is necessary to adopt some new machining methods. Electrical Discharge Machining (EDM) is a non-traditional and most popular machining method to manufacture dies, punches and press tools because of its capability to produce complicated, intricate shapes and to machine hard materials. From the industrial point of view, metal matrix composite is one of the main topics studied in the last 15 years. Having studied so long, this material is very suitable for use in several engineering applications, particularly in the automotive and aerospace (1). The particle reinforced aluminium nitric MMC 10% is getting the attention of researchers because it has good properties in terms of high strength to weight ratio, high strength, high impact strength. During experimentation, current and pulse duration were taken as variables for the study of surface roughness and material removal rate. Cooper electrode is used with kerosene as a dielectric fluid in the experiment. Using Taguchi method, L9 orthogonal array has been chosen and three levels corresponding to each of the variables are taken. Experiments have been performed as per the set of experiments designed in the orthogonal array. Results of experimentation were analyzed analytically as well as graphically. Signal to Noise ratio was calculated to analyze the effect of input parameter more accurately. The optimal value of Surface Roughness (SR) and Material Removal Rate (MRR) were also calculated using their signal to noise ratio value. From the experimental results, it is clear that the cooper electrode with lowest current value (2amp) and pulse duration (4μs) has better surface finish while highest current value (7amp) and pulse duration (8μs) possess highest MRR.
Highlights
A composite material is a material consisting of two or more physically and/or chemically distinct phases [2]
Continuous fibers typically provide the highest degree of load transfer, because of their very high aspect ratio, which results in a significant amount of strengthening along the fiber direction
Many researchers used other materials for their experimentation like aluminium, steel, and many more on Electrical Discharge Machining (EDM) but still no work is done on metal matrix composite (MMC) of AISi/10% AIN which is one of the most commonly used in several engineering applications, in the automotive and aerospace
Summary
A composite material is a material consisting of two or more physically and/or chemically distinct phases [2]. Particle or short fiber reinforced metals have a much lower aspect ratio, so they exhibit lower strengths than their continuous fiber counterparts, the properties of these composites are much more isotropic. The size, shape and distribution of the discontinuous components; the degree of bonding between them and the orientation of the various components, MMC have become a large leading material in composite materials, and particle reinforced aluminium. MMCs have received considerable attention due to their excellent engineering properties These materials are known as the difficult-to-machine materials, because of the hardness and abrasive nature of reinforcement element like silicon carbide (SiC) particles. The possibility of combining various material systems (metal – ceramic – non-metal) gives the opportunity for unlimited variation The properties of these new materials are basically determined by the properties of their single components
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