Machinability of Metal Matrix Composites using Wire Electric Discharge Machining: A Review

Abstract

Metal Matrix composites [MMCs] are increasingly being applied in the automotive and aerospace industries as high-performance substitutes for traditional materials. Due to these properties, namely, high strength-to-weight ratio, outstanding fracture toughness, and low density, a vast array of uses is feasible. We can control the properties of MMCs directionally as well, which makes them the perfect choice for military uses and marine and sports equipment. The machining of MMCs plays a crucial role in producing various parts and components. Although conventional machining of metals and alloys is widely practised in aerospace, biomedical, and automotive applications, MMCs are different due to the properties of metal matrix and reinforced materials. However, there are issues with the conventional way of processing, namely hardening, tool wear, thermal stresses and inconsistent surface roughness. In this article, the author focuses on the topic of machining of MMCs Wire Electric discharge machining, a popular variant of electric discharge machining methods. It starts with the description of MMCs, the reasoning for their application, and the challenges in the machining process. It then discusses previous studies on the machining of MMCs using advanced methods of wire electrical discharge machining. The article also covers productivity and surface integrity problems like delamination and surface roughness while looking at the opportunities and threats of these new-age processes.

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References

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