Abstract
Metal matrix composite is considered in various engineering fields like Automobile, medical, electronics aerospace, marine, recreational sectors, of which Aluminum metal matrix composite is considered mostly because of its high strength to weight ratio, easy of fabrication, corrosion resistance, good aesthetic appearance and high resistance to wear etc. This paper concentrates on the effect of secondary processing (Cold Extrusion) on mechanical and wear properties of Al6063 reinforced with SiC, Al2O3 and CeO2 particles. Here composite systems prepared by varying reinforcement from 0% to 8% in steps of 2%. Stir casting route adopted for casting composite systems after casting the composite is made to pass through extrusion process with an extrusion ratio of 1.93 with a total strain of 1.45. All composite systems tested for mechanical properties as per ASTM and ISO standard. Wear test was conducted on pin on disc setup for different loads, reinforcement, sliding distance and sliding speed. Results reveals that due increase in reinforcement the mechanical properties have improved further improvement observed when subjected to extrusion process, similar observation was made for wear studies which conclude the wear rate is improved for extruded composite as compared to cast composite systems observed by various researchers.
Highlights
Metal matrix composite have replaced many conventional materials due to its superior properties light weight with good resistance to corrosion and wear, due to these properties this materials are widely accepted in many engineering sectors like Marnie, Aerospace, Electrical, Automobile etc
Particulate reinforced metal matrix composite has widely accepted in last few decades, addition of ceramic particles in aluminum alloy has significantly improved mechanical and wear properties., the major problem associated with fabrication of metal matrix reinforcing with ceramic particles was poor wettability due to which agglomeration of reinforcement formed, the issue overcome with the development of different production techniques optimizing the different production technique helps to fulfill the industry requirement at larger extent[18]
A lot of work on primary processed composite done with various combination researcher are focused on secondary processing of primary processed composite, it has found larger difference in hardness was observed at the surface compared to the core area due to severe deformation that occurred at the dead metal zone surface during extrusion
Summary
Metal matrix composite have replaced many conventional materials due to its superior properties light weight with good resistance to corrosion and wear, due to these properties this materials are widely accepted in many engineering sectors like Marnie, Aerospace, Electrical, Automobile etc. Researchers identified number of reinforcement for aluminum based metal matrix composite like TiB2, SiC, TiO2, Al2O3,TiC, Gr to improve the properties of composite [4,6,7].It is found that with reinforcing the fly ash with 5% and 10% by weight in Al6063 Hardness, Tensile and wear properties have improved [2]. The present work aims to study the effect of secondary process (Cold extrusion) on mechanical and wear properties for aluminum matrix reinforced with SiC, Al2O3 and CeO2 particles of varying weight percentage from 0% to 8% instep of 2%
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