Abstract
Problem statement: Metal Matrix Composites (MMC) have become a leading material among composite materials and in particular, particle reinforced aluminum 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 Alumina (Al2O3). Approach: In this study, an attempt has been made to model the machinability evaluation through the response surface methodology in machining of homogenized 10% micron Al2O3 LM25 Al MMC manufactured through stir casting method. Results: The combined effects of three machining parameters including cutting speed (s), feed rate (f) and depth of cut (d) on the basis of three performance characteristics of tool wear (VB), surface Roughness (Ra) and cutting Force (Fz) were investigated. The contour plots were generated to study the effect of process parameters as well as their interactions. Conclusion: The process parameters are optimized using desirability-based approach response surface methodology.
Highlights
Metal Matrix Composites (MMC) is widely used composite materials in aerospace, automotive, electronics and medical industries
The results indicated that Polycrystalline Diamond (PCD) insert tools have longer tool life and better surface roughness and found CVD diamond coated tools show short life, as tool wear evolution becomes very fast after coating rupture (Davim, 2002)
Work material: LM25 aluminium alloy metal matrix composite material is used as the work material in the
Summary
Metal Matrix Composites (MMC) is widely used composite materials in aerospace, automotive, electronics and medical industries. They have outstanding properties like high strength, low weight, high modules, low ductility, high wear resistance, high thermal conductivity and low thermal expansion. These desired properties are mainly manipulated by the matrix, the reinforcement element and the interface. The most popular reinforcements are Silicon Carbide (SiC) and Alumina (Al2O3). Titanium and magnesium alloys are commonly used as the matrix phase. The density of most of the MMCs is approximately one third that of steel, resulting in high-specific strength and stiffness
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