Effect of Silica Rich CRT on Thrust Force, Temperature and Surface Finish in Drilling Magnesium Hybrid MMC
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ORIGINAL PAPER
Effect of Silica Rich CRT on Thrust Force, Temperature and Surface Finish in Drilling Magnesium Hybrid MMC Gopal P.M. 1
&
Soorya Prakash K. 2 & Ramesh Kumar S. 2
Received: 6 May 2020 / Accepted: 1 October 2020 # Springer Nature B.V. 2020
Abstract The current study focuses on developing Mg/CRT/BN hybrid composite and optimization of reinforcement and drilling parameters for better surface finish, reduced thrust force and temperature while drilling the composite. The specimens are produced through powder metallurgy method by incorporating silica rich cathode ray tube (CRT) panel glass powder having rich silica content and boron nitride. Along with CRT particle size (10, 30 and 50 μm) and proportions (5, 10, 15 wt.%), machining parameters namely cutting speed, feed rate and diameter of the tool were considered for optimization. The results reveal that the surface roughness, thrust force and temperature in drilling rose with raise in reinforcement size and weight %. Analysis of Variance (ANOVA) results indicate that every one of the input constraints have considerably affected the response variables. The regression model formed possesses enough capability to predict the output variables that too with minimal error. The optimum parameter combination for multi quality characteristics predicted by GRA gives better results. Keywords Magnesium . Drilling . Cutting force . Temperature . Surface roughness . GRA
1 Introduction Industries have vast interest on magnesium and its alloys among the explored light weight metals mainly for the reason of lower density of these materials ranging from 1.75 to 1.85 g/cm3 which is almost 30% lower when compared to aluminium alloys. Generally, magnesium and its alloys possess high thermal and electrical conductivity, good vibration and shock absorption capability [1–4]. The foremost negative aspects of these materials are their poor ability to resist wear and corrosion besides inferior room and elevated temperature strength. Through the addition of reinforcements, it is possible to provide the magnesium materials as per the application necessity with elevated specific strength, stiffness, dimensional stability, damping capability and creep performance. From the available literatures, it is a know how that the consumption of Mg is mounting persistently and this increment is * Gopal P.M. [email protected] 1
Karpagam Academy of Higher Education, Coimbatore, Tamil Nadu 641021, India
2
Anna University Regional Campus Coimbatore, Coimbatore, Tamil Nadu 641046, India
anticipated to continue in a better pace for the near future too [5]. Although these reinforced materials called as metal matrix composites (MMC) have improved properties, the complexity in machining of these newer materials is one central issue that foils the appreciation for MMCs in industry [6]. Further the machining of magnesium is itself not simple as that of aluminium and modern applications like aerospace require components with high-quality surface finish. Even though, machining of magnesium alloy
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