International Journal of Engineering Research

S. P. Saikeerthi ¹, B. Vijayaramnath ¹, C. Elanchezhian ¹

Affiliations
1 Department of Mechanical Engineerng, Sri Sairam Engineering College, Chennai-44, IN

Abstract

Metal matrix composite (MMC) focuses primarily on improved specific strength, high temperature and wear resistance application. From the collected literature it is found that, metal matrix composites are under serious consideration as potential candidate materials and it is mainly used to replace conventional materials in aerospace and automotive applications. So, the MMC are highly used in automotive and space applications. And the Aluminium Matrix Composite is a material with two constituent parts, one being a metal, and other being reinforcement. The aluminium matrix can be strengthened by reinforcing with hard ceramic particles like SiC, Al₂O₃, B₄C etc. In this project, aluminium 6061 alloy is chosen as one of constituent parts, which has good mechanical properties and exhibits good weldability. The mechanical properties like tensile strength and Hardness can be increased by reinforcing 6061Al matrix with Boron Carbide (B₄C) and Silicon carbide (SiC) particles. In this project, the fabrication of aluminium 6061 with boron carbide and aluminium 6061 with silicon carbide is done by stir casting process, which is a liquid state material fabrication and cost effective method. Then, the samples are tested for mechanical properties like tensile, hardness, impact, flexural. Finally the Scanning Electron Microscope (SEM) analysis is done, which helps to study topography of composites and it produces images of a sample by scanning it with a focused beam of electrons.

Keywords

Metal Matrix Composite, Aluminium 6061, Boron Carbide, Silicon Carbide, StirCasting.

Full Text

   

K. Praveen Kumar ¹, C. Elanchezhian ¹, B. Vijayaramnath

Affiliations
1 Department of Mechanical Engineering, Sri Sairam Engineering College, Chennai, IN

Abstract

The main objective of this investigation was to evaluate physical, mechanical, morphological and water absorption properties of polypropylene filled with wood flour as filler. New materials based on wood have the advantage that their properties can be engineered so as to correspond to user demands. The properties which can be engineered are those relating both to their utilisation and machining, in particular - the tensile strength, elongation at break, modulus of elasticity and impact resistance. The composites with different wood flour content (10%, 15% and 20%) and polypropylene (PP) were mixed by twin screw extruder and then the composites were manufactured by injection moulding method. Based on the findings in this work, the water absorption and thickness swelling of the composites increased with increasing with amount of the wood flour. Furthermore, both flexural and tensile modulus increased, while both flexural and tensile strength decreased with increasing wood flour contents. Morphological examination is carried out on the fractured surfaces by scanning electron microscopy (SEM), in order to investigate the variation of the measured mechanical properties, revealed presence of micro voids resulting from weak filler-matrix interfacial adhesion.

Keywords

Polypropylene, Wood Flour, Mechanical Property, Scanning Electron Microscope, Water Absorption.

Full Text

   

P. Krishnakumar ¹, B. Vijayaramanath ², C. Elanchezhian ²

Affiliations
1 Sri Sairam Engineering College, West-Tambaram, Chennai, 600044, IN
2 Department of Mechanical Engineering, Sri Sairam Engineering College, West-Tambaram, Chennai, Tamil Nadu, 600044, IN

Abstract

The Composite materials have found widespread applications in various fields of engineering such as aerospace, marine, automobile and mechanical applications. Polypropylene is most widely used polymer matrix composite (PMC) due to its unique strength and hardness. In sports application like golf shaft which is subjected to various deflection and torsion loads so that ordinary steel golf shaft is replaced to polypropylene plastics which may help the player for more comfort due to its weight reduction. The Composite structure of golf shaft made of polypropylene plastics is modeled and mechanical behavior is experimentally calculated. Experimentally deflection is measured by hanging a mass on the tip with the butt fixed. The degree of torsion is measured by applying the twisting moment, to the tip. The frequency of vibration is measured by adding a mass to the tip of a shaft and shaking it.Finite element results for deflection and torsion give satisfactory results with the experimental data. These results will be useful in designing polypropylene and sheet rolled golf shaft.

Keywords

Nano Composites, Polypropylene, Calcium Carbonate, Scanning Electronic Microscope, Wear.

Full Text

   

N. Arun Kumar ¹, C. Elanchezhian ², B. Vijaya Ramnath ²

Affiliations
1 Sri Sairam Engineering College, West -Tambaram, Chennai, 44, IN
2 Department of Mechanical Engineering, Sri Sairam Engineering College, West-Tambaram Chennai, Tamil Nadu, 600044, IN

Abstract

Friction stir welding (FSW) is a new innovative solid state joining technique for joining similar and dissimilar metal which has been used in aerospace, rail, automotive and marine industries. This paper to optimized the effect of the tool shape and welding parameter on 6.35mm thick 7075- T651 aluminium plates. The process parameters are optimized by using the ANOVA technique based on L₉ orthogonal array. Experiments have been conducted based on three process parameters, namely, the tool rotation rate (rpm), welding speed and axial force at three different levels. Impact Strength has been predicted for the optimum welding parameters and their percentage of contribution in producing a better joint is calculated, by applying the effect of the signal-to-noise ratio and analysis of variance. The results indicate that the rotation rate (rpm), welding speed and axial force are the significant parameters in deciding the Impact Strength of the joint.

Keywords

Aluminium Alloy, Friction Stir Welding, Tensile Strength, Impact Strength, Analysis of Variance, Signal-to-Noise Ratio.

Full Text