Experimental Study on Mechanical Characteristics of Aluminium Metal Matrix Composite Reinforced with Titanium Oxide (TiO2) and Graphite (Gr) Particles Processed by Stir Casting Method

Abstract

In recent trend Aluminium based metal matrix composites are most used in mechanical and automobile component design applications because of their excellent mechanical, Tribological and its physical properties. Also, Aluminium metal matrix composites are used for a variety of applications such as military, aerospace, electrical industries, and automotive purposes. The present work concentrates on the experimental study on the effects of TiO2 and Gr on aluminium alloy. During this investigation, Titanium oxide (TiO2) and Graphite (Gr) particles was reinforced with aluminium and it was prepared using stir casting technique with various weight percentage combinations of TiO2 particles 2% by wt., 4% by wt., and 6% by wt. and 3% of Gr constant for all trials. Mechanical parameters were estimated by selecting the standard test methods.

Introduction

I. INTRODUCTION

Composite materials possess good mechanical properties compared to monolithic materials. They are among the most widely used materials due to their adaptability to different situations and relative ease of combining with other materials to serve specific purposes and exhibit desirable properties. They have fabulous high strength, lightweight, chemical and corrosion resistance, and have a low thermal expansion coefficient. They are formed by combining 2 or more materials with quite different properties and do not dissolve or blend. The different materials in the composite work together and exhibit unique properties. In the present world, most of the experimental work on composite materials is focused on their applications in the sectors of aerospace, automobiles, helicopters, spacecraft, etc. Aluminium matrix composites (AMCs) have strong physical and mechanical qualities, making them potential materials for a variety of applications. In comparison to traditional engineering materials, the metallic matrix's stiffness, specific strength, wear, creep and fatigue properties are improved with the addition of reinforcements. By adding desirable single and multiple reinforcement particulates like SiC, Al2O3, Gr, TiO2, B4C, and fly ash as composites, the composite materials exhibit higher characteristics than the base alloy material.

Mohammad Faisal Ansari, [1] synthesized aluminium metal matrix composites (AMMCs) with different weight percentages of TiO2 particles by stir casting process. Aluminum-TiO2 composites reinforced with various weight percentages of (0, 5, 10 and 15 wt. %). The test results show that the mechanical behaviours of the fabricated composites are enhanced by increasing the Titanium dioxide content. The ultimate tensile strength and hardness of the produced composite enhanced with the addition of higher percentage of TiO2. Vijaykumar S Shet, [2] synthesized aluminium metal matrix composites (AMMCs) with different weight percentages of TiO2 particles by stir casting process. The extent of incorporation of TiO2 particles in the composite will be varied from 2-8 wt.% in steps of 2. Microstructure studies, wear properties, hardness of as cast Al 6063 alloy and Al 6063- TiO2 composites will be evaluated. TiO2 when used as reinforcement have owed to an increase in the micro hardness (VHN), wear resistance and Density of the composite

Siddhesha S, et al [3] in his study showed that the metal matrix composite is prepared with varying the (TiO2) volume fraction which ranges from 2% to 8%. Metal Matrix Composite is fabricated successfully through stir casting method. The experimental results show that the tensile strength, hardness and impact strength of Metal Matrix Composite are increasing with volume fraction of Titanium dioxide. Raghu S, et al [4]

Synthesized Titanium oxide nanoparticle reinforced with Al6061 metal matrix composite specimens by high pressure die casting technique by using bottom pouring stir casting technique. The Effect of various Nano Particle Sizes of TiO2 was evaluated. The Brinell hardness and ultimate tensile strength of the Nano-composites increases with increase in Nano TiO2 particles.

II. SELECTIONS OF MATERIALS

The matrix material in present study is pure Aluminium, and the reinforcing material selected is Titanium dioxide (TiO2) and Graphite (Gr) of different composition. The Titanium dioxide is varied by 0%, 2%, 4% and 6% weight of Aluminium and 3%Gr. 

Some of the attractive property combinations of Al based matrix composites are: high specific stiffness, strength, thermal conductivity, and low thermal expansion. TiO2 (rutile) is a soft powder. The reinforced particles size of TiO2 is 44 microns. The material properties of the Al and titanium dioxide (rutile) are shown in table 2.1.

Conclusion

The Aluminium-TiO2 and graphite (Gr) metal matrix composite is prepared by stir casting method by varying the amount of TiO2 and graphite (Gr) particles. The different experiments are carried out on the fabricated aluminium TiO2 metal matrix composite as per ASTM standard. Composites reinforced with Al +6% TiO2 +3% Gr exhibits good hardness behaviour as compared to other percentage with the increase in composition of Al +6% TiO2 +3% Gr reinforced with aluminium were successfully fabricated. The TiO2 Particles distribution with Aluminium is confirmed by SEM images. Consequently, the ultimate tensile strength of the composite is recommended for the Al +6% TiO2 +3% Gr reinforced material. Finally, from all the experiment reveals that by increase of material properties of Aluminium alloy by adding the reinforcement up to certain level.

References

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Copyright

Copyright © 2024 Anusha G, Mohan Kumar K S, Giriyanna T. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.