International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 08 | Aug 2025
p-ISSN: 2395-0072
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Study and Analysis on Mechanical Properties of Aluminium alloy 7075 reinforced with Titanium dioxide and Egg shell D. Jayakumar1, D. Krishnadas2, Dr. C. Subramanian3 1 , 2UG Scholar, Department of Mechanical Engineering, Christ College of Engineering and Technology, Puducherry-
605 010 Professor and Head, Department of Mechanical Engineering, Christ College of Engineering and Technology, Puducherry-605 010 ---------------------------------------------------------------------***--------------------------------------------------------------------3
Abstract - Aluminium alloy 7075 is a metal matrix
types, it still performs better than the 2000 series in resisting corrosion.
composite which has used in the aerospace and defense industries, due to high strength and corrosion resistant. Aluminium alloy 7075 was selected as the base matrix and reinforced with Titanium dioxide and egg shell to form a hybrid composite. TiO2 was used to improve hardness, while egg shell powder, a bio-waste material rich in calcium carbonate, was added to enhance stiffness and sustainability. In this present work, we have performed two specimens. The first specimen comprised 90% Al7075, 6% TiO2 and 4% Egg shell, while the second consisted 90% Al7075, 8% TiO2 and 2% Egg shell particles. Stir casting method is adopted because, this is the best method to make composite mixture in the molten stage of metal to get the proper mixture of composite. This specimens were subjected to Mechanical tests such as Micro Vickers Hardness test and Compression test, Scanning Electron Microscope test were conducted to study change in structure.
1.2 Titanium dioxide Titanium dioxide is chemically inert, non-toxic, thermally stable and low cost, making it an ideal reinforcement material in metal matrix composites. When added to aluminium matrix composites (AMCs), TiO2 enhances mechanical properties such as hardness, tensile strength, wear resistance and fracture toughness. It is commonly used in various application from pigment in paints to bone implants. The addition of TiO2 into aluminium matrix composites (AMCs) can lead to:
Key Words: Aluminium alloy 7075, Titanium dioxide, Egg shell, Stir casting, Micro Vickers Hardness test, Compression and SEM test.
Increased strength Enhance fracture toughness Enhance wear resistance Improve thermal stability Better corrosion resistance.
1.3 Egg shell
1.INTRODUCTION 1.1 Aluminium alloy 7075 The aluminium is a chemical element with symbol Al and atomic 13. Aluminium appears as a soft, silvery-white metal that is lightweight and non-magnetic belonging to the boron group in the periodic table. It is the third most abundant element in the Earth’s and is primarily extracted from bauxite ore. One of the most important properties of aluminium is its low density which makes it highly desirable in industries where weight reduction is critical, such as aerospace, automotive and transportation. The aluminium have many series like (1xxx, 2xxx,3xxx……,7xxx). Aluminium 7075 alloy is a high - strength aluminium alloy primarily alloyed with zinc, along with magnesium and copper, making it significantly stronger than many other aluminium alloys and comparable in strength to some steels. Al7075 is significantly stronger than Al6061 or Al 6065 alloys. It is nearly twice as strong in tensile and yield strength. Though aluminium alloy 7075 is not as corrosion-resistance as some other aluminium
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Figure 1 Wasted Egg Shell In India, the poultry industry plays a significant role in agriculture, contributing to egg production with an annual growth rate of approximately 6% with a hen population of 489 million. India produces around 47 billion eggs annually, making it the third-largest egg producing country globally[1]. This results in the generation of a large amount of egg shell waste. It is a naturally occurring bio-waste
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