A Systematic Review on the Mechanical, Tribological, and Corrosion Properties of Al 7075 Metal Matrix Composites Fabricated through Stir Casting Process

Abstract

Aluminium alloy components are used in lightweight engineering applications and lack mechanical properties, wear resistance, and corrosion resistance. When hard reinforcement particulates are dispersed in the aluminium matrix alloy, aluminium matrix composites (AMCs) are formed. This new material exhibits enhanced properties such as better specific stiffness, specific strength, corrosion resistance, elastic modulus, wear resistance, and lightweight. AMCs have many favorable properties compared to their alloy and extensive applications. Especially, in the space industry, where weight reduction and an increase in modulus are prevalent, the strength-to-weight ratio is more important. This study focuses on the tribological, mechanical, and corrosion properties of Al 7075 metal matrix composites (MMCs) reinforced with one or more particulates such as aluminium oxide (Al2O3), boron carbide (B4C), titanium carbide (TiC), silicon carbide (SiC), titanium dioxide (TiO2), and titanium diboride (TiB2). In AMCs, the reinforcements are incorporated by either the solid or liquid metallurgy route. The study addresses the findings and shortcomings in the preparation of MMCs with reinforcements and their improvement in corrosion resistance, wear resistance, mechanical properties, and lower coefficient of thermal expansion than the Al 7075 base alloy. A comprehensive survey of reinforcement particulates in MMCs and their influences are outlined from the literature, encompassing recent research trends to enhance the structural properties.

Influence of aging process and reinforcement ratio on physical and mechanical properties of carbonized aramid reinforced Al7075 materials

“…However, it was noted that there was a threshold ratio beyond which the tensile strength starts to decline. 26 Sambathkumar et al 27 emphasized that an increased amount of reinforcement in the Al matrix lead to a better transmission of stress from the matrix to the reinforcement, consequently enhancing the material’s fracture resistance. On the other hand, Yadav et al 28 highlighted that exceeding a certain proportion of reinforcement could lead to a decrease in intermolecular bonding between the reinforcement and matrix.…”

Effects of Er2(SO4)3 doping on characteristics of MAO coating

“…Titanium alloys have gradually gained popularity and applications in the sector of oil and gas development for their superior comprehensive performance. 1,2 However, due to the titanium alloy's poor wear resistance, the surface oxide film is easy to break under the action of sand and gravel scouring and lose the ability to protect, so it is prone to corrosion failure in high temperature, high pressure and oil and gas wells enriched with corrosive media, such as Cl − , CO 2 , and H 2 S. Therefore, to increase the titanium alloy's ability to resist corrosion and surface wear is crucial for expanding its use in oil and gas well environment. 3,4 There are methods of treatment that can increase the wear and corrosion resistance of titanium surfaces, involving plasma spraying, 5 vapor deposition, 6 and microarc oxidation 7 techniques.…”

Enhanced mechanical and tribological properties of ultrasonically assisted stir-cast AA7075 metal matrix composites in challenging corrosive environments

“…Its main constituents are zinc and aluminum, with trace amounts of additional metals [1,2]. The High-strength aluminum alloy AA7075 has many benefits, besides it has significant disadvantages and restrictions such as limited weldability, Stress Corrosion Cracking (SCC), defined formability, moderate tribological properties, brittleness, potential for galvanic corrosion and complex heat treatment [3][4][5]. The necessity for AMCs stems from the desire to develop materials with a variety of characteristics that cannot be obtained by relying solely on the metal matrix.…”