Abstract
In the present study, AA7075/TiB2 aluminium metal matrix composite (AMCs) was prepared by stir casting method using in-situ reactions of inorganic salts KBF4 and K2TiF6. In this process AA7075 alloy is reinforced with different weighted percentages of (5 %wt, 10 %wt, and 15 %wt) Titanium Diboride (TiB2) particles. X-ray Diffraction (XRD) investigation reveals the presence of TiB2 particles without any formation of the intermediate phase. An optical microscope was used to examine the microstructure, which revealed that the TiB2 particles are equally distributed and that grain size reduces as the weighted percentage of reinforcement particles increases. When the weighted percentage of TiB2 reinforcement particles increased, the microhardness and ultimate tensile strength of the AA7075/TiB2 AMCs increased. Furthermore, the ductile mode of failure of the tensile specimen has been observed by fractography analysis.
Highlights
IntroductionMetal matrix composites (MMCs) are composites made up of metallic matrix (copper, magnesium, cobalt, iron, and aluminium) and a scattered phase
Metal matrix composites (MMCs) are composites made up of metallic matrix and a scattered phase
The primary benefits of aluminium-based MMCs materials are extraordinary strength, controlled thermal coefficient, wear resistance, improved stiffness and improved abrasion, and enhanced damping capabilities. [1,2,3] Aluminium-based metal matrix composites are the composites where Al is used as matrix, and the other components are inserted into the matrix, which is known as reinforcement, for example, (TiB2, SiC, Al2O3, C, B4C,)
Summary
Metal matrix composites (MMCs) are composites made up of metallic matrix (copper, magnesium, cobalt, iron, and aluminium) and a scattered phase. The primary benefits of aluminium-based MMCs materials are extraordinary strength, controlled thermal coefficient, wear resistance, improved stiffness and improved abrasion, and enhanced damping capabilities. Al-based MMCs are broadly utilized in automobiles and Aerospace applications. It is because of its properties like high strength, improved thermal properties, and improved durability [8]. Aluminiumbased MMCs are considered to synthesize monolithic material, including titanium alloys, aluminium alloys, polymer composites and ferrous alloys in numerous applications. In this investigation, stir casting was chosen over other processes like powder metallurgy, foil diffusion bonding, stir casting, and physical vapour deposition
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