Investigation of Microstructural, Mechanical and Corrosion Properties of AA7010-TiB₂ in-situ Metal Matrix Composite

Abstract

Aluminum alloys with ceramic reinforced particulates are made prospective in aerospace, transportation, and industrial applications ampler to their low mass density, stiffness, and high specific strength. In this work, Aluminium Alloy(AA) 7010 - TiB2 (Titanium Diboride) composites with different amounts of reinforcement (5, 7.5 and 10 wt.%) were produced by the exothermic reaction of halide salts K2TiF6 and KBF4 added in 120% excess to the stoichiometric ratio with molten AA7010.The effect and dispersion of TiB2 particulates in AA7010 were analyzed by microstructural, mechanical and corrosion behavior. The dispersion of reinforcement in the matrix alloy was analyzed by optical microscope and field emission scanning electron microscope (FESEM) images. X-ray diffraction patterns of the prepared composites reveal the formation of TiB2 particles in the matrix alloy. Indeed samples are tested according to ASTM G34 standard for ex- foliation corrosion rate by weight loss method. The result shows improved hardness, tensile strength and yield strength of composites to about 35%, 260%, and 240% respectively. The mechanical and corrosion resistance of 10% TiB2 shows better results compared with matrix alloy and other concentrations of reinforcements.

Corrosion behavior of Al/TiO2/Y2O3hybrid nanocomposites manufactured using the vacuum-assisted stir casting route

“…It was also shown by increasing the period of solution-sample contact, AMCs with different Wt.% TiO 2 and Y 2 O 3 resulted in significant corrosion resistance (Alaneme, 2011). The corrosion resistance improved when the corrosion rate lowered, according to Mallireddy and Siva (2020).…”

Optimum Processing of Absorbable Carbon Nanofiber Reinforced Mg–Zn Composites Based on Two-Level Factorial Design

“…The presence of CNF particles could help in slowing down the dissolution of the Mg matrix in PBS by increasing the interfacial bonding with the Mg matrix as they are chemically stable in any solution except a powerful oxidizing agent [14]. Similarly, the interfacial effect was observed on a composite of TiB 2 and aluminium alloy-7010 where the corrosion resistance of composite was 10% higher than the alloy alone [47]. The effect of a strong interfacial bond between aluminium matrix and multi-wall CNF particle in reducing corrosion rate was also reported by Samuel Ratna Kumar et al as the result of minimal active surface area due to an increase in the percentage of CNF [48].…”

A Review on Distribution of Reinforcement and tensile Strength of Aluminum Lithium Alloy based Nano Metal Matrix Composites Fabricated by STIR Casting

“…There were observable increase ratios of 32.69, 29.51, and 35.71 percent. [46] evaluated that the exothermic reaction of molten AA7010 with halide salts K2TiF6 and KBF4 injected in 120% excesses to the stoichiometric ratio resulted in the production of AA7010-TiB2 composites with reinforcing levels of 5, 7.5, and 10 wt%. Optical micrographs show that the in-situ stir casting technique is effective for producing ceramic-reinforced MMC with uniform particle dispersion and little permeability.…”