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In the present study, AA7075/TiB 2  aluminium metal matrix composite (AMCs) was prepared by stir casting method using in-situ reactions of inorganic salts KBF 4  and K 2 TiF 6 . In this process AA7075 alloy is reinforced with different weighted percentages of (5 %wt, 10 %wt, and 15 %wt) Titanium Diboride (TiB 2 ) particles. X-ray Diffraction (XRD) investigation reveals the presence of TiB 2  particles without any formation of the intermediate phase. An optical microscope was used to examine the microstructure, which revealed that the TiB 2  particles are equally distributed and that grain size reduces as the weighted percentage of reinforcement particles increases. When the weighted percentage of TiB 2  reinforcement particles increased, the microhardness and ultimate tensile strength of the AA7075/TiB 2  AMCs increased. Furthermore, the ductile mode of failure of the tensile specimen has been observed by fractography analysis.

Microstructure and mechanical characteristics of an in-situ synthesis of AA7075/TiB2 metal matrix composite