The main motto of this research is to investigate the tensile property of AA7178 reinforced with 5% fly ash and 5% nano zirconium oxide (ZrO₂) hybrid composites fabricated by a novel encapsulate technique and comparison with as cast AA7178 alloy. The samples for both groups were prepared using a novel encapsulation technique employing the stir-casting method. While preparing group 2 samples, a hybrid composite of fly ash (5%), nano ZrO₂ (5%), and AA7178 was used to prepare metal matrix composite, whereas AA7178 as-cast was used for group 1. The samples were made per ASTM E92 standards, and their tensile strength was measured using a universal testing machine (UTM-Auto instrument). Each group with 20 samples was fabricated. The G-power used for this process is 80%, α = 0.05 per set for calculating sample size and the total sum of the two groups sample size is 40. The maximum tensile strength of hybrid metal matrix composite material, AA7178 with (5% and 5%) fly ash and nano ZrO₂ is found to be 35.61% higher than that of as-cast AA7178 without reinforcement. Based on the t-test statistical analysis, there is a significant p = 0.00 (p < 0.05) difference in the mean-variance of tensile strength between groups 1 and 2. Within the confines of this investigation, it is noticeable that adding reinforcement made of 5% fly ash and 5% nano ZrO₂ dramatically increases tensile strength in the AA7178 composite.

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