Issue 71

K. Annapoorna et alii, Frattura ed Integrità Strutturale, 71 (2025) 285-301; DOI: 10.3221/IGF-ESIS.71.21

Fig. 20 displays the percentage elongation for produced composites, which indicates that as particle content increases, the elongation decreases, similar trends were seen [11]. The reason for decrease in elongation is the lower flexibility of the ceramic reinforcement with the matrix. The unshaped ZrO 2 and Al 2 O 3 particles may induce localized pressure around them, and over time, the accumulation of particles near the grain boundaries intensifies this pressure concentration. Overall, the addition of nano Al 2 O 3 and nano ZrO 2 particles enhanced the tensile properties of Al6061 alloy, with optimal results obtained at 1% ZrO 2 and 1% Al 2 O 3 , demonstrating a balanced improvement in strength and ductility.

Figure 17: Stress-Strain curves for Al6061 alloy with various wt% of Al 2 O 3 and ZrO 2 reinforcements

Figure 18: YS of Al6061 alloy and its reinforced composites.

Figure 19: UTS of Al6061 alloy and it’s reinforced composites.

Figure 20: Elongation of Al6061 alloy and its reinforced composite.

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