Effect of reinforcing particle type on morphology and age-hardening behavior of Al-4.5Â wt.% Cu based nanocomposites synthesized through mechanical milling

► HRTEM results show mutual diffusion of Al and Cu occurs through the (200) planes. ► TiC particles enhance alloying process more than the SiC ones at the early stages of MM. ► SiC particles enhance alloying process more than the TiC ones at the final stages of MM.