Abstract
We fabricated 0.4 wt.% reduced graphene oxide (RGO)-reinforced microlaminated Al-Mg-Si composite with two different grain sizes (layer thicknesses) of approximately 1 μm and 2 μm. It was found that the thinner layer, the more significant the RGO incorporation accelerated the ageing kinetics. The peak-aged RGO-Al composite with ∼1 μm lamellae thickness had considerably higher mechanical strength and uniform elongation, as compared to their unreinforced counterpart and the composite with ∼2 μm lamellae thickness. Such a strength-ductility synergy was likely to come from a combined effect of the refined grain size and the facilitated dislocation storage in the matrix grains.
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