Abstract

ABSTRACT Laser ablation can be incorporated for surface treatment of carbon-reinforced aluminium laminate (CARALL) with environmental benefit as compared to chemical treatments. In the present research, laser surface structuring with different patterns was implemented on the aluminium substrates. The effect of laser-texturing pattern on the performance of CFRP/Al (carbon fiber reinforced polymer/aluminium) interface was investigated by undertaking lap shear, modes I and II interlaminar fracture tests. The laser surface structuring developed micro topography on the metal adherent and enhanced the interfacial area, mechanical interlocks, fiber bridging and cohesive failure in the CFRP/Al interface. The X-pattern with six successive passes of laser ablation offered the highest laser surface coverage (85.6%), leading to the improvement of lap shear strength, mode I and II critical interlaminar fracture toughness as high as 40, 110 and 52%, respectively, as compared to the chemical treated samples.

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