Abstract

This study reports the pioneering investigation on rotary tool-assisted electrical discharge micro-drilling (RTEDµD) of carbon-aramid hybrid laminate (CAHL). The machining times (MT) for fabricating one through-micro-hole (depth: 1500 µm) on the CAHL containing 1, 2, and 3 layers of aramid were 785 s, 800 s, and 840 s respectively. The MT increased by 20 % for the CAHL containing 3 aramid layers compared to carbon fiber reinforced polymer (CFRP). The diameter of the holes was within 730–900 µm and an overcut of 4.28 %–28.57 % was observed.

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