This study systematically investigates the ablation mechanism and thermal conduction characteristics of nanosecond pulsed laser on chopped carbon fiber‐reinforced magnesium matrix composites. By comparing the ablation morphologies of the chopped carbon fiber‐reinforced AZ31B magnesium matrix composite and AZ31B magnesium alloy under laser power (25 W to 50 W), scanning speed (15 mm/s), and pulse frequency (30 kHz), combined with multi‐scale characterization techniques such as scanning electron microscopy, the influence mechanism of carbon fiber reinforcement on laser thermal effects was revealed. Experimental results indicate that the high axial thermal conductivity of chopped carbon fibers enhances the overall thermal conductivity of the composite. Carbon fibers suppress localized matrix overheating through directional heat dissipation, while the surface oxides formed during ablation contribute to an increase in microhardness. This research provides theoretical guidance for optimizing laser processing parameters, emphasizing the critical balance between power selection and fiber distribution in controlling thermal damage.
Zhou et al. (Mon,) studied this question.