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在不同占空比的重复频率脉冲激光辐照下,数值模拟了金属材料前、后表面的温升特性和烧蚀深度变化规律,考察了材料厚度和物性的影响。模拟结果表明,材料前表面温升曲线呈齿状;激光占空比越小或者材料越薄,材料后表面温度越高,烧蚀越深;与连续激光相比,重复频率脉冲激光更有利于金属材料的加热及烧蚀。
The temperature rise characteristics and ablation depths of the front and back surfaces of metal materials were numerically simulated under the different duty cycle repetition frequency pulsed laser irradiation. The effects of material thickness and physical properties were investigated. The simulation results show that the temperature rise curve of the front surface of the material is toothed. The smaller the laser duty cycle or the thinner the material, the higher the surface temperature of the material, the deeper the ablation. Compared with the continuous laser, the repetition frequency pulsed laser is more favorable Metal material heating and ablation.