Yuan Bo-Shi, Zhang Ye, Zhang Wei, Dong Yuan, Jin Guang-Yong
The Key Laboratory of Jilin Province Solid-State Laser Technology and Application, Chang Chun University of Science and Technology, Changchun 130022, China.
Materials (Basel). 2018 Aug 13;11(8):1419. doi: 10.3390/ma11081419.
Ablation morphology affects the quality of laser processing. Therefore, the control of ablation morphology is very important. The influence of spot size combination mode on the ablation morphology of aluminum alloy is studied for the first time. Experimental results show that when the nanosecond laser spot is larger, the ablation morphology looks like a bowl-shape, and there is little solidification near the edge. When the nanosecond laser spot is smaller, the shape of the ablation morphology is similar to a hole, and the protuberance is formed near the edge of the cavity. Through the analysis and simulation of the physical model, the physical mechanism, which describes the influence of the spot size combination mode on the molten pool, is discussed. The research results of this paper have important guiding significance for the control of laser processing effect.
烧蚀形貌影响激光加工质量。因此，控制烧蚀形貌非常重要。首次研究了光斑尺寸组合模式对铝合金烧蚀形貌的影响。实验结果表明，当纳秒激光光斑较大时，烧蚀形貌呈碗状，边缘附近几乎没有凝固现象。当纳秒激光光斑较小时，烧蚀形貌的形状类似于一个孔，在腔体边缘附近形成凸起。通过对物理模型的分析和模拟，探讨了描述光斑尺寸组合模式对熔池影响的物理机制。本文的研究结果对激光加工效果的控制具有重要的指导意义。
