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The ejection of molten aluminum after the interaction with millisecond pulsed laser

机译：与毫秒脉冲激光相互作用后熔融铝的喷射

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摘要

The ejection process of molten aluminum after the interaction with millisecond pulsed laser is studied through building a flow model of molten liquid after the end of pulse. Through the analytical and numerical calculations, the pressure in molten liquid near the surface, the liquid ejection duration, and the average velocity of the liquid at end of pulse can be obtained. From these calculation results and the images of ejection process recorded by the high speed camera, it can be inferred that liquid ejection after the interaction with millisecond pulsed laser is due to the release of surface energy of molten liquid. The calculation result accords well with the experimental result reported in literature, and the flow model of molten liquid can be used to further explain the ejection types in the experiment. The dependences of the ejection duration on radius of molten pool and on laser pulse power density are discussed.
机译：通过建立脉冲结束后的熔融液流动模型，研究了与毫秒脉冲激光相互作用后熔融铝的喷射过程。通过分析和数值计算，可以获得在表面附近的熔融液体中的压力，液体喷射持续时间以及脉冲结束时液体的平均速度。从这些计算结果和高速照相机记录的喷射过程的图像中，可以推断出与毫秒脉冲激光相互作用之后的液体喷射是由于熔融液体的表面能的释放。计算结果与文献报道的实验结果吻合良好，可以利用熔融液的流动模型进一步解释实验中的喷射类型。讨论了喷射持续时间对熔池半径和激光脉冲功率密度的依赖性。

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  • 来源
    《Journal of Optics》 |2017年第3期|231-240|共10页
  • 作者

    Zang Yannan; Ni Xiaowu; Han Bing;

  • 作者单位

    China South Industry Academy, Beijing, China,Department of Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, China;

    Department of Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, China;

    Department of Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, China;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ejection of molten liquid; Laser processing; Millisecond pulsed laser; Surface energy of liquid;

    机译：喷射熔融液体;激光加工;毫秒脉冲激光;液体表面能;

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