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Numerical modeling of laser shock peening with femtosecond laser pulses and comparisons to experiments

机译：飞秒激光脉冲冲击强化的数值模拟及与实验的比较

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摘要

A physics-based model has been developed for laser shock peening (LSP) with femtosecond (fs) laser pulses (fs-LSP), which has never been reported in literature to the authors' best knowledge. The model is tested by comparing simulations with measured plume/shock wave front transient propagations and the LSP-induced hardness enhancement layer thickness. Reasonably good agreements have been obtained. The model shows that fs-LSP can produce much higher pressure than LSP with nanosecond (ns) laser pulses (ns-LSP), and it can also generate very large compressive residual stress in the workpiece near-surface layer with a thickness up to ～100 μm. The developed model provides a powerful guiding tool for the fundamental study and the practical applications of fs-LSP. This study, together with the recently reported work by Nakano et al. [Journal of Laser Micro/Nanoengineering 4(1) (2009) 35-38], has confirmed the feasibility of fs-LSP on both theoretical and experimental sides.
机译：已经开发了基于物理学的模型，用于飞秒（fs）激光脉冲（fs-LSP）的激光冲击喷丸（LSP），文献中从未报道过作者的最佳知识。通过将模拟与测得的羽流/冲击波波前瞬变传播和LSP诱导的硬度增强层厚度进行比较，对模型进行测试。已获得合理的良好协议。该模型表明，fs-LSP可以产生比纳秒（ns）激光脉冲（ns-LSP）高得多的压力，并且还可以在工件近表层中产生很大的压缩残余应力，其厚度可达〜。 100微米开发的模型为fs-LSP的基础研究和实际应用提供了有力的指导工具。这项研究以及Nakano等人最近报道的工作。 [Journal of Laser Micro / Nanoengineering 4（1）（2009）35-38]已在理论和实验方面证实了fs-LSP的可行性。

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  • 来源
    《Applied Surface Science》 |2010年第13期|p.4376-4382|共7页
  • 作者

    Benxin Wu; Sha Tao; Shuting Lei;

  • 作者单位

    Department of Mechanical, Materials and Aerospace Engineering, Illinois Institute of Technology, 10 W. 32nd Street, Engineering 1 Building, Room #207A, Chicago, IL 60616, USA;

    Department of Mechanical, Materials and Aerospace Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA;

    Department of Industrial and Manufacturing Systems Engineering, Kansas State University, Manhattan, KS 66506, USA;

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  • 正文语种 eng
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  • 关键词

    laser shock peening;

    机译：激光冲击喷丸;

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