<div class="csl-bib-body">
<div class="csl-entry">Florian, T., Buttazzoni, M., Zenz, C., & Otto, A. (2025, June 23). <i>Critical Insights: Advanced Simulations Unveiling Ablation Mechanisms in USP Laser Processing</i> [Conference Presentation]. Lasers in Manufacturing Conference (LiM 2025), München, Germany.</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/225531
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dc.description.abstract
Ultra-short pulsed (USP) laser ablation of metals is a crucial process in precision manufacturing, enabling applications such as micro-drilling. Understanding the underlying ablation mechanisms is essential for process optimization and advancing its industrial potential.
This work presents a fully three-dimensional multiphysical simulation framework based on continuum mechanics, incorporating a two-temperature model, Drude absorption, compressible Navier-Stokes equations, and pressure- and temperature-based phase change models. To enhance the predictive power, a pseudo van der Waals equation of state for the gas phase and a novel material model for the liquid phase have been implemented, specifically designed to address near-critical and supercritical regimes.
The improved solver captures the evolution of ablation mechanisms - spanning spallation to phase explosion - across a wide range of fluences governed by variation of pulse energy, diameter, and duration. These insights contribute to a deeper understanding of USP laser-metal interactions and pave the way for optimizing laser processing technologies.
