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P: Fachverband Plasmaphysik
P 20: Laser plasma and laser applications 2
P 20.4: Vortrag
Donnerstag, 12. März 2020, 15:00–15:15, b302
Two-dimensional simulations of a water-confined ns-laser shock peening — •Vasily Pozdnyakov1 and Jens Oberrath2 — 1Institute of Product and Process Innovation, Leuphana University Lüneburg, Germany — 2South Westphalia University of Applied Science, Department of Electric Power Engineering, Modeling and Simulation, Soest, Germany
Due to continuously rising demands in microelectronics, aerospace and automotive productions, new surface improvement methods are required. Laser shock peening (LSP) is one of such enhancement techniques, which is considered to be a potential substitute to a conventional shot peening process due to a better performance and a wider application range. LSP deals with laser pulses with high intensities (over 1 GW/cm2) and short durations (ns-range), so all occurring physical phenomena are difficult to measure experimentally. Therefore, computer simulations of plasma formation and shock wave generation are required in order to optimize the process for industrial applications.
In this work, a two-dimensional simulation of a water-confined laser shock peening of aluminium with a circular laser focus is done. The radiation-hydrodynamics code MULTI2D [1] is used, which allows to identify temporal evolution of plasma and shock wave spatial distributions. The occurring processes are analyzed and compared for different peening parameters to get a physical insight into a pulsed laser-matter interaction. The results can be used for LSP optimization.
[1] R. Ramis, J. Meyer-ter-Vehn, and J. Ramírez, Comput. Phys. Commun. 180, 977-994 (2009)