Regensburg 2025 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 9: Poster

MM 9.58: Poster

Montag, 17. März 2025, 18:30–20:30, P1

Atomistic Simulation of Laser-based Powder Bed Fusion of Metals — •Aamir Siddiqui, Simon Kümmel, and Johannes Roth — FMQ, University of Stuttgart, Germany

Additive manufacturing technology applications continue to call for increased reproducibility and quality. The goal is to study the melting and solidification of an AlTi alloy and to create a framework that allows for further studies on arbitrary alloys and metals. Molecular dynamics provides an understanding of the melting and ablation process, resulting in an understanding of different heat transfer mechanisms. The simulation framework makes it possible to see how changes in scanning speed and laser power affect the melting dynamics.

The melting process of alloys shows that a significant amount of argon gas becomes trapped inside the sample. The simulation of powder beds formed by spheres of varying sizes reveals holes that vanish under vacuum conditions, but persist when the simulation box is filled with protective gas, providing information on the creation of defects. By deforming the sample, the influence of gas pockets on the mechanical properties and the evolution of the lattice structure within the sample can be seen.

Keywords: Additive Manufacturing; Molecular Dynamics Simulation; Powder Bed Fusion