%0 Journal Article
%A Bayat, Mohamad
%A Rothfelder, Richard
%A Schwarzkopf, Karen
%A Zinoviev, Aleksandr
%A Zinovieva, Olga
%A Spurk, Christoph
%A Hummel, Mark
%A Olowinsky, Alexander
%A Beckmann, Felix
%A Moosmann, Julian
%A Schmidt, Michael
%A Hattel, Jesper H.
%T Exploring spatial beam shaping in laser powder bed fusion: High-fidelity simulation and in-situ monitoring
%J Additive manufacturing
%V 93
%@ 2214-7810
%C Amsterdam [u.a.]
%I Elsevier
%M PUBDB-2025-00591
%P 104420 -
%D 2024
%X Laser beam shaping is a novel and relatively unexplored method for controlling the melt pool conditions during metal additive manufacturing (MAM) processes, but even so it still holds good promise for achieving site-specific tailored properties. In this work, a comprehensive numerical and experimental campaign is carried out to explore this subject within metal laser powder bed fusion (LPBF). More specifically, a multiphysics numerical model is implemented for simulating the heat and fluid flow conditions during LPBF of Ti6Al4V using arbitrary circular beam shapes with various power distributions spanning from a pure Gaussian beam to a pure ring beam profile. The model is subsequently coupled with cellular automata to describe the beam shape effects on the microstructure evolution. Model validation is carried out in a two-fold manner. First, we compare the predicted melt pool cross-section with the one from ex-situ single track experiments, and we find a deviation of less than 9 
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001322206000001
%R 10.1016/j.addma.2024.104420
%U https://bib-pubdb1.desy.de/record/622955