TY  - JOUR
AU  - Bayat, Mohamad
AU  - Rothfelder, Richard
AU  - Schwarzkopf, Karen
AU  - Zinoviev, Aleksandr
AU  - Zinovieva, Olga
AU  - Spurk, Christoph
AU  - Hummel, Mark
AU  - Olowinsky, Alexander
AU  - Beckmann, Felix
AU  - Moosmann, Julian
AU  - Schmidt, Michael
AU  - Hattel, Jesper H.
TI  - Exploring spatial beam shaping in laser powder bed fusion: High-fidelity simulation and in-situ monitoring
JO  - Additive manufacturing
VL  - 93
SN  - 2214-7810
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - PUBDB-2025-00591
SP  - 104420 -
PY  - 2024
AB  - 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 
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001322206000001
DO  - DOI:10.1016/j.addma.2024.104420
UR  - https://bib-pubdb1.desy.de/record/622955
ER  -