This doctoral thesis presents the potential of beam shaping in laser-based powder bed fusion of metals. For this purpose, the influence of ring-shaped beam profiles on melt track geometries and top surface topology is initially investigated. Next, a semi-analytical model is implemented, providing a process signature enabling the comparison of processes with different beam shapes. Finally, the influence of ring-shaped beam profiles on spatter formation and the resulting microstructure is demonstrated. In conclusion, a fundamental understanding of the relationship between beam profile characteristics, modeled process signatures, process behavior, and resulting component properties is created.
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This doctoral thesis presents the potential of beam shaping in laser-based powder bed fusion of metals. For this purpose, the influence of ring-shaped beam profiles on melt track geometries and top surface topology is initially investigated. Next, a semi-analytical model is implemented, providing a process signature enabling the comparison of processes with different beam shapes. Finally, the influence of ring-shaped beam profiles on spatter formation and the resulting microstructure is demonstr...
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