About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Presentation Title |
Additive Manufacturing Beyond the Gaussian Beam: Insights from Microstructure-based Modeling Studies |
Author(s) |
Daniel Moore, Giovanni Orlandi, Theron Rodgers, Daniel Moser, Heather Murdoch, Fadi Abdeljawad |
On-Site Speaker (Planned) |
Daniel Moore |
Abstract Scope |
The use of Gaussian laser beams in state-of-the-art metal additive manufacturing (AM) has been shown to introduce large thermal gradients, melt pool defects, and undesirable microstructural features. Recent experimental studies employed spatially extended laser beam profiles to provide greater control over the thermal fields, allowing for tailored grain morphologies and opening the door to enhanced AM process control. With the aid of a recently developed coupled thermal transport-microstructure Monte Carlo model, we investigate the impact of using spatially extended laser beam profiles, such as ring and Bessel beams, on the evolution of thermal fields and grain microstructures. Simulation results show that the use of spatially extended laser beams expands AM processing windows and allows for increased laser scan speeds. Furthermore, our results reveal notable variations in the resultant grain microstructures across a wide range of processing conditions, underscoring the enhanced adaptability and process control using laser beam shaping. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |