About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Usability and Limitations for Predicting Melt Pool Dimensions via Dimensionless Numbers in Laser Powder Bed Fusion (LPBF) |
Author(s) |
Theresa Hanemann, Christoph Seyfert, Astrid Rota, Martin Heilmaier |
On-Site Speaker (Planned) |
Theresa Hanemann |
Abstract Scope |
Recently the use of dimensionless numbers to estimate melt pool geometries in LPBF for different alloys has been seen increased research interest. In contrast to common energy density relations based on process parameters only, dimensionless numbers consider the difference in laser-material interaction by incorporating material thermophysical properties. In this study, two dimensionless numbers, namely dimensionless enthalpy and Peclet number, are introduced and proposed to predict melt pool dimensions of single scan tracks for five different alloys (In718, 316L, Ti6Al4V, M300, AlSi10Mg). Dimensionless enthalpy characterizes the energy input in relation to the energy needed for melting, while the Peclet number, giving a ratio of heat convection to conduction, represents the heat loss during the interaction. Both dimensionless numbers had to be considered to accurately predict melt pool dimensions over a wide range of processing parameters. Corresponding limitations to the validity of the proposed scaling relations will be presented. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |