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Multi-scale Modelling Approach for Contributing to Reduced Distortion in Parts Made by Laser-based Powder Bed Fusion

 
: Seidel, C.; Zaeh, M.F.

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Volltext ()

Procedia CIRP 67 (2018), S.197-202
ISSN: 2212-8271
Conference on Intelligent Computation in Manufacturing Engineering (ICME) <11, 2017, Naples>
Englisch
Zeitschriftenaufsatz, Konferenzbeitrag, Elektronische Publikation
Fraunhofer IGCV ()

Abstract
Within this paper, a control volume-based multi-scale approach for heat input modelling in laser-based powder bed fusion of metals is described. Thereby, the Rosenthal equation is used to analyse beam-powder interaction for a single laser track. Based on both the Rosenthal results for melt pool dimensions and experimentally determined melt pool depth, a single layer model is developed. Results for the temperature field, gathered by applying the single layer model, serve as data for validating the control volume-based approach on the build-up scale. Finally, a case study with a turbine blade delivers the proof-of-concept for the applied modelling approaches, because process-related distortions are reduced by more than 40% through pre-deforming the blade according to build-up simulation results.

: http://publica.fraunhofer.de/dokumente/N-520563.html