Level-set modelling of Laser Beam Melting process applied onto ceramic materials - Comparison with experimental results

Laser Beam Melting (LBM) processes benefit from significant progress in recent years. Currently, manufacturing of ceramic parts for applications at high temperature in aeronautical industries can be planned. However, understanding of defect formation is required in order to optimize manufacturing st...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-05, Vol.529 (1), p.12002
Main Authors: Chen, Q., Moniz Da Silva Sancho, L., Guillemot, G., Gandin, Ch.-A., Bellet, M., Bartout, J.-D., Berger, M.-H., Colin, C.
Format: Article
Language:English
Subjects:
Aluminum oxide
Ceramics industry
Chemical Sciences
Computational fluid dynamics
Evolution
Fluid flow
High temperature
Laser beam melting
Lasers
Manufacturing
Material chemistry
Material properties
Modelling
Morphology
Physical properties
Process parameters
Surface tension
Thermomechanical treatment
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Summary:Laser Beam Melting (LBM) processes benefit from significant progress in recent years. Currently, manufacturing of ceramic parts for applications at high temperature in aeronautical industries can be planned. However, understanding of defect formation is required in order to optimize manufacturing strategy. In this work, level-set modelling is proposed to simulate tracks development during LBM processes. Thermo-mechanical solution is performed in both powder and dense domains. Fluid flow is computed considering the surface tension and Marangoni forces. In addition mechanical resolution is achieved to investigate stress evolution in the rear part of the track. Applications are developed on alumina material. The influence of laser power, scanning velocity and physical properties are investigated and discussed. Validations of the heat source model are proposed by comparisons of melt pool dimensions and shapes with experimental measurements. A coherent evolution of the track morphology is shown when varying process parameters or material properties.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/529/1/012002