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

Joint 5th International Conference on Advances in Solidification Processes;5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining

土木建筑工程;计算机科学

Chen, Q.^1 ; Moniz Da Silva Sancho, L.^2 ; Guillemot, G.^1 ; Gandin, Ch.-A.^1 ; Bellet, M.^1 ; Bartout, J.-D.^2 ; Berger, M.-H.^2 ; Colin, C.^2

CEMEF - Centre de Mise en Forme des Matériaux, CNRS UMR 7635 - PSL Research University, MINES ParisTech, Sophia Antipolis

06904, France^1

CdM - Centre des Matériaux, CNRS UMR 7633 - PSL Research University, MINES ParisTech, Evry Cedex

91003, France^2

关键词: Alumina materials;    Defect formation;    Heat source modeling;    Laser beam melting;    Manufacturing strategy;    Process parameters;    Scanning velocity;    Thermo-mechanical;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/529/1/012002/pdf
DOI  :  10.1088/1757-899X/529/1/012002

来源: IOP

【 摘 要 】

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.