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| Numerical Simulation on Laser Additive Manufacturing Process for Metal Components |
| WEI Lei1,2, LIN Xin1,2, WANG Meng1,2, MA Liang1,2, HUANG Weidong1,2, HOU Yun’an3 |
( 1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;
2. Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China,
Northwestern Polytechnical University, Xi’an 710072, China;
3. Metrology Center, AECC Xi’an Aero-Engine Company Limited, Xi’an 710021, China ) |
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Abstract During the laser additive manufacturing of metal components, the thermal/mechanical cycles cause the
deformation of the part. The pore and unmelted metal powder reduce the tensile and fatigue properties. The solidification microstructure,
especially the columnar to equiaxed transition (CET), determines the properties of final products. In view of the
above three aspects, this study reviews the developments of the numerical simulating of laser additive manufacturing for metal
components. The current researches and exist problems have been reviewed. And the numerical models used in the simulations
have been discussed, including the finite element method (FEM) for thermal/mechanical problems, computational fluid dynamics
(CFD) for the liquid metal flow in the molten pool and the numerical models (phase field (PF) and cellular automaton
(CA)) for the solidification of microstructure. On the basis of this, the prospect and trend of the numerical simulation of the
laser additive manufacturing for metal components are discussed.
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2017, 
