Modeling and Simulation Investigations on Microstructure Evolution during Additive Manufacturing of AlSi10Mg Alloy

Microstructure has significant effects on the mechanical properties of AlSi10Mg alloy. Therefore, an in-depth understanding microstructure evolution, such as dendrite and Al-Si eutectic, is great significance to obtain desirable manage performance components. In current work, integrated eutectic evolution model based cellular automaton–finite difference (CA-FD) method, taking account solute distribution, growth kinetics, nucleation mechanism, was established. Microstructures as-built selective laser melted (SLMed) samples were characterized by optical microscopy (OM), scanning electron (SEM) backscatter diffraction (EBSD) techniques, experimental results showed that consisted Al grains networks in individual melt pool. Dendrite growth, redistribution ternary alloy dendritic morphologies with different cooling rates numerically investigated. addition, proposed also applied predict under undercooling a range 5 K 20 simulated. The simulated indicated dendrites refined increasing rates, morphology sensitive higher microstructures. Model validations performed, agreed well simulation results, indicating can successfully reproduce both