Phase-Field Simulation of Solidification Behavior of AlSi10Mg Alloys Manufactured Through Direct Metal Laser Sintering

Azizi, HosseinEbrahimi, AlirezaOfori-Opoku, NanaGreenwood, MichaelProvatas, NikolasMohammadi, Mohsen this work, we numerically investigate the effect of building direction on the Solidification behaviour and Microstructure evolution of direct metal laser sintered (DMLS)Direct Metal Laser Sintering (DMLS) AlSi10Mg. The building direction, as previously proved in experimental studies, can influence the Solidification behavior and promote morphological Transition in cellular dendritic Microstructure such as columnar-to-TransitionColumnar-to-equiaxed transition (CET). We develop a thermal Thermal model to systemically address the impact of laser processing conditions and building direction on time-dependent Solidification including pulling velocity, thermal gradients, and cooling rates of the molten pool during Direct Metal Laser Sintering (DMLS) of AlSi10MgAlloy. We then study the Microstructure evolution of DLMS-AlSi10Mg for horizontal and vertical building directions. The present model includes heterogenous Nucleation on inoculant particles that triggers the CET, and its results are consistent with the predictions of a previously developed model. In addition, findings are compared with experimental observations to ensure the accuracy of obtained numerical results.