| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Phase Field Simulation of Solidification Behavior of AlSi10Mg Alloys Manufactured Through Direct Metal Laser Sintering |
| Author(s) |
Hossein Azizi, Alireza Ebrahimi, Nana Ofori-Opoku, Michael Greenwood, Nikoas Provatas, Mohsen Mohammadi |
| On-Site Speaker (Planned) |
Mohsen Mohammadi |
| Abstract Scope |
In this work we numerically investigate the effect of building direction on the solidification behaviour and microstructure evolution of direct metal laser sintered (DMLS) AlSi10Mg. The building direction, as previously proved in experimental studies, can influence the solidification behavior and promote morphological transitions in cellular dendritic microstructures such as columnar-to-equiaxed transition (CET). We develop a thermal model to systemically address the impact of laser processing conditions, as well as building direction on time-dependent solidification parameters including pulling velocity, thermal gradients, and cooling rates of the molten pool during DMLS of AlSi10Mg alloy. We then study the microstructure evolution of DLMS-AlSi10Mg for horizontal and vertical building directions. The present model includes a heterogenous nucleation of inoculant particles that triggers the CET and its results are consistent with the predictions of a previously developed model. In addition, we compare our findings with experimental observations to ensure the accuracy of our results. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |