| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Phase-field Solidification Texture Model for Understanding the Microstructure in L-PBF Process |
| Author(s) |
Kamalnath Kadirvel, Guilherme Abreu Faria, Xuesong Gao, Antonio Rameriz, Wei Zhang, Yunzhi Wang |
| On-Site Speaker (Planned) |
Kamalnath Kadirvel |
| Abstract Scope |
Laser-Powder Bed Fusion (L-PBF) is a commonly used method in metal additive-manufacturing (AM). One of the key microstructural features, which affects the mechanical property of the AM product, is the solidification grain texture. We have developed a phase-field model (PFM) which is coupled with a heat-flux model to predict the grain texture in the L-PBF process. Our PFM incorporates the solidification at the melt pool interface, anisotropic mobility of the solid-liquid interface, re-solidification due to multiple laser passes and possible grain-growth near the melt pool. Temperature profile calculated from AM processing parameters such as laser beam power and beam velocity were used as input to the PFM simulations. The simulated texture was compared with EBSD characterization of an AM build IN718 Ni-based superalloy. The model was used to study the effect of different laser scan patterns on the solidification texture. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |