| About this Abstract |
| Meeting |
2019 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2019)
|
| Symposium
|
2019 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2019)
|
| Presentation Title |
Part-scale Coupled Process-microstructure Model for Additive Manufacturing of Nickel Alloy |
| Author(s) |
Santanu Paul, Qian Chen, Xin Wang, Wei Xiong, Albert To |
| On-Site Speaker (Planned) |
Santanu Paul |
| Abstract Scope |
This work presents a novel part-scale coupled process-microstructure model for simulating the grain growth during the Additive Manufacturing (AM) of Nickel alloy. A finite element thermal model is coupled with the columnar dendrite tip tracking based grain growth model to predict the competitive growth of epitaxial columnar dendritic grains in AM. The thermal model synchronizes the hybrid active-inactive element birth technique with a discrete body heat flux to predict the quasi-steady melt-pool and the local thermal gradient along the liquidus isotherm. At a location, the dendrite arm growth direction is determined by the local thermal gradient and its crystallographic orientation. Thus, for the grains in the first deposition layer, the initial crystallographic orientation is determined from the computationally reconstructed microstructure of the substrate plate grains using Centroidal Voronoi Tessellations. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |