| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Modeling Morphological Development of Ti-6Al-4V for Cyclic Thermal Histories in Laser Powder-bed Fusion |
| Author(s) |
Evan B. Adcock, Anthony Rollett |
| On-Site Speaker (Planned) |
Evan B. Adcock |
| Abstract Scope |
Laser powder-bed fusion (LPBF) introduces rapid temperature changes and cyclic thermal histories impacted by printing parameters and part geometry. This research aim is to develop a model that can efficiently compute predicted morphological outcomes of Ti-6Al-4V from LPBF temperature histories. Baseline microstructure results have been analyzed in an “inverted pyramid” part that was developed to generate variability in thermal history throughout the build. The geometry induced elevated preheat temperatures in subsequent layers which result in different cooling rates and thermal cycling. More data for validation will be gathered in future builds from process monitoring with a controlled stage preheat. Simultaneously a thermal simulation has been performed to provide thermal history input to the microstructure model. Comparison of the thermal histories with observed α morphology suggests the model can be simplified to predict microstructure based on the cooling rate after the last peak above the temperature of α dissolution. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |