| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
Characterization of Ti-6Al-4V Microstructure Development in Laser Powder Bed Fusion with Preheat as a Variable Printing Parameter |
| Author(s) |
Evan B. Adcock, Anthony Rollett |
| On-Site Speaker (Planned) |
Evan B. Adcock |
| Abstract Scope |
The morphological development of the constituent α and β phases of Ti-6Al-4V depends on the temperature history of the material and consequently is impacted by the volatile thermal conditions of laser powder bed fusion (LPBF). The actual temperature profile depends on the thermal gradient which can be controlled by substrate preheat temperature at the build plane. Due to limited pathways of heat conduction, the preheat can vary in complex geometries from heat accumulation between layers. To study the effect of varying preheat in LPBF, two inverted pyramids were printed with different delay times between layers. In-situ monitoring is used to verify the temperature profiles that are induced. Further builds of mechanical testing coupons for tensile strength and fatigue performance are planned that will use a heated stage to control the substrate temperature. Microstructure and texture outcomes have been measured by SEM, EBSD, and polarized light microscopy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Characterization |