| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Additive Manufacturing Informed Tantalum Alloy Development |
| Author(s) |
Colleen Hilla, Guru Dinda, Tatiana Ayers |
| On-Site Speaker (Planned) |
Colleen Hilla |
| Abstract Scope |
Tantalum has relatively good ductility, processability, and weldability compared to other refractory metals. Refractory metals are employed for their high melting point and wear resistance. Alloying can improve strength, hardness, and corrosion resistance. However, it can decrease weldability and additive manufacturability. There are a few primary factors to consider during alloy design for additive manufacturability. Tantalum has a low ductile to brittle transition temperature (DBTT); moreover, alloying and impurities can increase DBTT, decreasing additive manufacturability. Impurities like oxygen can greatly impact Tantalum alloys. The effect of alloying elements on these behaviors has been considered. Segregation plays a major role due to rapid cooling, leading to variations in composition. Modeling was completed using Calphad and first principle methods to predict microstructure, ductility, segregation, and oxidation behavior. Alloys were printed with direct energy deposition. Microstructure, and segregation were analyzed through microscopy and XRD. Ductility and DBTT were tested through thermomechanical testing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Additive Manufacturing, Computational Materials Science & Engineering |