| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Processing, Structure, and Properties of Electron Beam Melting Additively Manufactured Pure Tungsten |
| Author(s) |
Christopher Ledford, Patxi Fernandez-Zelaia, Tim Graening, Yutai Kato, Michael M Kirka |
| On-Site Speaker (Planned) |
Christopher Ledford |
| Abstract Scope |
The layer-wise additive manufacturing approach enables opportunities for producing complex geometries from refractory metals which cannot be otherwise achieved via powder metallurgy. However, the processing science is still in its nascent stage and structure-property relations are relatively unexplored. Here we focus on the processing of pure tungsten using electron beam melting AM. Experimentally we develop a suitable processing window for achieving high density crack free material. Microstructural analysis reveals that the microstructure generally consists of a columnar structure with a (111) build direction fiber preference, although, fiber switching was also observed. At a smaller length scales subgrains were observed which are believed to form due to process induced deformation. High temperature tensile testing reveals that the material exhibits excellent strength and ductility. Significant mechanical anisotropy was observed which is likely driven by crystallographic texture. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |