| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Characterizing the High Temperature Mechanical Performance and Microstructure of Additively Manufactured Tantalum and Tungsten Alloys |
| Author(s) |
Sharon Park, Mo-Rigen He, Gianna Valentino, Kevin Hemker |
| On-Site Speaker (Planned) |
Sharon Park |
| Abstract Scope |
Advances in additive manufacturing (AM) hold considerable promise in the fabrication and implementation of refractory-based components via near-net-shape processing, but manufacturing refractories with laser-based techniques is not without its challenges. Moreover, the characterization of refractory high-temperature properties is rare, much less for those made via AM. Here, we investigate the process-microstructure-properties relationships for laser powder bed fusion of tungsten and tantalum alloys characterized at elevated temperatures (~1000C). Initial high-temperature tension testing of tantalum showed the typical behavior of decreasing strength and elongation with increasing temperature. However, an anomalous strain hardening behavior was observed at 400C, resulting in a ~9% increase in the tensile strength compared to ambient temperature. Detailed electron microscopy is ongoing to understand the non-uniform and highly anisotropic AM microstructure impact on the mechanical properties. A similar study will be extended to tungsten alloys to present a mechanistic understanding of AM refractory performance at high temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |