| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Refractory Metals – Some Historical Observations |
| Author(s) |
Jeffrey Wadsworth |
| On-Site Speaker (Planned) |
Jeffrey Wadsworth |
| Abstract Scope |
In 1980 exciting programs underway in refractory metals required new metallurgical insights. The Trident Missile was an exemplar; the Post Boost Control System operated for a few minutes at a temperature of 1650oC and used Mo, Ta, Nb (Cb), and W alloys and high temperature coatings. I will describe some of the issues that arose in that mission, including the room temperature fracture of Mo fasteners upon refurbishment. This led to a study on the role of oxygen in embrittlement of Mo alloys. The advent of techniques such as in-situ Auger Spectroscopy fracture were key in understanding the true origins of failure, but so were fundamental thermodynamics. I will also touch upon decisions that had been made regarding Nb alloys. The political role of key decision makers in influencing technical options will be described. The relevance to Additive Manufacturing of refractory metals and alloys will be emphasized. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Joining |