| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
Additive Manufacturing of Crack-free W-base Refractory Materials |
| Author(s) |
Ian Mccue, Michael Presley, Michael Brupbacher, Morgan Trexler |
| On-Site Speaker (Planned) |
Ian Mccue |
| Abstract Scope |
Tungsten has a number of exceptional properties – high density, melting point, thermal conductivity, stiffness, and strength – that make it an ideal candidate for high temperature structural applications. However, tungsten’s limited ductility at room temperature makes it challenging to forge and machine parts more complex than a rod or sheet. Formable W-base materials exist, but are either costly or have low operating temperatures. There is significant motivation to additively manufactured W parts, but printed components are riddled with cracks due to shrinkage and limited ductility during cooling. Here, we describe our work to develop W-base materials optimized for selective laser melting by exploring four processing strategies and combinations thereof: chemical (micro alloying), optical (absorbance), solidification rate (melt pool shape and volume), and grain refiners (controlled dopants). Our results demonstrate that even the most challenging metals can be produced additively, providing new potential applications of refractory metals. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |