About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing of Refractory Metallic Materials
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Presentation Title |
In-situ Alloying of Tantalum-tungsten with Laser Powder Bed Fusion |
Author(s) |
Marissa Linne, Kaila Bertsch, Connor Rietema, Waldi Greene, Steve Burke, Riley Wraith, Amanda Wu, Joe Mckeown, Hye-Sook Park |
On-Site Speaker (Planned) |
Marissa Linne |
Abstract Scope |
Tantalum-tungsten alloys are of interest in high temperature structural applications, but laser powder bed fusion (LPBF)-based printing and pre-alloyed powder production is challenging due to the high melting temperature of tungsten. In this work, the feasibility of LPBF printing with elemental Ta and W powder is assessed. The microstructure, chemical heterogeneity and mechanical performance of LPBF-printed material is compared to that of conventional wrought processed material with optical and electron microscopy and tensile testing. The LPBF-printed alloy showed an increase in yield strength and decrease in uniform elongation compared to the wrought material, a trend similar to that observed in many other alloy systems. The LPBF microstructure contained partially melted tungsten particles, which presented a unique opportunity to investigate the effects of micro-scale chemical heterogeneity on plastic deformation behavior. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, |