About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques
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Presentation Title |
High Speed Video of the Influence of Preheating on Tungsten Microcracking During Laser Scanning |
Author(s) |
Bey Vrancken, Rishi Ganeriwala, Aiden A. Martin, Manyalibo J. Matthews |
On-Site Speaker (Planned) |
Bey Vrancken |
Abstract Scope |
Microcracks in additively manufactured tungsten are currently limiting the range of applications to non-load bearing parts, such as waveguides and collimators. By combining high speed video and thermomechanical modeling, previous work has shown that the microcracks occur after a certain time delay behind the moving melt pool, corresponding to the time to cool down to ductile-to-brittle transition temperature. This study leverages the same procedure to visualize the effect of preheating temperatures up to 1000°C on the microcracking behavior of pure tungsten and tungsten alloyed with different rare earth oxides. The results are an indication of the steps required to produce crack free tungsten parts by additive manufacturing.
Prepared by LLNL under Contract DE-AC52-07NA27344, funded by LDRD 18-ERD-057 and 18-SI-003. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |