About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Poster Session
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Presentation Title |
Laser Powder-bed-fusion of Tungsten Materials for Fusion Energy Applications |
Author(s) |
Alberico Talignani, Shiqi Zheng, Philips Depond, Maria Strantza, Jianchao Ye, Yinmin (Morris) Wang |
On-Site Speaker (Planned) |
Alberico Talignani |
Abstract Scope |
Tungsten is an important material for plasma facing component in fusion reactors. To fabricate tungsten components via additive manufacturing such as laser powder-bed-fusion has unique advantages compared to conventional methods. Unfortunately, bulk tungsten suffers from intrinsic brittleness, as its ductile-to-brittle transition temperature (DBTT) is around 500-700 K. It thus remains a great challenge to fabricate tungsten materials without macrocracks. This presentation reports our recent progress on the L-PBF of tungsten material, where two different L-PBF machines are adopted to form near fully dense tungsten samples. We present the characteristic microstructures and residual microstrains in these materials in order to investigate and understand the microcracking mechanisms. We discuss possible strategies to overcome the challenging issue of micro- and macro-cracking in these high melting temperature refractory metals.
The work at Lawrence Livermore National Laboratory was performed under auspices of Department of Energy under contract DE-AC52-07NA27344. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |