About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
|
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Influence of Powder Properties and Process Parameters on the High Temperature PBF-LB/M Manufacturability of Filigree Tungsten Components |
Author(s) |
Maximilian Binder, Olgu Yücel, Thomas Bareth, Georg Schlick, Alexander Von Mueller, Jeong-Ha You, Pierlugi Fanelli, Birger Buschmann, Riccardo de Luca, Christian Seidel |
On-Site Speaker (Planned) |
Maximilian Binder |
Abstract Scope |
The production of complex lattice structures from pure tungsten is of great inter-est for various fields of application like the energy industry or medical technol-ogy. For nuclear fusion filigree tungsten structures can be used as plasma-facing materials (so called limiters) and can therefore serve as a partial enabler for the future provision of low-risk and sustainable energy through nuclear fusion. Due to the very high melting point of tungsten, its great susceptibility to cracking and hardness, and its high density, the material is difficult to process to a satisfactory degree. This paper therefore presents how tungsten can be processed into fine lattice structures by means of high-temperature laser-based powder bed fusion and to what extent the metal powder and the exposure strategy used have a sig-nificant influence on pores and component defects. It is discussed how particle size distribution and sphericity of the powders have a major impact on the basic processability of the material. Furthermore, it is presented to what extent the laser exposure parameters such as the laser hatch distance can have a great influence on the resulting density of the material and with which methods the actual mate-rial density of lattice cubes can be determined in the first place. Finally, the elec-trical conductivity of the fabricated AM structures is measured and presented, as this is of great interest for many application areas. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |