About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Crack mitigation in pure tungsten produced by laser powder bed fusion |
| Author(s) |
Tanner Owen McElroy, Yinghang Liu, Michael Holm, Adil Wazeer, Patrick Hearne, Haiyan Wang, Yexiang Xue, Tim Graening, Xiao-Ying Yu, Xinghang Zhang |
| On-Site Speaker (Planned) |
Tanner Owen McElroy |
| Abstract Scope |
Neutron collisions with tungsten (W) monoblocks generate a large amount of heat. Tungsten is used for its high melting temperature and thermal conductivity. Although these characteristics are ideal for the application, they are undesirable for fabrication. Thus, components are produced via powder metallurgy. Traditional methods limit the complexity of components; however, laser powder bed fusion (LPBF) appears to be a promising alternative. Challenges arise in the LPBF of W due to its high ductile-to-brittle transition temperature. Oxygen diffuses into the components, leading to the formation and migration of pores to the grain boundaries, which are subjected to large tensile stresses upon solidification. These and other factors cause the microcrack phenomena observed in previous studies. In this talk, I will discuss a parameter optimization study on W, quantify its effect on cracking behavior and mechanisms observed using optical, SEM, and EBSD, and the mechanisms for crack mitigation in LPBF W. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Characterization |