Dense Pure Tungsten Fabricated by Selective Laser Melting
Source abstract
Abstract
Additive manufacturing using tungsten, a brittle material, is difficult because of its high melting point, thermal conductivity, and oxidation tendency. In this study, pure tungsten parts with densities of up to 18.53 g/cm3 (i.e., 96.0% of the theoretical density) were fabricated by selective laser melting. In order to minimize balling effects, the raw polyhedral tungsten powders underwent a spheroidization process before laser consolidation. Compared with polyhedral powders, the spherical powders showed increased laser absorptivity and packing density, which helped in the formation of a continuous molten track and promoted densification.
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Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Additive Manufacturing and 3D Printing Technologies · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University,S‐106 91 Stockholm, Sweden
Funding
National Magnetic Confinement Fusion Science Program of China
References (26)
Show source-provided references
1. In situ oxide dispersion strengthened tungsten alloys with high compressive strength and high strain-to-failure10.1016/j.actamat.2016.09.034 ↗
2. Mechanical behavior and dynamic failure of high-strength ultrafine grained tungsten under uniaxial compression
3. Tungsten as material for plasma-facing components in fusion devices10.1016/j.jnucmat.2011.01.110 ↗
4. Progress of iter full tungsten divertor technology qualification in Japan: Manufacturing full-scale plasma-facing unit prototypes10.1016/j.fusengdes.2015.12.049 ↗
5. Suppressing pore-boundary separation during spark plasma sintering of tungsten10.1016/j.jnucmat.2013.03.042 ↗
6. Transient high heat load tests on pure ultra-fine grained tungsten fabricated by resistance sintering under ultra-high pressure10.1016/j.fusengdes.2009.08.003 ↗
7. Powder injection molding—An innovative manufacturing method for He-cooled demo divertor components10.1016/j.fusengdes.2011.01.009 ↗
8. A new fully automatic pim tool to replicate two component tungsten demo divertor parts10.1016/j.fusengdes.2013.04.037 ↗
9. Selective laser melting of iron-based powder10.1016/j.jmatprotec.2003.11.051 ↗
10. Laser additive manufacturing of metallic components: Materials, processes and mechanisms10.1179/1743280411Y.0000000014 ↗
11. Intragranular cellular segregation network structure strengthening 316l stainless steel prepared by selective laser melting10.1016/j.jnucmat.2015.12.034 ↗
12. Textures formed in a cocrmo alloy by selective laser melting10.1016/j.jallcom.2015.01.096 ↗
13. Hong, M.H., Min, B.K., and Kwon, T.Y. (2016). The influence of process parameters on the surface roughness of a 3d-printed co-cr dental alloy produced via selective laser melting. Appl. Sci., 6.10.3390/app6120401 ↗
14. Microstructure and mechanical properties of additive manufactured copper alloy10.1016/j.matlet.2016.05.064 ↗
15. Single track formation in selective laser melting of metal powders10.1016/j.jmatprotec.2010.05.010 ↗
16. Laser processing of tungsten powder with femtosecond laser radiation10.2961/jlmn.2012.01.0007 ↗
17. Formation of nanocrystalline tungsten by selective laser melting of tungsten powder10.1080/10426914.2012.663119 ↗
18. Balling phenomena in selective laser melted tungsten10.1016/j.jmatprotec.2015.02.032 ↗
19. Rapid additive manufacturing of mr compatible multipinhole collimators with selective laser melting of tungsten powder10.1118/1.4769122 ↗
20. Parametric analysis of the selective laser melting process10.1016/j.apsusc.2007.02.088 ↗
21. Fabrication of spherical AlSi10Mg powders by radio frequency plasma spheroidization10.1007/s11661-016-3384-z ↗
22. On the role of thermal fluid dynamics into the evolution of porosity during selective laser melting10.1016/j.scriptamat.2015.04.016 ↗
23. Heat transfer modelling and stability analysis of selective laser melting10.1016/j.apsusc.2007.08.074 ↗
24. Insitu technique for measuring the absorption during laser surface remelting10.1007/BF02672536 ↗
25. Flash method of determining thermal diffusivity, heat capacity, and thermal conductivity10.1063/1.1728417 ↗
26. Viscosity of liquid undercooled tungsten10.1063/1.1896432 ↗