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Dense Pure Tungsten Fabricated by Selective Laser Melting
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Number of Authors: 6
2017 (English)In: Applied Sciences, E-ISSN 2076-3417, Vol. 7, no 4, 430Article in journal (Refereed) Published
Abstract [en]

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/cm(3) (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.

Place, publisher, year, edition, pages
2017. Vol. 7, no 4, 430
Keyword [en]
selective laser melting, pure tungsten, spherical powders, laser absorptivity, packing density, densification
National Category
Chemical Sciences Materials Engineering Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-145277DOI: 10.3390/app7040430ISI: 000404447600119OAI: oai:DiVA.org:su-145277DiVA: diva2:1128446
Available from: 2017-07-25 Created: 2017-07-25 Last updated: 2017-12-01Bibliographically approved

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Shen, Zhijian
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Department of Materials and Environmental Chemistry (MMK)
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