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Appl. Sci. 2017, 7(4), 430;

Dense Pure Tungsten Fabricated by Selective Laser Melting

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
Authors to whom correspondence should be addressed.
Academic Editor: Peter Van Puyvelde
Received: 21 February 2017 / Revised: 16 April 2017 / Accepted: 19 April 2017 / Published: 23 April 2017
(This article belongs to the Special Issue Materials for 3D Printing)
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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. View Full-Text
Keywords: selective laser melting; pure tungsten; spherical powders; laser absorptivity; packing density; densification selective laser melting; pure tungsten; spherical powders; laser absorptivity; packing density; densification

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Wang, D.; Yu, C.; Zhou, X.; Ma, J.; Liu, W.; Shen, Z. Dense Pure Tungsten Fabricated by Selective Laser Melting. Appl. Sci. 2017, 7, 430.

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