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Appl. Sci. 2017, 7(4), 430; doi:10.3390/app7040430

Dense Pure Tungsten Fabricated by Selective Laser Melting

1
School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
2
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)
View Full-Text   |   Download PDF [5285 KB, uploaded 24 April 2017]   |  

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. 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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MDPI and ACS Style

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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