Hernández-Nava, E., Tammas-Williams, S. orcid.org/0000-0001-9457-2103, Smith, C. et al. (4 more authors) (2017) X-ray tomography characterisation of lattice structures processed by Selective Electron Beam Melting. Metals, 7 (8). 300. ISSN 2075-4701
Abstract
Metallic lattice structures intentionally contain open porosity; however, they can also contain unwanted closed porosity within the structural members. The entrained porosity and defects within three different geometries of Ti-6Al-4V lattices, fabricated by Selective Electron Beam Melting (SEBM), is assessed from X-ray computed tomography (CT) scans. The results suggest that horizontal struts that are built upon loose powder show particularly high (~20 × 10 −3 vol %) levels of pores, as do nodes at which many (in our case 24) struts meet. On the other hand, for struts more closely aligned (0 ◦ to 54 ◦ ) to the build direction, the fraction of porosity appears to be much lower (~0.17 × 10 −3 %) arising mainly from pores contained within the original atomised powder particles.
Metadata
Authors/Creators: |
|
||||
---|---|---|---|---|---|
Copyright, Publisher and Additional Information: | © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). | ||||
Keywords: | cellular solids; additive manufacturing; computed tomography; titanium alloys | ||||
Dates: |
|
||||
Institution: | The University of Sheffield | ||||
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) | ||||
Funding Information: |
|
||||
Depositing User: | Symplectic Sheffield | ||||
Date Deposited: | 23 Aug 2017 10:00 | ||||
Last Modified: | 23 Aug 2017 10:00 | ||||
Published Version: | https://doi.org/10.3390/met7080300 | ||||
Status: | Published | ||||
Publisher: | MDPI | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.3390/met7080300 |