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Hernandez-Nava, E, Tammas-Williams, S, Smith, C, Leonard, F, Withers, PJ, Todd, I and Goodall, R (2017) X-ray Tomography Characterisation of Lattice Structures Processed by Selective Electron Beam Melting. Metals, 7 (8). ISSN 2075-4701
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Hernández-Nava et al. - 2017 - X-ray Tomography Characterisation of Lattice Structures Processed by Selective Electron Beam Melting.pdf - Published Version Available under License Creative Commons Attribution. Download (5MB) | Preview |
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.
| Item Type: | Article |
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| Uncontrolled Keywords: | Science & Technology; Technology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Materials Science; cellular solids; additive manufacturing; computed tomography; titanium alloys; MECHANICAL-PROPERTIES; TI-6AL-4V |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TK Electrical engineering. Electronics. Nuclear engineering |
| Divisions: | Maritime & Mechanical Engineering (merged with Engineering 10 Aug 20) |
| Publisher: | MDPI AG |
| Related URLs: | |
| Date Deposited: | 11 Apr 2019 08:16 |
| Last Modified: | 04 Sep 2021 01:51 |
| DOI or ID number: | 10.3390/met7080300 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/10532 |
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