Autor: |
Goodall, Everth Hernández-Nava, Samuel Tammas-Williams, Christopher Smith, Fabien Leonard, Philip Withers, Iain Todd, Russell |
Jazyk: |
angličtina |
Rok vydání: |
2017 |
Předmět: |
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Zdroj: |
Metals; Volume 7; Issue 8; Pages: 300 |
ISSN: |
2075-4701 |
DOI: |
10.3390/met7080300 |
Popis: |
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. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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