dc.contributor.author | Aliyu, AAA | |
dc.contributor.author | Puncreobutr, C | |
dc.contributor.author | Kuimalee, S | |
dc.contributor.author | Phetrattanarangsi, T | |
dc.contributor.author | Boonchuduang, T | |
dc.contributor.author | Taweekitikul, P | |
dc.contributor.author | Panwisawas, C | |
dc.contributor.author | Shinjo, J | |
dc.contributor.author | Lohwongwatana, B | |
dc.date.accessioned | 2024-05-10T07:51:33Z | |
dc.date.available | 2024-05-10T07:51:33Z | |
dc.date.issued | 2024-04 | |
dc.identifier.issn | 2238-7854 | |
dc.identifier.uri | https://qmro.qmul.ac.uk/xmlui/handle/123456789/96759 | |
dc.description.abstract | Porosity defects are inherently present in Ti–6Al–4V (Ti6-4) parts produced using additive manufacturing (AM) methods like laser powder-bed fusion (LPBF). This work aims to investigate different laser-inherent porosity defects at various LPBF parameter settings and assess their impact on the fatigue behaviour of Ti6-4 implants processed by LPBF. The presence of LPBF-inherent porosity defects with different shapes and sizes was established using microstructural examination and X-ray micro-CT analysis. These mostly comprise lack-of-fusion porosity (LoFP), gas-entrapped porosity (GeP), and pores-induced microcracks. Volumetric porosity defects were seen to range from 1.9 × 104 to 9.52 × 105 μm3. The L-1 specimen exhibited the lowest defect, while the L-6 specimen displayed the largest number of defects. While LoFP defects predominate in L-6, there was a notable presence of GeP defects in the specimens processed using the factory default condition (L-D). Upon examination of the majority of specimens, GeP and LoFP coalesced to form clusters, leading to the formation of pores-induced microcracks. This ultimately leads to a decrease in fatigue performance. By maintaining the power at the default setting and increasing the scan speed by 8% of the default value, a specimen (L-1) with minimal porosity defects and superior fatigue performance is achieved. L-6 exhibits defects with significant dimensions and irregular form. Consequently, it displays inferior fatigue characteristics. | en_US |
dc.language | en | |
dc.publisher | Elsevier BV | en_US |
dc.relation.ispartof | Journal of Materials Research and Technology | |
dc.rights | This item is distributed under the terms of the Creative Commons Attribution 4.0 Unported License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. | |
dc.title | Laser-inherent porosity defects in additively manufactured Ti-6Al-4V implant: Formation, distribution, and effect on fatigue performance | en_US |
dc.type | Article | en_US |
dc.rights.holder | © 2024 The Authors. Published by Elsevier B.V. | |
dc.identifier.doi | 10.1016/j.jmrt.2024.04.225 | |
pubs.notes | Not known | en_US |
pubs.publication-status | Published | en_US |
pubs.publisher-url | http://dx.doi.org/10.1016/j.jmrt.2024.04.225 | en_US |
rioxxterms.funder | Default funder | en_US |
rioxxterms.identifier.project | Default project | en_US |
qmul.funder | Digital Materials Design and Additive Manufacturing for helping patients on bespoke 3D-printed implants::Royal Academy of Engineering | en_US |