Soundarapandiyan, G;
Leung, CLA;
Johnston, C;
Chen, B;
Khan, RHU;
McNutt, P;
Bhatt, A;
... Fitzpatrick, ME; + view all
(2023)
In situ monitoring the effects of Ti6Al4V powder oxidation during laser powder bed fusion additive manufacturing.
International Journal of Machine Tools and Manufacture
, 190
, Article 104049. 10.1016/j.ijmachtools.2023.104049.
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Abstract
Making laser powder bed fusion (L-PBF) additive manufacturing process sustainable requires effective powder recycling. Recycling of Ti6Al4V powder in L-PBF can lead to powder oxidation, however, such impact on laser-matter interactions, process, and defect dynamics during L-PBF are not well understood. This study reveals and quantifies the effects of processing Ti6Al4V powders with low (0.12 wt%) and high (0.40 wt%) oxygen content during multilayer thin-wall L-PBF using in situ high speed synchrotron X-ray imaging. Our results reveal that high oxygen content Ti6Al4V powder can reduce melt ejections, surface roughness, and defect population in the built parts. With increasing oxygen content in the part, there is an increase in microhardness due to solid solution strengthening and no significant change in the microstructure is evident.
| Type: | Article |
|---|---|
| Title: | In situ monitoring the effects of Ti6Al4V powder oxidation during laser powder bed fusion additive manufacturing |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ijmachtools.2023.104049 |
| Publisher version: | https://doi.org/10.1016/j.ijmachtools.2023.104049 |
| Language: | English |
| Additional information: | © 2023 The Authors. Published by Elsevier Ltd. under a Creative Commons license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Additive manufacturing, Ti6Al4V, Laser powder bed fusion, Powder recycling, Powder oxidation, Process monitoring |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10173265 |
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