Chen, Y;
Clark, SJ;
Huang, Y;
Sinclair, L;
Lun Alex Leung, C;
Marussi, S;
Connolley, T;
... Lee, PD; + view all
(2021)
In situ X-ray quantification of melt pool behaviour during directed energy deposition additive manufacturing of stainless steel.
Materials Letters
, 286
10.1016/j.matlet.2020.129205.
(In press).
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Abstract
The Directed Energy Deposition Additive Manufacturing (DED-AM) of SS316L was studied using in situ and operando synchrotron X-ray imaging to quantitively understand the effect of processing parameters on the melt-pool morphology and surface quality. It was found that surface roughness of DED-AM builds can result from melt pool surface perturbations caused by changes in the melt flow and build stage motion perturbations. Process maps are developed that quantitatively correlate build quality to process parameters including powder feed rate, laser power and traverse speed. How the AM process parameters control build efficacy is clarified, and the processing conditions required to dampen surface perturbations leading to roughness were determined.
| Type: | Article |
|---|---|
| Title: | In situ X-ray quantification of melt pool behaviour during directed energy deposition additive manufacturing of stainless steel |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.matlet.2020.129205 |
| Publisher version: | http://dx.doi.org/10.1016/j.matlet.2020.129205 |
| Language: | English |
| Additional information: | © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/). |
| Keywords: | Directed energy deposition, In situ synchrotron X-ray imaging, Laser additive manufacturing |
| 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/10118511 |
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