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Capturing Marangoni flow via synchrotron imaging of selective laser melting

Clark, SJ; Leung, CLA; Chen, Y; Sinclair, L; Marussi, S; Lee, PD; (2020) Capturing Marangoni flow via synchrotron imaging of selective laser melting. In: MCWASP XV: International Conference on Modelling of Casting, Welding and Advanced Solidification Processes. IOP: Jönköping, Sweden. Green open access

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Abstract

Marangoni flow has a substantial influence on the quality of components fabricated via laser powder bed fusion (LPBF). However, Marangoni flow in melt pools is rarely quantified due to the opacity of liquid metals and the necessity for in situ evaluation. Here we report the findings of high-temporal-resolution synchrotron x-ray radiography experiments tracking the flow in the melt-pool. Dense, highly attenuating tungsten carbide particles are seeded within an elemental powder blend of aluminium and copper of varying composition. Due to the extremely high temporal resolution of greater than 50 kfps at the 31-ID-B beamline at the Advanced Photon Source, USA, we can track the position of tracer particles from frame to frame. This data provides valuable process guidance for optimising mixing and informs the development and validation of multiphysics models.

Type: Proceedings paper
Title: Capturing Marangoni flow via synchrotron imaging of selective laser melting
Event: MCWASP XV: International Conference on Modelling of Casting, Welding and Advanced Solidification Processes
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/1757-899X/861/1/012010
Publisher version: https://doi.org/10.1088/1757-899X/861/1/012010
Language: English
Additional information: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (http://creativecommons.org/licenses/by/3.0). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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/10102986
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