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Simulations of gas flow in gas atomisation of liquid metals and validation experiments
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Process. (Powder metallurgy)ORCID iD: 0000-0002-6339-4612
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2021 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The production of metal powder by gas atomisation generates feedstock for many manufacturing techniques, including hot isostatic pressing, laser cladding and, of current interest, powder bed additive manufacturing. While many thousands of alloys are commercially available in bulk form, fewer than fifty are widely available as powders suitable for additive manufacturing. This is due to difficulties in controlling droplet size distribution and avoiding particle defects. Indeed, a typical gas atomisation process that attempts to make powder for powder bed additive manufacturing achieves a yield of suitable powder below 50%. Several studies have simulated the gas atomisation process or part of it, but few validate the models directly. The current work aims to take a first step towards making a holistic and fully validated model for gas atomisation. The gas flow from de Laval nozzles under conditions similar to those used in gas atomisation has been simulated using computational fluid dynamics and experiments to validate these simulations have been performed using shadowgraphy. A validated model can be used as part of a larger model to predict the phenomena that occur in gas atomisation and thereby refine the process to improve the production yield of powders, especially for additive manufacturing.

Place, publisher, year, edition, pages
Edinburgh, 2021. Vol. 1, no 1
National Category
Metallurgy and Metallic Materials Manufacturing, Surface and Joining Technology
Research subject
Metallurgical process science; Materials Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-301145DOI: 10.2218/iclass.2021.5919OAI: oai:DiVA.org:kth-301145DiVA, id: diva2:1591048
Conference
CLASS 2021, 15th Triennial International Conference on Liquid Atomization and Spray Systems, Edinburgh, UK, 29 Aug. - 2 Sept. 2021
Note

QC 20210907

Available from: 2021-09-05 Created: 2021-09-05 Last updated: 2022-06-25Bibliographically approved

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fulltext(434 kB)121 downloads
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File name FULLTEXT01.pdfFile size 434 kBChecksum SHA-512
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Type fulltextMimetype application/pdf

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Publisher's full texthttp://journals.ed.ac.uk/ICLASS_Edinburgh/article/download/5919/7766

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Hulme-Smith, ChristopherKamalasekaran, Arun

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CiteExportLink to record
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Citation style
  • apa
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