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Laser cladding: A high-speed-imaging examination of powder catchment efficiency as a function of the melt pool geometry and its position under the powder stream

Koti, Daniel; Powell, John; Naesstroem, Himani; Spaccapaniccia, Chiara; Voisey, K. T.

Laser cladding: A high-speed-imaging examination of powder catchment efficiency as a function of the melt pool geometry and its position under the powder stream Thumbnail


Authors

Daniel Koti

John Powell

Himani Naesstroem

Chiara Spaccapaniccia



Abstract

This paper provides quantitative information about the paths taken by blown powder particles during laser cladding. A proportion of the powder is "wasted" by bouncing off the solid areas surrounding the melt pool. This wastage reduces the productivity and profitability of the process. In this paper, specially developed software was used to analyze high-speed imaging videos of the cladding process, to monitor the directions of powder particle flight toward and away from the melt pool area. This information has been correlated to the geometry and position of the melt pool zone for three different cladding techniques: single track cladding (A tracks), standard overlapping track cladding (AAA cladding), and a recently developed technique called ABA cladding. The results show that the melt pool geometry, and particularly the overlap between the melt pool and the incoming powder stream, has a strong influence on powder catchment efficiency. ABA cladding was found to have considerably better powder catchment efficiency than standard AAA cladding and this improvement can be explained by consideration of the geometries and positions of the melt pools and surrounding solid material in each case. As powder costs are an important factor in industrial laser cladding, the adaption of the ABA technique, and/or control of pool/powder stream overlap (e.g., by making the powder stream not coaxial with the laser beam), could improve the profitability of the process.

Citation

Koti, D., Powell, J., Naesstroem, H., Spaccapaniccia, C., & Voisey, K. T. (2023). Laser cladding: A high-speed-imaging examination of powder catchment efficiency as a function of the melt pool geometry and its position under the powder stream. Journal of Laser Applications, 35(4), Article 042065. https://doi.org/10.2351/7.0001199

Journal Article Type Article
Acceptance Date Oct 19, 2023
Online Publication Date Nov 7, 2023
Publication Date Nov 1, 2023
Deposit Date Nov 28, 2023
Publicly Available Date Nov 29, 2023
Journal Journal of Laser Applications
Print ISSN 1042-346X
Electronic ISSN 1938-1387
Publisher Laser Institute of America
Peer Reviewed Peer Reviewed
Volume 35
Issue 4
Article Number 042065
DOI https://doi.org/10.2351/7.0001199
Keywords Instrumentation; Biomedical Engineering; Atomic and Molecular Physics, and Optics; Electronic, Optical and Magnetic Materials
Public URL https://nottingham-repository.worktribe.com/output/27089351
Publisher URL https://pubs.aip.org/lia/jla/article/35/4/042065/2920256/Laser-cladding-A-high-speed-imaging-examination-of

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