Daniel Koti
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.
Authors
John Powell
Himani Naesstroem
Chiara Spaccapaniccia
Dr KATY VOISEY katy.voisey@nottingham.ac.uk
ASSOCIATE PROFESSOR
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 |
Files
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
(6.4 Mb)
PDF
Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
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