Powder catchment efficiency in laser cladding (directed energy deposition). An investigation into standard laser cladding and the ABA cladding technique

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

Abstract

This paper investigates the efficiency of powder catchment in blown powder laser cladding (a directed energy deposition technique). A comparison is made between standard “track by overlapping track” cladding (“AAA” cladding) and “ABA” cladding, where the gaps left between an initial set of widely spaced tracks (“A” tracks), are filled in by subsequent “B” tracks. In both these techniques, the melt pool surface is the collection area for the cladding powder, and the shape of this pool can be affected by several parameters including cladding speed, intertrack spacing, and type of cladding technique. The results presented here are derived from of an analysis of high-speed videos taken during processing and cross sections of the resultant clad tracks. The results show that the first track in AAA cladding has a different melt pool shape to subsequent tracks, and that the asymmetry of the subsequent track melt pools results in a reduction in the powder catchment efficiency. In contrast to this, the geometry of the “B” track melt pools between their adjacent “A” tracks results in an enhanced powder catchment efficiency.

Citation

Koti, D., Powell, J., Naesstroem, H., & Voisey, K. T. (2023). Powder catchment efficiency in laser cladding (directed energy deposition). An investigation into standard laser cladding and the ABA cladding technique. Journal of Laser Applications, 35, Article 012025. https://doi.org/10.2351/7.0000904

• Journal Article Type: Article
• Acceptance Date: Jan 27, 2023
• Online Publication Date: Feb 15, 2023
• Publication Date: 2023-02
• Deposit Date: May 4, 2023
• Publicly Available Date: May 5, 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
• Article Number: 012025
• DOI: https://doi.org/10.2351/7.0000904
• Keywords: directed energy deposition, laser cladding, ABA laser cladding, fibre laser, melt pool shape. high speed imaging. powder catchment efficiency
• Public URL: https://nottingham-repository.worktribe.com/output/17386361
• Publisher URL: https://pubs.aip.org/lia/jla/article/35/1/012025/2871721/Powder-catchment-efficiency-in-laser-cladding