High-Speed Laser Cladding on Thin-Sheet-Substrates—Influence of Process Parameters on Clad Geometry and Dilution

Laser-based Directed Energy Deposition (DED-LB) represents a production method of growing importance for cladding and additive manufacturing through the use of metal powders. Yet, most studies utilize substrate materials with thicknesses of multiple millimeters, for which laser cladding of thin-shee...

Full description

Saved in:
Bibliographic Details
Published in:Coatings (Basel) 2021-08, Vol.11 (8), p.952
Main Authors: Sommer, Niklas, Stredak, Florian, Böhm, Stefan
Format: Article
Language:English
Subjects:
Additive manufacturing
Continuous fibers
Continuous radiation
Design of experiments
Dilution
Ferritic stainless steel
Fiber lasers
Geometry
High speed
Laser applications
Laser beam cladding
Lasers
Metal powders
Metal sheets
Process mapping
Process parameters
Production methods
Productivity
Pulsed lasers
Stainless steels
Substrates
Thickness
Variance analysis
Ytterbium
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Laser-based Directed Energy Deposition (DED-LB) represents a production method of growing importance for cladding and additive manufacturing through the use of metal powders. Yet, most studies utilize substrate materials with thicknesses of multiple millimeters, for which laser cladding of thin-sheet substrates with thicknesses less than 1 mm have only been scarcely studied in the literature. Most studies cover the use of pulsed laser sources, since sheet distortion due to excess energy input is a key problem in laser cladding of thin-sheet substrates. Hence, the authors of the present investigation seek to expand the boundaries of cladding thin-sheet substrates through the use of a high-speed laser cladding approach which utilizes a continuous-wave, ytterbium fiber laser and traverse speeds of 90 mms−1 to clad stainless steel sheets with a thickness of 0.8mm. Furthermore, fundamental process–property relationships for the target values of clad width, clad height, and dilution depth are studied and thoroughly discussed. Additionally, process maps for the target values are established based on manifold experiments, and the significance of process parameters on target values is studied using analysis of variance. The results demonstrate that clad widths as high as 1413 μm and dilution depths as low as 144 μm can be obtained by high-speed laser cladding of thin-sheet substrates. Thus, pathways toward thin-sheet substrates with enhanced performance are opened.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings11080952