The Prediction of Coating Geometry from Main Processing Parameters in Laser Cladding

Nenadl, O.; Ocelík, Václav; Palavra, A.; Hosson, J.Th.M. De

doi:10.1016/j.phpro.2014.08.166

Cited by 63 publications

(17 citation statements)

References 7 publications

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“…The values have been determined from the fits of the model predictions for parabolic function. (5) and (6) for relative coating height and relative coating waviness for the example of the parabolic function, [11]. We have shown [2,3] that the clad height, H, depends only on the scanning speed, S, and the powder feeding rate F, leading to the following dependence:…”

Section: Theoretical Considerationsmentioning

confidence: 90%

“…3) can be expressed as expressions (5) and (6) which is valid in the overlap ratio interval 0.0-0.8, [11]. This gives expressions for relative coating height, H rel , and relative coating waviness, W rel :…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…Since the absolute value of the coating height, the height of the coating measured from the substrate, is a product of relative coating height and a single track height, H, we can combine equations (5), (6) and (7), to: is a function containing only constants a, b, c, d and β, processing parameters, F, S, and an overlap ratio, OR, [11]. The relative coating height and the relative coating waviness only depend on the overlap ratio, i.e.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

See 2 more Smart Citations

Prediction of coating geometry: theory and experiment

Nenadl¹,

Ocelík²,

Palavra³

et al. 2015

Surface and Contact Mechanics Including Tribology XII

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In this contribution we present a comparison between laser clad experiments and model predictions of the entire geometry of laser deposited multi-layered coatings. Recently we have shown that the recursive model describing the geometry of laser clad coatings combined with experimental track characteristics leads to specific functions describing the geometry of coatings formed by overlap of individual tracks depending on the processing parameters. The recursive model provides an adequate description of the whole geometry of the coating from the Height H and width w of a single laser track for any overlap ratio OR. We have shown that the height and width of a single track are well correlated with the main laser cladding processing parameters for both coaxial and side cladding set-ups.Combining these two approaches leads to a prediction of the complete geometry of laser clad coatings from a number of basic processing parameters. These parameters are: Feeding rate F, Laser beam scanning speed S and overlap ratio OR. The functions that describe the height and waviness of the final coating are the same for both coaxial and side cladding set-ups. These model predictions lead to very simple, yet very accurate predictions of the entire geometry of the laser deposited layers.

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Section: Theoretical Considerationsmentioning

confidence: 90%

Section: Theoretical Considerationsmentioning

confidence: 99%

Section: Theoretical Considerationsmentioning

confidence: 99%

See 1 more Smart Citation

Prediction of coating geometry: theory and experiment

Nenadl¹,

Ocelík²,

Palavra³

et al. 2015

Surface and Contact Mechanics Including Tribology XII

View full text Add to dashboard Cite

show abstract

“…Total height was measured to be around 8 mm. It is important to notice that, even though a single clad grows more than 1 mm under the process parameters chosen, continuous, multiple clads will have a different net height because of the overlapping final geometries [23]. Following the steps in this work, process parameters chosen to be suitable for cladding 316L stainless steel in solid forms with the coaxial nozzle used are:…”

Section: Parameter Reduction and Building Of A Solid Formmentioning

confidence: 99%

Section: Parameter Reduction and Building Of A Solid Formmentioning

confidence: 99%

Analysis of the Process Parameter Influence in Laser Cladding of 316L Stainless Steel

Alvarez

Montealegre²,

Pulido-Jiménez

et al. 2018

JMMP

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Laser Cladding is one of the leading processes within Additive Manufacturing technologies, which has concentrated a considerable amount of effort on its development. In regard to the latter, the current study aims to summarize the influence of the most relevant process parameters in the laser cladding processing of single and compound volumes (solid forms) made from AISI 316L stainless steel powders and using a coaxial nozzle for their deposition. Process speed, applied laser power and powder flow are considered to be the main variables affecting the laser cladding in single clads, whereas overlap percentage and overlapping strategy also become relevant when dealing with multiple clads. By setting appropriate values for each process parameter, the main goal of this paper is to develop a processing window in which a good metallurgical bond between the delivered powder and the substrate is obtained, trying simultaneously to maintain processing times at their lowest value possible. Conventional metallography techniques were performed on the cross sections of the laser tracks to measure the effective dimensions of clads, height and width, as well as the resulting dilution value. Besides the influence of the overlap between contiguous clads and layers, physical defects such as porosity and cracks were also evaluated. Optimum process parameters to maximize productivity were defined as 13 mm/s, 2500 W, 30% of overlap and a 25 g/min powder feed rate.

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