On the geometry of coating layers formed by overlap

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

doi:10.1016/j.surfcoat.2014.01.018

Cited by 76 publications

(39 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is in a good agreement with results obtained in previous studies [12]. The single track dimensions influence on the profile and on the roughness characteristics of the layer produced by single tracks overlapping [13]. It was confirmed by the results of the coating surface investigations conducted using a MarSurf XT 20 roughmeter and a Keyence VHC-600 3D microscope (see Figs.…”

Section: Resultssupporting

confidence: 91%

High precision surface protection of Al-based alloy parts using laser micro cladding

Melnik

Тарасова

Gvozdeva

et al. 2016

Mechanics & Industry

View full text Add to dashboard Cite

-Laser cladding is a well-known technique for wear protection coating tasks. Modern equipment for laser cladding enables material to be deposited with a lateral resolution of about 100 µm and to produce high precision surface coating on small size parts. In this paper laser micro cladding process was investigated to produce wear protective coatings on Al-based alloy surface. Al-matrix composite (AlSi30) surface layers with thickness in the range 15-600 µm were formed on AlMgSi0,5 alloy surface by laser micro cladding. The influence of laser cladding parameters (powder mass flow, vertical increment etc.) and layers number on quality of the deposited coatings was investigated. The homogeneous and free of pores and cracks coating microstructure was produced. The influence of the laser cladding parameters and layers number on functional characteristics of the deposited coatings (e.g. hardness, abrasive wear resistance and electrical conductivity) was investigated. It was found that hardness and wear resistance of the coatings increased with the decrease of powder mass flow. The technological possibility of AlSi30 wear protective layers production on surface of AlMgSi0,5 alloy with roughness up to Ra 1,2 µm and microhardness up to 300 HV0,05 using laser micro cladding technology was demonstrated.

show abstract

Section: Resultssupporting

confidence: 91%

High precision surface protection of Al-based alloy parts using laser micro cladding

Melnik

Тарасова

Gvozdeva

et al. 2016

Mechanics & Industry

View full text Add to dashboard Cite

show abstract

“…We have found parabolic function to be the most optimal as it has an excellent agreement with experimental results while still keeping the model very simple [9]. Our model always converges to a stable shape, i.e.…”

Section: Introductionsupporting

confidence: 59%

“…Recently we have designed a recursive model for prediction of a profile of coatings created by overlap of individual laser tracks [9] based on simplified physical assumptions. Defining the overlap ratio, OR, i.e.…”

Section: Introductionmentioning

confidence: 99%

Prediction of coating geometry: theory and experiment

Nenadl¹,

Ocelík²,

Palavra³

et al. 2015

Surface and Contact Mechanics Including Tribology XII

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…In this study, high velocity, a high powder feed rate and high laser power were combined to build overlapping coatings. The specific laser energy of A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 6 this parameter (36.67 J/mm 2 ) combined with a 4-mm laser beam diameter and 40% overlap recommended in recent studies [9,23] allowed us to obtain adequate coatings.…”

Section: Geometry and Microstructure Of The Coatingsmentioning

confidence: 99%