dc.contributor.author | Škamat, Jelena | |
dc.contributor.author | Černašėjus, Olegas | |
dc.contributor.author | Višniakov, Nikolaj | |
dc.contributor.author | Zhetessova, Gulnara | |
dc.contributor.author | Nikonova, Tatyana | |
dc.contributor.author | Zharkevich, Olga | |
dc.date.accessioned | 2023-09-18T16:09:23Z | |
dc.date.available | 2023-09-18T16:09:23Z | |
dc.date.issued | 2021 | |
dc.identifier.issn | 1996-1944 | |
dc.identifier.uri | https://etalpykla.vilniustech.lt/handle/123456789/111901 | |
dc.description.abstract | In the present study, pulsed laser post-processing was applied to improve the properties of the thermally sprayed NiCrCoFeCBSi/40 wt.% WC coatings. The powder mix was deposited onto a mild steel substrate by flame spray method and then the as-sprayed coatings were processed by Nd:YAG laser. The peak power density applied was between 4.00 × 106 and 5.71 × 106 W/cm2, and the laser operating speed ranged between 100 and 400 mm/min, providing processing in a melting mode. Scanning electron microscopy, energy dispersive spectroscopy, Knop hardness measurements, and “ball-on-disc” dry friction tests were applied to study the effect of the processing parameters on the geometry of laser pass and microstructure, hardness, and tribology of the processed layers. The results obtained revealed that pulsed laser processing provides a mono-lithic remelted coating layer with the microstructure of ultrafine, W-rich dendrites in Ni-based matrix, where size and distribution of W-rich dendrites periodically vary across remelted layer depth. The composition of W-rich dendrites can be attributed to a carbide of type (W, Cr, Ni, Fe)C. The cracks sensitivity of coatings was visibly reduced with the reduction of power density applied. The hardness of coatings was between ~1070 and ~1140 HK0.2 and correlated with microstructure size, being dependent on the processing parameters. The friction coefficient and wear rate of coatings during dry sliding were reduced by up to ~30% and up to ~2.4 times, respectively, after laser processing. | eng |
dc.format | PDF | |
dc.format.extent | p. 1-15 | |
dc.format.medium | tekstas / txt | |
dc.language.iso | eng | |
dc.relation.isreferencedby | Science Citation Index Expanded (Web of Science) | |
dc.relation.isreferencedby | Scopus | |
dc.source.uri | https://doi.org/10.3390/ma14206034 | |
dc.title | Effect of laser processing parameters on microstructure, hardness and tribology of NiCrCoFeCBSi/WC coatings | |
dc.type | Straipsnis Web of Science DB / Article in Web of Science DB | |
dcterms.accessRights | This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited | |
dcterms.license | Creative Commons – Attribution – 4.0 International | |
dcterms.references | 32 | |
dc.type.pubtype | S1 - Straipsnis Web of Science DB / Web of Science DB article | |
dc.contributor.institution | Vilniaus Gedimino technikos universitetas | |
dc.contributor.institution | Karagandos Technikos universitetats | |
dc.contributor.institution | Karagandos technikos universitetas | |
dc.contributor.faculty | Statybos fakultetas / Faculty of Civil Engineering | |
dc.contributor.faculty | Mechanikos fakultetas / Faculty of Mechanics | |
dc.contributor.department | Statybinių medžiagų institutas / Institute of Building Materials | |
dc.contributor.department | Mechanikos mokslo institutas / Institute of Mechanical Science | |
dc.subject.researchfield | T 008 - Medžiagų inžinerija / Material engineering | |
dc.subject.studydirection | F03 - Medžiagų technologijos / Materials technology | |
dc.subject.vgtuprioritizedfields | MC0202 - Metamedžiagos ir nanodariniai / Metamaterials and Nano-structures | |
dc.subject.ltspecializations | L104 - Nauji gamybos procesai, medžiagos ir technologijos / New production processes, materials and technologies | |
dc.subject.en | NiCrCoFeCBSi/WC coatings | |
dc.subject.en | laser processing | |
dc.subject.en | thermal spray | |
dc.subject.en | microstructure | |
dc.subject.en | hardness | |
dc.subject.en | tribology | |
dcterms.sourcetitle | Materials | |
dc.description.issue | iss. 20 | |
dc.description.volume | vol. 14 | |
dc.publisher.name | MDPI | |
dc.publisher.city | Basel | |
dc.identifier.doi | 000716030300001 | |
dc.identifier.doi | 10.3390/ma14206034 | |
dc.identifier.elaba | 108244994 | |