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1
Content available Laser surface texturing: characteristics and applications
Kalinowski Artur, Radek Norbert, Orman Łukasz, Pietraszek Jacek, Szczepaniak Marcin, Bronček Jozef
System Safety : Human - Technical Facility - Environment
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2023
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Vol. 5, iss. 1
240--248
EN
Laser surface texturing (LST) has emerged as a versatile and efficient technique for modifying surface properties across various materials. This paper provides an analysis of the characteristics and diverse applications of laser surface texturing. The paper begins by explaining the fundamental principles underlying LST, highlighting the mechanisms involved in material interaction and the resultant surface modifications. It explores the influence of laser parameters such as pulse duration, energy density, and wavelength on the texturing process, emphasizes their impact on surface morphology, roughness, and topographical features. Furthermore, this paper delves into the wide-ranging applications of LST across different industries and fields. It examines how LST enhances surface functionalities, including improvements in tribological properties, wettability, friction reduction, and biocompatibility. Additionally, the utilization of LST for creating microstructures enabling advanced functionalities in optics, electronics, biomedical devices, and energy harvesting systems is discussed. Moreover, the challenges and future directions in LST technology are highlighted, which encompass advances in precision, scalability, and integration of LST with other manufacturing processes. The potential environmental implications and economic feasibility of LST are also discussed.
2
Content available Formation of coatings with technologies using concentrated energy stream
Radek Norbert, Kalinowski Artur, Pietraszek Jacek, Orman Łukasz J., Szczepaniak Marcin, Januszko Adam, Kamiński Janusz, Bronček Jozef, Paraska Olga
Production Engineering Archives
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2022
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Vol. 28, Iss. 2
117--122
EN
A number of modern surface processing methods use an energy flux. The examples include electro-spark deposition (ESD) and laser beam processing (LBP). The work concerns the study of Cu-Mo coatings deposited on C45 carbon steel, which were then eroded with a laser beam. The analysis included the analysis of the microstructure, measurements of macrogeometry and microhardness, corrosion resistance tests of selected areas after laser treatment. The coatings were applied with ELFA-541 and subjected to Nd:YAG laser treatment with variable laser parameters. The problem presented in the work can be used to extend the knowledge of the areas of application of ESD coatings, especially in sliding friction pairs.
3
Content available Tribological behavior of low-alloyed steel after nitriding
Vicen Martin, Bokůvka Otakar, Nikolić Ružica, Bronček Jozef
Production Engineering Archives
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2020
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Vol. 26, Iss. 3
78--83
EN
The tribological properties of the nitride layer applied to the low-alloyed steel were investigated in this research. Experimental work included determination if the chemical composition, wear resistance, Rockwell, Vickers and nano-indentation tests, both of the substrate material – the low-alloyed steel and the deposited nitride layer. From the results obtained in those experiments authors concluded that applying the nitride layer does not significantly improve the tribological properties of the tested lowalloyed steel samples, thus this process is not recommended for achieving that purpose.
4
Content available Flexural testing of carbon FLP composite bars with annular and square cross section
Bašťovanský Ronald, Konstantová Viera, Bronček Jozef, Kučera Ľuboš
Production Engineering Archives
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2020
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Vol. 26, Iss. 4
138--143
EN
Decrease of vehicle emissions require design changes already at the initial concept design. Use of fiber reinforced polymer (FRP) composites in design cause reduction of weight with increasing other properties. Paper presents the case study of proposal material for frame concept of special light vehicle design. The flexural test (basically three-point bending test) of carbon fiber reinforced polymer composite bars with annular and square cross section is presented. Experimental results were verified by numerical simulation finite element method (FEM). The permanent deformation of bar with annular cross section occurred at a force 2 280 N with deflection 4.22 mm. Model numerical simulation by FEM show same course of loading. For bar with square cross section the deformation occurred at a force 2 264 N, with deflection 7 mm. Model numerical simulation by FEM show different trend (under force 2264 N the deflection was 3.4 mm). The research was supported by the Slovak Research and Development Agency under the contract no. APVV-18-0457, Special Light Electric Vehicle from Unconventional Materials to Heavy Conditions and Terrain - LEV.
5
Content available Investigation of tribological properties of CarbonX coating deposited on 100Cr6 steel
Vicen Martin, Bronček Jozef, Nový František
Production Engineering Archives
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2019
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Vol. 25
52--55
EN
The article deals with a reduction of friction coefficient of bearing steel 100Cr6. Reduction of friction was achieved by means of a CarbonX DLC coating. The coating exhibited excellent friction and mechanical properties. This coating was applied to samples made of 100Cr6 bearing steel. The friction results of the CarbonX coating were compared to the friction results of the 100Cr6 bearing steel. Reducing the friction of 100Cr6 bearing steel resulted in reduced wear and increase lifetime. The friction process of the samples will take place in an environment without lubrication. The aim of the article is to verify the behaviour of the DLC coating without the presence of lubricant in the friction node. The achieved results are to be interpreted in the conclusion of article.
6
Content available remote Analiza struktury geometrycznej powierzchni systemów powłokowych antygraffiti przeznaczonych do zabezpieczania taboru kolejowego
Radek Norbert, Pasieczyński Łukasz, Pietraszek Jacek, Bronček Jozef
Mechanik
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2019
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R. 92, nr 2
124--127
PL
W artykule przedstawiono wyniki badań właściwości systemów powłokowych antygraffiti do zabezpieczania taboru kolejowego. Ocenę tych właściwości przeprowadzono na podstawie pomiarów struktury geometrycznej powierzchni oraz analizy mikrostruktury. Badano następujące systemy powłokowe antygraffiti: XPC 60011, XPC 60012, XPC 60036, BO100-AGR. Składały się one z następujących warstw: antykorozyjnego podkładu epoksydowego, szpachli, podkładu wypełniającego, lakieru bazowego oraz bezbarwnych lakierów antygraffiti. Powłoki zostały naniesione na próbki ze stali S355 za pomocą pistoletów firmy SATA. Ze względu na swoje właściwości systemy powłokowe antygraffiti mogą być z powodzeniem stosowane do zabezpieczania pojazdów szynowych.
EN
The paper presents the results of the properties of anti-graffiti coating systems for rolling stock. The determination was based on measurements of surface geometric structure and analysis of microstructure. The tests were carried out on the following anti-graffiti coating systems: XPC 60011, XPC 60012, XPC 60036, BO100-AGR. The above systems consisted of the following layers: corrosion epoxy primer, putty, primer filler, basecoat and clearcoats anti-graffiti. The coatings were applied to the sample with S355 steel using guns SATA. Because of its properties, anti-graffiti coating systems can be successfully used on rail vehicles.
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