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Tytuł:
The effect of laser surface texturing on frictional performance of sliding pair
Autorzy:
Antoszewski, B.
Powiązania:
https://bibliotekanauki.pl/articles/359841.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
friction
laser texturing
lubrication
Opis:
In this paper, a Nd:YAG laser was used to generate micropores on SiC surface and the structure and morphology features of surface micropores were observed. Tribological experiments were conducted with pin-on-disc tester under various loads and speeds. The article concentrates on identification of friction processes and also attempts to find a correlation between surface energy, friction force and topography of surface with geometrical texture.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 31 (103); 14-18
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of oil pocket shape and density on friction in reciprocating sliding
Autorzy:
Wos, Slawomir
Koszela, Waldemar
Dzierwa, Andrzej
Reizer, Rafal
Pawlus, Pawel
Powiązania:
https://bibliotekanauki.pl/articles/2087013.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
laser texturing
reciprocating motion
friction
Opis:
The purpose of this work is to study the effect of oil pocket shape and density on friction in reciprocating sliding. The experiments were conducted in reciprocating motion under starved lubrication conditions. Tribological tests were performed using an Optimol SRV5 tribotester. The frictional pair consisted of two discs of 42CrMo4 steel. One disc was laser textured. The oil pockets had circular and sandglass shapes. Disc samples of various texture shapes were characterized by the same pit-area ratios. The operating parameters were the same for all friction pairs. In most cases, surface texturing led to reductions in friction force value and scatter. For both dimple shapes, the best tribological properties were achieved for oil pocket density of 9%. When discs with circular dimples were tested, the highest resistance to motion was received for the highest pit-area ratio of 9%. On the contrary, the worst tribological performance of discs with sandglass-shaped oil pockets of sandglass shape were obtained for the largest oil pocket density of 22%.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 2; 338--345
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Star-Like SurfaceTexture for Enhanced Hydrodynamic Lubrication Performance
Autorzy:
Uddin, M. S.
Liu, Y. W.
Shankar, S.
Powiązania:
https://bibliotekanauki.pl/articles/356465.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
surface texturing
friction
film pressure
numerical modelling
Reynolds equation
Opis:
This paper presents a numerical modelling and optimization of a new ‘star-like’ geometric texture shape with an aim to improve tribological performance. Initial studies showed that the triangle effect is the most dominant in reducing the friction. Motivated with this, a ‘star-like’ texture shape consisting of a series of triangular spikes around the centre of the texture is proposed. It is hypothesised that by increasing the triangular effect on a texture shape, the converging micro-wedge effect is expected to increase, hence increasing the film pressure and reducing the friction. Using the well-known Reynolds boundary conditions, numerical modelling of surface texturing is implemented via finite difference method. Simulation results showed that the number of apex points of the new ‘star-like’ texture has a significant effect on the film pressure and the friction coefficient. A 6-pointed texture at a texture density of 0.4 is shown to be the optimum shape. The new optimum star-like texture reduces the friction coefficient by 80%, 64.39%, 19.32% and 16.14%, as compared to ellipse, chevron, triangle and circle, respectively. This indicates the potential benefit of the proposed new shape in further enhancing the hydrodynamic lubrication performance of slider bearing contacts.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1863-1869
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface Texturing on a CNC Machine Tool Using a Laser
Autorzy:
Józwik, Jerzy
Dziedzic, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2201901.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
laser micromachining
laser surface texturing
CNC machine tool
surface topography
Opis:
In the paper stages of the process of constituting a surface with the texture of the injection mold of a wheeled vehicle steering wheel using laser technology was discusses. During micromachining process with texturing there is a 5-axis CNC-controlled CNC machine TOOL LASERTEC 65 Shape used with a rigid monoBLOCK structure with Siemens 840D sl control, equipped with a fiber laser with a power of 100W, a wavelength of 1064 nm and a focal length of 181 mm. Processing technology was prepared using Autodesk Maya, Adobe Photoshop, Adobe Illustrator, NX9, Lastex v. 2.27.26 computer programs and machine tool control systems. Results of machining the steering wheel of a wheeled vehicle with a concentrated laser beam are discussed. Geometric structure of the surface after texturing was evaluated. Presented technology can be used to obtain the desired texture properties on the surface of the parts.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 1; 160--172
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration-Assisted Laser Surface Texturing and Electromachining for the Intensification of Boiling Heat Transfer in a Minichannel
Autorzy:
Piasecka, M.
Strąk, K.
Grabas, B.
Powiązania:
https://bibliotekanauki.pl/articles/356459.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
developed surface
vibration laser texturing
electromachining
heat transfer enhancement
minichannel
Opis:
The paper describes applications of the vibration-assisted laser surface texturing and spark erosion process as methods of modifying properties and structures of metal surfaces. Practical aspects of the use of produced surfaces in the heat exchanger with a minichannel have been described. Compared with smooth surfaces, developed metal surfaces obtained by vibration-assisted laser surface texturing and electromachining show more effective heat transfer. The local heat transfer coefficient for the saturated boiling region obtained for developed surfaces had the values significantly higher than those obtained for the smooth plate at the same heat flux. The experimental results are presented as the heated plate temperature (obtained from infrared thermography) and relationships between the heat transfer coefficient and the distance along the length of the minichannel for the saturated boiling region.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 1983-1990
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction evaluation of laser textured tool steel surfaces
Autorzy:
Šugárová, J.
Šugár, P.
Frnčík, M.
Powiązania:
https://bibliotekanauki.pl/articles/386955.pdf
Data publikacji:
2017
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
laser surface texturing
dimple-like depressions
friction coefficient
lubrication
ring test
Opis:
Surface textures can be defined as a regularly arranged micro-depressions or grooves with defined shape and dimensions. These textures, if they are manufactured by laser ablation process, contribute to a significant improvement of the tribological, optical or various biological properties. The aim of this paper is to analyze the influence of the surface textures prepared by laser surface texturing (LST) at the friction coefficient value measured on the tool (90MnCrV8 steel) – workpiece (S235JRG1 steel) interface. Planar frontal surfaces of compression platens have been covered by parabolic dimple-like depressions with different dimensions. The morphological analysis of such manufactured depressions has been performed by laser scanning microscopy. Influence of such created textures on the tribological properties of the contact pair has been analyzed by the ring compression test method in the terms of hydrodynamic lubrication regime. The experimental research shown that by applying of surface textures with defined shape and dimensions and using an appropriate liquid lubricant at the same time, the coefficient of contact friction can be reduced nearly to the half of its original value.
Źródło:
Acta Mechanica et Automatica; 2017, 11, 2; 129-134
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of laser texturing on tribological properties of DLC coatings
Autorzy:
Radek, Norbert
Tokar, Dorota
Kalinowski, Artur
Pietraszek, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1839527.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
DLC
laserowe teksturowanie
powłoki
właściwości tribologiczne
grafit
laser texturing
coatings
tribological properties
graphite
Opis:
The work presents the use of laser texturing of DLC coatings to improve tribological properties. The coatings were applied by the PVD method to the rings made of 4H13 steel. The surface texturing was = 343 nm.performed with the TruMICRO 5325c picosecond laser with the radiation wavelength The surface microstructure analysis, surface microgeometry and microhardness measurements and tribological tests were carried out. The problem presented in the paper can be used to extend the knowledge of the areas of application of DLC coatings, especially in sliding friction pairs.
Źródło:
Production Engineering Archives; 2021, 27, 2; 119-123
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The application of laser texturing in surface layer patterning of the combustion engines elements
Autorzy:
Napadłek, W.
Woźniak, A.
Chrzanowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/243803.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
laser ablation micro-treatment
surface layer
microstructure
micro-oil containers
laser texturing
Opis:
In this paper, selected examples of the laser texturing of the surface layer patterning of the elements of the combustion engines were presented. A laser oil micro-container fabrication method was presented. Finishing cylinder liner, spigot of the camshaft, spigot of the crankshaft, rod and piston pin of the combustions engine were patterned. Laser patterning was done with the Nd: YAG laser with wavelength of λ=1064 nm. The manufactured micro-containers provide better lubrication of the friction associations. The conducted experiments allowed obtaining very regular surface texture what was found to be advantageous to the tribological processes and decrease of the wear of the frictional association in the combustions engines. Micro-bowls and micro-grooves were formed on the selected elements of the crank-piston elements and timing gear elements, including: the main spigots and rod spigots of the crankshaft, side surfaces of the base and the connecting rod head, piston pin and peg of the camshaft of the ZI type 126A1 engine. Textured elements of the piston-rod system and the camshaft were then successfully applied in a real object in so-called “cold ignitions” in low temperature chamber. With the use of laser ablation texturing, at optimized experimental parameters, it is possible to form on the piston-rod and timing gear elements oil micro-containers with varied shapes and surface coverage. It allows improving the association conditions in these systems, especially due to the formation of oil microfilm, which efficiently separates mentioned elements even while under high thermal, heat and mechanical load.
Źródło:
Journal of KONES; 2015, 22, 1; 235-242
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of surface texture parameters on friction characteristics under starved lubrication
Autorzy:
Wu, Shen
Zhang, Pan
Wei, Haijun
Chen, Lei
Powiązania:
https://bibliotekanauki.pl/articles/259916.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine diesel engine
cylinder liner and piston ring
friction reduction
starved lubrication
laser texturing
Opis:
A cylinder liner and piston ring running under starved lubrication near the top dead centre (TDC) and bottom dead centre (BDC) cause abnormal friction and wear during operation of a marine diesel engine. The method of laser texturing is proposed to improve the surface friction property under this condition. Spherical crown pits with different parameters were formed on the surface of samples by femtosecond laser processing. The BDC and TDC conditions of oil starvation were simulated in a reciprocating friction and wear experiment, and a numerical model of Surface texture lubrication based on the Reynolds equation was established. The influence of the distribution density, diameter, and depth parameters of the texture on the surface properties was studied. In the BDC condition, compared with the untextured surface, the average coefficient of friction (COF) can be reduced by up to 24% and the average friction force can be reduced by up to 18%. In the TDC condition, the COF can be reduced by up to 19%, and the average friction force can be reduced by up to 18%. Therefore, the textures with various parameters should be arranged in different positions on the cylinder liner; more attention should be paid to the optimisation of diameter in the texture of the cylinder liner near the BDC, whereas more attention should be paid to the optimisation of distribution density in the texture of the cylinder liner near the TDC
Źródło:
Polish Maritime Research; 2020, 2; 96-106
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Selected Properties 100CrMnSi6-4 Surface Layer After Laser Micro-Smelting
Autorzy:
Napadłek, W.
Powiązania:
https://bibliotekanauki.pl/articles/352266.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
technological surface layer
100CrMnSi6-4 bearing steel
ablative laser texturing
laser hardening
microstructure
Opis:
The use of laser ablation phenomenon with the “thermal effect” to produce surface textures, mainly lubricant micro-containers in the form of spherical micro-bowls in the surface layer of 100CrMnSi6-4 alloy of bearing steel. This is interesting research topic. The application the local (zonal) laser hardening of the steel surface layer on the surface of the bearing raceway or casts gives technological opportunities to deploy those technologies in the production process. The article presents the selected results of the own laboratory studies of hardness, microstructure and surface stereometry bearing steel 100CrMnSi6-4 in different states after volume hardening and low tempering, as well as those obtained as a result of laser surface texturing and laser pulsed hardening. The study results can be used to modify the surface layer of 100CrMnSi6-4 bearing steel and in the nearest future use ablative laser texturing of the rolling bearings treadmill surface in the production of lubricanting micro-containers, for improving the wear resistance tribological pair of roller – raceway in the friction conditions.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 757-762
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Micromachining And Pattering In Micro/Nano Scale On Macroscopic Areas
Mikroobróbka i litografia w mikro- nano- skali w obszarach makroskopowych
Autorzy:
Marczak, J.
Powiązania:
https://bibliotekanauki.pl/articles/353538.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lasers
surface modification
texturing
interference lithography
direct writing
lasery
modyfikacja powierzchni
teksturowanie
litografia zakłóceń
mikroobróbka
Opis:
This paper presents detailed discussion of selected examples of laser technologies for the modification of solid surfaces, including topographic and microstructural changes as well as both these alterations simultaneously. Laser surface micromachining has just entered the new generation of technologies that are used in surface engineering. It will be shown on the examples of applications in bioengineering, on the base of the author’s own research, in modification of materials such as titanium and its alloys, diamond-like layers (DLC) deposited on silicon and polymer substrates.
Artykuł przedstawia szczegółowe omówienie wybranych przykładów technologii laserowych związanych z modyfikacją powierzchni ciał stałych, obejmujących zmiany topograficzne i zmiany mikrostrukturalne, lub obie te zmiany jednocześnie. Laserowa mikroobróbka powierzchni weszła już do nowej generacji technologii, wykorzystywanych w inżynierii powierzchni. Zostanie to pokazane, na podstawie prac własnych, na przykładach zastosowań w bioinżynierii, w modyfikacji takich materiałów jak tytan i jego stopy oraz warstwy diamentopodobne (DLC) naniesione na podłoże krzemowe i polimerowe.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3; 2221-2234
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of heterogeneous surfaces by ESD and LBM
Autorzy:
Radek, N.
Pliszka, I.
Antoszewski, B.
Świderski, B.
Pietraszek, J.
Powiązania:
https://bibliotekanauki.pl/articles/111850.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
heterogeneous surfaces
electro-spark deposition
ESD
laser beam machining
LBM
texturing
properties
powierzchnia heterogeniczna
obróbka wiązką laserową
teksturowanie
Opis:
The paper is concerned with testing Cu-Mo coatings deposited over carbon steel C45 which were then eroded with a laser beam. The properties were assessed by analyzing the effects of laser eroded, texturing methodology and wear tests. The tests were conducted for Mo and Cu coatings (the anode) which were electro-spark deposited over the C45 steel substrate (the cathode) and melted with a laser beam. The coatings were deposited by means of an ELFA-541. The laser processing was performed with an Nd:YAG laser. The coatings after laser processing are still distinguished by very good performance properties which make them suitable for use in sliding friction pairs.
Źródło:
Production Engineering Archives; 2016, 13, 4; 44-48
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence Of Laser Beam Intensity On Geometry Parameters Of A Single Surface Texture Element
Wpływ natężenia wiązki laserowej na parametry geometrii pojedynczego elementu tekstury powierzchni
Autorzy:
Antoszewski, B.
Sęk, P.
Powiązania:
https://bibliotekanauki.pl/articles/351358.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
laser microprocessing
laser surface texturing
laser ablation
ultrashort pulses
mikroobróbka laserowa
teksturowanie powierzchni lasera
ablacja laserowa
impuls ultrakrótki
Opis:
Laser surface texturing is used more and more often in modern machines for the implementation of variety of purposes such as for example intensification of lubrication, intensification of heat exchange, stimulation of microfluidics, increasing the chemical activity of the surface. Owing to the development of technologies using a concentrated energy flux, including laser microprocessing, it has become feasible. The present paper concentrates on the selection of parameters of laser microprocessing with picosecond pulses so as to obtain the highest efficiency and accuracy of the execution of a single texture element.
W nowoczesnych maszynach dla realizacji różnych celów m.in. takich jak przykładowo intensyfikacja smarowana, intensyfikacja wymiany ciepła, stymulowanie mikroprzepływów, zwiększenie aktywności chemicznej powierzchni; coraz częściej stosuje się teksturowanie powierzchni. Stało się to możliwe dzięki rozwojowi technologii wykorzystujących skoncentrowany strumień energii, do których należy mikroobróbka laserowa. Tematyka opracowania koncentruje się na analizie parametrów mikroobróbki laserowej impulsami pikosekundowymi w celu osiągnięcia jak największej wydajności i dokładności wykonania pojedynczego elementu tekstury.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3; 2215-2219
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Surface Texturing on the Frictional Resistance of Steel-Bronze Assembly in Lubricated Sliding
Wpływ teksturowania powierzchni na opory tarcia układu stal–brąz w warunkach smarowania
Autorzy:
Koszela, W.
Gałda, L.
Dzierwa, A.
Pawlus, P.
Sęp, J.
Ochwat, S.
Powiązania:
https://bibliotekanauki.pl/articles/190109.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
surface texturing
oil pockets
burnishing
steel-bronze assembly
friction coefficient
teksturowanie powierzchni
kieszenie olejowe
nagniatanie
skojarzenie materiałowe stal-brąz
współczynnik tarcia
Opis:
The experiments were carried out using a block-on-ring tester. The block samples made from bronze CuSn10P of 138 HB hardness were burnished to obtain surfaces with circular oil pockets. Rings were made from 42CrMo4 steel of hardness 40 HRC. Friction tests were conducted at a constant normal load of 900 N. Tests were carried out at increasing sliding speeds of the range 0.08 – 0.82 m/s, starting from the lowest speed. The every speed was maintained for two minutes. The tested assembly was inserted in the reservoir of mineral oil L-AN 46. It was found that the dimple presence on block surface reduced the friction coefficient substantially compared to non- extured turned surfaces. The area density of dimples smaller than 15% (particularly 4.5% and 6%) was beneficial.
Przeprowadzono badania tribologiczne w układzie rolka-klocek. Powierzchnie klocka (wycinka pierścienia) z brązu CuSn10P o twardości 138 HB zawierały sferyczne kieszenie smarowe uzyskane metodą wygniatania. Rolki wykonano ze stali 42CrMo4 o twardości 40 HRC. Badania tribologiczne przeprowadzono przy stałym obciążeniu normalnym wynoszącym 900 N i zwiększającej się prędkości ślizgania w zakresie 0,08–0,82 m/s, utrzymywanej w czasie dwóch minut. Skojarzenie trące smarowano olejem L-AN 46 znajdującym się w zbiorniku. Stwierdzono, że teksturowanie powierzchni klocka spowodowało istotne zmniejszenie oporów tarcia w porównaniu z parą cierną zawierającą gładkie powierzchnie, szczególnie przy niewielkich stopniach pokrycia wgłębieniami (4,5 i 6%).
Źródło:
Tribologia; 2018, 279, 3; 69-76
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser modification of the materials surface layer - a review paper
Autorzy:
Kusiński, J.
Kac, S.
Kopia, A.
Radziszewska, A.
Rozmus-Górnikowska, M.
Major, B.
Major, L.
Marczak, J.
Lisiecki, A.
Powiązania:
https://bibliotekanauki.pl/articles/201655.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lasers in Poland
laser surface heat treatment
laser melting
alloying
cladding
laser ablation
laser cleaning
laser shock processing (LSP)
laser texturing
multilayer coatings
Opis:
The state of laser processing in surface materials modification in Poland is reported, based on own experience, coworkers and coauthors results, as well the literature review. The curriculum concerning historical development of lasers and laser technology in Poland, laser-matter interaction, as well basis of different laser techniques applied in materials surface engineering (solid state hardening, melting, alloying, cladding, ablation, shot peening, cleaning and texturing) are reviewed, and compared with results of coauthors, as well with a wide range of Polish authors papers. Finally, it is concluded that overall state of research on laser application in surface engineering in Poland is well developed and still growing industrial application is observed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 711-728
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
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