Wyniki wyszukiwania - Biblioteka Nauki

1

Tribological properties of textured diamond-like carbon coating

100%

Kalinowski A.

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tom Vol. 120, iss. 1

art. no. e2023004

EN

This paper presents selected mechanical and tribological properties of DLC coatings (diamond-like carbon coatings) and the results of an applied texture to improve these properties under specific circumstances. It presents the results of the selection of parameters for the laser-texturing process of DLC coatings using a picosecond laser with a wavelength of 343 nm.

2

Wytwarzanie i potencjalne zastosowanie powłok węglikowo-ceramicznych

51%

Radek N. , Kalinowski A. , Michalski M. , Szczepaniak M.

Obróbka Metalu

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2021

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tom nr 4

24--31

PL

Przedstawiono rezultaty badań weryfikujących przydatność powłok węglikowo-ceramicznych w zastosowaniach narzędziowych. Badano powłoki WC-Co-Al2O3 oraz WC-Co-Al2O3/3TiO2 nanoszone elektroiskrowo na ostrza noży tokarskich oraz gwintowniki. Stwierdzono zróżnicowaną ich przydatność w obróbce skrawaniem.

EN

The results of investigations verifying the usefulness of carbide-ceramic coatings in tooling applications are presented. The WC-Co-AlO and WC-Co-AlO/3TiO2 electrodeposited on turning knife edgess and threading dies were investigated. Their usefulness in machining was found to vary.

3

Influence of laser texturing on tribological properties of DLC coatings

51%

Radek N. , Tokar D. , Kalinowski A. , Pietraszek J.

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tom Vol. 27, Iss. 2

119--123

EN

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.

4

Laser surface texturing: characteristics and applications

38%

Kalinowski A. , Radek N. , Orman Ł. , Pietraszek J. , Szczepaniak M. , Bronček J.

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tom 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.

5

Numerical analysis of laser-welded flange pipe joints in lap and fillet configurations

32%

Danielewski H. , Skrzypczyk A. , Zowczak W. , Gontarski D. , Płonecki L. , Wiśniewski H. , Soboń D. , Kalinowski A. , Bracha G. , Borkowski K.

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tom Vol. 118, iss. 1

art. no. e2021030

EN

This article presents a numerical analysis of laser-welded flange pipe joints. The presented results concern the welding of low carbon S235JR and stainless 316L steels using a CO2 laser in lap and fillet joint configurations. The estimation of welding parameters was achieved using Simufact Welding software and numerical simulation, where output power, feed rate, efficiency and intensity distribution (Gaussian parameter) were analysed. In accordance with the established model, a thermo-mechanical simulation was performed. The calculated joint geometries show good agreement with experiments; therefore, the obtained results were used to study selected joint properties of both joint types. Stress-strain distribution was estimated on the basis of thermomechanical analysis. Weld bead geometry obtained from numerical simulation was compared with the results from trial joints. The numerical model established for both joint configurations shows good agreement with experimental results and were assumed to be accurate. The results of the performed analysis shown some advantages of the use of this configuration of lap joints in flange pipe joints.

6

Formation of coatings with technologies using concentrated energy stream

32%

Radek N. , Kalinowski A. , Pietraszek J. , Orman Ł. J. , Szczepaniak M. , Januszko A. , Kamiński J. , Bronček J. , Paraska O.

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2022

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tom 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.