Krzysztof Dziedzic

Lublin University of Technology · Electrical Engineering and Computer Science Faculty

A great number of virtual museums exhibit archaeological artifacts in an interactive form using 3D digital models to disseminate them to as many users as possible. Currently, 3D models obtained as a result of scanning museum objects have gained a great popularity. This technique allows to faithfully reproduce objects and to expose artifacts too del...

A great number of virtual museums exhibit archaeological artefacts in an interactive form using 3D digital models to disseminate them to as many users as possible. Currently, 3D models obtained as a result of scanning museum objects have gained a great popularity. This technique allows to faithfully reproduce objects and to expose artefacts too del...

3D optical scanning method, is employed to digital shape and geometric dimension analysis of fuel tanks. The following paper presents the application possibilities of the optical 3D measurement method for measuring and archiving dimensions of geometrically complex parts, on the example of a passenger car fuel tank in local company. Based on the con...

The main purpose of this work was to compare two game engines (Unreal Engine and Unity) in creating virtual exhibitions. The article is a scientific description of a test of their efficiency. For the needs of the research two identical test applications built on the basis of the same assets were created. Those applications enabled researchers to ex...

The ongoing SARS-CoV-2 pandemic has significantly affected the education process of young people in primary, secondary, and tertiary education, as well as those who improve their competences through various courses and trainings. The practically incessant lockdown in education has resulted in a situation in which distance learning, which most often...

3D printing of historic architectural objects reduces the entire digital model by up to 200 times. With this scaling of the digital 3D model, many important architectural and decorative details are lost, and some elements lose their stiffness. Printed 3D models are now used to create specialised museum exhibitions that allow visitors to get to know...

The wear resistance of diffusion coatings in conditions of specific pressures of 3, 7 and 10 MPa was studied. The boride coatings were prepared by means of diffusion methods using C45 steel as the substrate material. Research on the microstructure and redistribution of chemical elements on wear surface of a borided layer was carried out. It was fou...

The article concerns the comparison of tribological properties of polymer composite PA6G with oil at ambient and elevated temperatures. Tribological tests were carried out at ambient temperature and elevated temperatures of 80 °C and 120 °C. The study used a high-temperature tribotester THT 1000 Anton Parr. The tests were conducted in accordance wi...

This paper investigates the friction process between an Fe-based coating and C45 steel with surface-active lubrication, as well as examines the coating surface before and after tribological testing. As a result, it is possible to determine whether the surface undergoes self-organization during friction. Coatings were produced by hardfacing a subeut...

Modern IT and teaching solutions are increasingly used in the distance learning process. The introduction of game elements in the e-learning allows to increase the interest and motivation of the user when performing tasks. The "Quizer" e-learning platform has been designed to create interactive multimedia courses with elements of gameplay, includin...

Phenomena occurring in the contact area between two mating bodies are characterised by high complexity and variability. Comparisons are usually made between parameters such as the coefficient of friction, friction force, wear and temperature in relation to time and friction path. Their correct measurement enables the proper evaluation of tribologic...

The availability of 3D scanning devices allows to perform the process of digitisation of a growing number of diverse museum artefacts. After the properly conducted processing of the acquired point cloud, we get a photorealistic digital copy that can be presented in many ways. With regard to objects from archaeological excavations, the vast majority...

This paper evaluates the wear characteristics of hardfacing coatings. Regenerative hardfacing coatings were applied with the method TIG (Tungsten Inert Gas) The solid welding wires were used to obtain the coatings marked as: EL-500 HB, EL-650 HB, EL-3348 of Most. Tribological analysis of samples was conducted at room temperature. The wear rate was...

This paper investigates properties of single- and double-layer pad coatings deposited on cultivator points. The coatings were deposited by manual metal arc welding (MMA) with ESAB OK. 84.58 coated electrodes using an inverter welder, DEDRA DESi201. Tribological properties were determined with a THT 1000 tribometer. A ball-on-disc friction pair was...

The aim of the work was to develop a computer program that allows identification of polymer materials that are used in 3D printing technology. The computer program was made using the algorithm that concerns the method of thermal polymer degradation. Filament samples were prepared for this purpose and then set on fire. The collected data on the flam...

This paper presents the use of computed tomography for the evaluation of hardfacing. The method used in this research is hardfacing by tungsten inert gas using alloy wires of wear resistant layers. This paper discusses the latest materials used for hardfacing and their application. It characterizes the defects of obtained hardfacing and impact of t...

The paper presents the results of a SEM/EDS and XPS study of changing of chemical and phase composition of the friction surfaces Fe-Mn-C-B-Si-Ni-Cr hardfacing coatings depend on depth. The tribological examination was conducted in a pin-on disc system with unitary pressure of 10 MPa under dry friction conditions. A scanning electron microscope SEM/...

The results of tribological studies on Fe–Mn–C–B eutectic coatings alloyed with Si, Ni, and Cr are presented. The coatings are produced by gas metal arc welding with use of powder wires (2.4 mm in diameter). Multicriterion assessment is used to analyze the tribological properties of the coatings and determine the most wear-resistant one. This asses...

The paper presents an analysis of the surface layer of Fe-Mn-C-B-Si-Ni-Cr alloy coating after friction with C45 steel. The coatings were obtained by arc welding (GMA). Flux-cored wires were used as a welding material. The flux-cored wires had a diameter of 2,4 mm. The tribological assessment was performed with the Amsler tribotester under dry frict...

The physical and mechanical properties of HS6-5-2 steel after nitriding, carbonitriding, and carbonitriding with oxidation are studied with the help of a modern environmentally safe Zero-Flow method. The one-component atmosphere of ammonia (NH3) is used for the surface hardening. The temperature of the realized processes does not exceed 570°C. Afte...

The quality control of hardfacing is one of the areas where non-destructive testing is applied. To detect defects and inconsistencies in the industrial practice one uses the same methods as in the testing of welded joints. Computed Tomography is a type of X-ray spectroscopy. It is used as a diagnostic method that allows to obtain layered images of...

The paper includes an assessment of the tribological properties of mineral and synthetic Lotos oil marked SAE 15W/40 and SAE 5W/40 at ambient temperature and 100 ̊C. The evaluation was based on the analysis of the tribological properties of friction couple consumables. Tribological tests were performed using the Anton Paar THT 1000 high temperature...

The paper reviews the process of surface layer development with the use of carbonitriding and carbonitriding with oxidation. Employed for that purpose was a modern and ecological method called ZeroFlow. Research was carried out using HS 6-5-2 steel. Single-component nitrifying atmosphere of ammonia NH3 was applied. The temperature of the processes...

Tribological behaviour of coatings obtained from eutectic alloy Fe-Mn-C-B-Si-Ni-Cr was studied. The coatings were obtained by the method of gas metal arc welding (GMA) with use of powder wire. GMA welding method is widely used for the regeneration of machine parts. Eutectic Fe-Mn-C-B-Si-Ni-Cr alloys can be used to obtain high quality coatings resis...

W artykule przedstawiono wykorzystanie metody tomografii komputerowej CT (ang. Computed Tomography) do oceny powłok napawanych. Do otrzymania napoin wykorzystano metodę napawania elektrodą nietopliwą w osłonie gazowej TIG (ang. tungsten inert gas) z wykorzystaniem stopowych drutów do napawania powłok odpornych na zużycie o nazwach handlowych: EL-50...

The paper reports a selection of numerical and experimental results of a new closed-die forging method for producing AZ31 magnesium alloy aircraft brackets with one rib. The numerical modelling of the new forming process was performed by the finite element method.The distributions of stresses, strains, temperature and forces were examined. The nume...

An important characteristic of industrial robots is their accuracy. It is of particularly importance in high-precision tasks, e.g. mounting or machining of elements. In order to meet the requested quality demands for products, as well as appropriate working conditions, it is absolutely essential to regularly inspect the technical condition of robot...

The paper assesses the tribological properties of hardfacing coatings produced by gas metal arc welding. Flux-cored wires were used as a welding material. The core mixture was based on the Fe-Mn-C-B-Si-Ni-Cr alloy. Seven types of flux-cored wires with different compositions were prepared. The flux-cored wires had a diameter of 2.4 mm. The tribologi...

The aim of the present dissertation is the assessment of technical shear resistance (technological shear) of orthopedic screw made of titanium alloy Ti6Al4V, produced using incremental technology in the process of 3D printing process. The first part of the work presents incremental techniques in production engineering. The second part of the presen...

The paper presents the evaluation of tribiological properties and condition of the tool steel surface for hot work 55NiCrMoV6 (WNL). Due to the fact that the steel 55NiCrMoV6 is used for components operating at high temperature, the tribological tests were performed at the room temperature as well as higher temperature (150 °C). The wear tests were...

The subject of this study is the analysis of vibrations induced during milling of a thin-walled element. The milling was performed with a 2-flute custom end mill for machining Al alloys (FENES, 12x22x80-45°W-Z2), diameter d=12 mm. The rectangular 7075-T651 aluminium alloy workpiece of the following original dimensions: 120x60x12, was machined in a...

Computer animation has a positive effect on memorizing knowledge by students. Used in the process of teaching of technical subjects, it is conductive to the development of mind. Animation allows to familiarize the students with the schemes of solving technical problems and shows the mode of operation of machinery and equipment. In the technique, an...

Computer 3D modelling allows designing or mapping objects and then their photorealistic visualization. In the programs for creating 3D graphics a user often loses judgement as to which technique to use during the process. It is also a major problem in teaching graphics, because the final result can be obtained by various methods using tools availab...

The paper discusses the production and properties of wear-resistant eutectic coatings in the Fe–Mn–CB–Si–Ni–Cr system. The coatings are produced by gas metal arc (GMA) welding in a protective argon atmosphere with use of powder wires (2.4 mm in diameter). After wear-resistance tests, the phase composition, microstructure, distribution of elements,...

Purpose: The analysis of numerous phenomena that concern the possibilities of metal surface self-organizationin friction and corrosion processes.Design/methodology/approach: The design of structural materials resistant to wear and corrosion.Findings: The paper presents the surface self-organization process of composite materials. The surface showsc...

Purpose: The purpose of the study is to reveal the manner of improvement, extension of possibilities and increase of effectiveness in conducting research with the use of Amsler machine.Design/methodology/approach: In order to reach the goals further actions were provided:• The replacement of mechanical measuring unit with electronic meter circuit w...