Abstract The introduction of solutions conventionally called Industry 4.0 to the industry resulted in need make many changes traditional procedures industrial data analysis based on DOE (Design Experiments) methodology. increase number controlled and observed factors considered, intensity stream size analyzed datasets revealed shortcomings existing procedures. Modifying by adapting Big Data data-driven methods is becoming an increasingly pressing need. article presents current DOE, considers...

The paper analyses the indoor environment in two modern intelligent buildings located Poland. Measurements of air and globe temperatures, relative humidity carbon dioxide concentration 117 rooms carried out space 1.5 years were presented. Thermal comfort occupants has been investigated using a questionnaire survey. Based on 1369 questionnaires, thermal sensation, acceptability preference votes analysed view their interdependency as well dependency operative temperature, which proved to be...

The work presented in this paper determines the influence of laser treatment process on properties electrospark coatings. after were examined by microstructure analysis, microhardness, roughness and adhesion tests. studies conducted using WC–Co–Al2O3 electrodes produced sintering nanostructural powders. anti-wear coatings first deposited an EIL-8A apparatus C45 carbon steel then melted within various parameters. In case Nd:YAG (BLS 720 model) was applied. electro-spark are very promising to...

The paper described properties of electro-spark deposited coatings under influence the laser treatment process.The were assessed by analyzing coating microstructure, X-ray radiation, microhardness, bonding strength, corrosion resistance, porosity and wear tests.The tests conducted for Mo Cu (the anode) which over C45 steel substrate cathode) melted with a beam.The means an ELFA-541.The processing was performed Nd:YAG laser.The after are still distinguished very good performance properties,...

Enhancement of pool boiling heat transfer can be attained with a number passive and active techniques. The paper experimentally analyses the impact laser treatment copper surfaces on distilled water ethyl alcohol. samples were modified beam to produce longitudinal grooves highly developed microstructures in textured area. Specimens different groove depths, widths micro-fin produced. results indicate significant influence processing flux dissipated from enhancement for all tested....

Electro-spark deposition (ESD) and laser beam machining (LBM) are the technologies using concentrated energy flux. This paper deals with issue of impact modification on morphology mechanical properties carbide/copper coatings produced by electro-spark treatment. The were applied to C45 carbon steel samples EIL-8A device. following three types electrodes made powder metallurgy (PM) hot pressing technique, from copper tungsten carbide powders different percentage compositions, used for...

Abstract The work presents the use of laser texturing DLC coatings to improve tribological properties. were applied by PVD method rings made 4H13 steel. surface was performed with TruMICRO 5325c picosecond radiation wavelength λ = 343 nm. microstructure analysis, microgeometry and microhardness measurements tests carried out. problem presented in paper can be used extend knowledge areas application coatings, especially sliding friction pairs.

The main objective of the present work is to determine effects laser processing on properties WC-Co electro-spark deposited (ESD) coatings steel substrates. Tungsten carbide have been applied substrates using a manual electrode feeder, model EIL-8A. beam (LBP) was performed an Nd:YAG fiber laser. microstructure and treated/melted were evaluated by means scanning electron microscopy (SEM), X-ray diffraction (XRD), surface geometric structure (SGS) roughness measurements adhesion,...

The paper analyses thermal comfort in intelligent and traditional buildings Poland. It provides a comprehensive study on the subjective assessment of indoor environment conditions as well parameters that influence human sensations preferences. Direct measurements physical (e.g., air globe temperature, relative humidity) simultaneously conducted anonymous questionnaire studies were used to provide necessary data. covered all seasons large number participants representing various age groups...

The paper analyses thermal comfort of people wearing face masks. study took place in the selected classrooms smart building “Energis” located Poland. In experiments 100 respondents participated. They filled questionnaire forms, which they expressed their subjective assessment indoor environment. Simultaneously, measurements physical parameters within rooms were performed with a microclimate meter. results clearly show that use masks influenced sensations - felt warmer than without mask on...

The main objective of the present work was to determine influence laser treatment on corrosion resistance coatings deposited C45 carbon steel by electro-spark deposition process. studies were conducted using WC-Cu electrodes produced powder metallurgy route. technology uses phenomena electrode material erosion and spark discharge between electrodes, leading formation a surface layer with characteristics different from those substrate. use these protective layers provides optimum corrosion.

In the paper authors presented application of specific method assessment chosen properties coating layer, that give additional information strictly connected with its tribology properties. Nanotomography techniques and 3D image processing gives quantitative qualitative about testing sample, no negative effects on exanimating layer. Two samples, one without laser treatment were tested, measured obtained results discussed. Those preliminary research shown proposed can be recommended to as a...

The electrospark deposition (ESD) is a well-known cheap method utilizing concentrated energy flux to transfer material of an electrode onto the surface machined for enhancing properties its layer. Typically, hard may be deposited materials with lower hardness make such object more robust wearing. Coatings produced by ESD applied protect new elements or recover worn elements. Unfortunately, process produces high roughness. laser beam machining (LBM) has been involved roughness coating made...

This paper discusses the effect of selected parameters laser welding on mechanical properties welds. Two were analysed: speed and power. The material in fusion zone heat affected determined by performing static tensile tests, hardness tests microscopic analysis. was carried out using a TRUMPF Lasercell 1005 CO2 (wavelength λ=10.6 μm). specimens 0.8 mm thickness they made DC04 steel. conducted means LabTest 5.20SP1 universal testing machine designed to determine compressive strengths....

Microstructure and Tribological Properties of DLC Coatings RADEK Norbert, PIETRASZEK Jacek, SZCZOTOK Agnieszka, FABIAN Peter KALINOWSKI Artur Abstract. This paper presents the results diamond-like carbon coatings deposited using physical vapor deposition PVD process on 4H13 stainless steel samples. The properties were assessed by analyzing coating microstructure, nanohardness, roughness tribological tests. […]

The paper explores the possibilities of using carbonyl iron in form a powder for manufacture radar-absorbing paints – reducing radar signature objects that they cover. attenuation values range 4–18 GHz various coating thicknesses, ranging from 0.5 to 2.00 mm with increment, and different absorber content −75% 80%, as well use two binders epoxy resins hardeners, were investigated. For frequency 18 1.5 thick 75% content, Epidian 112 resin Saduramid 10/50 hardener used binder, maximum level...

The aim of this work was to investigate the influence laser treatment for improving mechanical and tribological properties coatings fabricated in C45 carbon steel by ESD process. studies were conducted using WC-Cu electrodes produced sintering nanostructural powders molten with a beam. tests proved that are characterized lower hardness friction coefficient, but higher roughness. result processing improves structure refinement, healing microcracks pores coatings. Laser treated can be applied...

Abstract The primary objective was to test a usefulness of the specific fixed-effect model for analysis quantitative relationships gathered from image material microstructures. dataset obtained investigation turbine blades made superalloy IN713C. based on general linear resulted in informative plots revealing mutual between secondary dendrite arm spacing and mean plane section area carbides material. Directions further research also were obtained.

Abstract A number of modern surface processing methods use an energy flux. The examples include electro-spark deposition (ESD) and laser beam (LBP). work concerns the study Cu-Mo coatings deposited on C45 carbon steel, which were then eroded with a beam. analysis included microstructure, measurements macrogeometry microhardness, corrosion resistance tests selected areas after treatment. applied ELFA-541 subjected to Nd:YAG treatment variable parameters. problem presented in can be used...

The paper presents an analysis of the functional operational properties multilayer coatings for use in military technology field masking. developed coating systems are characterized by innovation due to their small thickness when compared those currently used global defence contractors while maintaining re-emission coefficient required camouflage be effective optical range. Their service life and durability were assessed terms based on measurements attenuation coefficients, surface geometric...

This paper experimentally analyses an indoor environment assessment of a large group respondents regarding their subjective perception overall comfort, air quality and humidity. The questionnaire survey was applied as testing method together with measurements the physical parameters conducted microclimate meter. Two types were analysed: educational rooms climate chamber. comparative analysis sensations experienced within them indicates that they generate quite similar responses; however,...