A complete study is presented on the response of thermoplastic and composite materials for bearing cages bogie trains rail applications to aging conditions in presence lubricants. Glass Fiber reinforced Polyamaide 66 (GF PA66) proposed as commercial material already used field while Polyether Ether Ketone (PEEK) novel polymeric candidate due its chemical stability high mechanical performance. Accelerated tests were performed analyze these external agents under different conditions....

The paper presents the study of influence mechanical damage on safe operation gas transmission pipelines. main types pipeline with actual parameters and their operational are analysed. damaged fractures section Kaunas (Lithuania)–Kaliningrad (Russia) were investigated in laboratory. characteristics structure pipeline’s metal after period long-term determined using various research experimental methods. was modelled by Finite Element Method ANSYS code. predictions failure pressure made,...

This paper focuses on the microstructural characteristics of non-alloy structural steels with carbon contents below 0.3% (further—Low-Carbon Steel—LCS), as well possible transformations and resultant mechanical properties attainable through conventional heat treatment or alternative surface methods. The principal constituents that govern these include both equilibrium non-equilibrium phases, such martensite, retained austenite, sorbite, troostite. Conventional methodologies for enhancing...

The present study offers an experimental investigation into the welding of Cu–Nb wire using upset resistance welding. aim is to examine structure, as well electrical and mechanical properties, conductor joints produced by this method, which are intended for use in coils pulsed magnetic systems. Analysis joint structure revealed that it was free from defects. welded demonstrated a negligible change while retaining sufficient ultimate strength plasticity comparable base material. tensile...

In the present study, pulsed laser post-processing was applied to improve properties of thermally sprayed NiCrCoFeCBSi/40 wt.% WC coatings. The powder mix deposited onto a mild steel substrate by flame spray method and then as-sprayed coatings were processed Nd:YAG laser. peak power density between 4.00 × 106 5.71 W/cm2, operating speed ranged 100 400 mm/min, providing processing in melting mode. Scanning electron microscopy, energy dispersive spectroscopy, Knop hardness measurements,...

Foodborne pathogens are frequently associated with risks and outbreaks of many diseases; therefore, food safety processing remain a priority to control minimize these risks. In this work, nisin-loaded magnetic nanoparticles were used activated by alternating 10 125 mT (peak peak) fields (AMFs) for biocontrol bacteria Listeria innocua, suitable model study the inactivation common foodborne pathogen L. monocytogenes. It was shown that innocua features high resistance nisin-based bioactive...

This paper presents the results of computer simulations and experimental studies, aiming to increase mechanical strength sheet metal parts manufactured from high‐quality structural carbon steel by means local laser processing. The effects processing on plates their ability resist bend load after treatment were studied. bending experiments elastoplastic deformation establish that with surface melting can be used elements made thin C22E decrease its deflection under similar workload, as an...

Systems generating strong magnetic fields are widely used in modern fundamental and applied research as well the most innovative industrial processes. These devices generate that reach 5–100 T conductors subjected to a huge Lorentz force, so conductor material must be extremely (UTS ≥ 700 MPa) have good specific electrical conductivity (IACS 60%). Since traditional such copper, aluminum, gold, silver cannot withstand loads, microcomposite materials been developed characterized by high...

Abstract The laser welding of copper‐niobium microcomposite wires was investigated. It determined that the joint structure does not have defects, while microscopic examination cross‐section showed microstructure autogenous weld consists mainly a copper‐based solid solution strengthened by niobium‐rich precipitations. obtained with use filler material two distinct zones, which are formed due to melting wire and wire. This provides an insignificant increase in electrical resistance sufficient...

Quality analysis of welded and soldered joints Cu-Nb microcomposite wires has been performed. mechanical characteristics as ultimate tensile stress limit elongation at break were measured with an universal testing machine controlled visually using optical microscope. Two silver copper solders put into steel sleeve respectively. Another two solder without any reinforcement. Joints the have demonstrated best characteristics: 650 MPa 0.85 %. no advantages comparing butt joint. Ultimate in 300 -...

Recently, metal selective laser sintering (SLS) techniques have attracted lively interest as a promising technology, which offers number of unique applications in manufacturing parts with complex internal structure and geometry. However, unsatisfactory surface properties as-manufactured SLS cause high cost finish processing restrict wider application products. The paper presents results the study, was taken to evaluate capability improve quality manufactured from powder maraging steel 1.2709...

Low-cost experimentaL faciLity for evaLuation of the effect dynamic mechanicaL Loads on photovoLtaic moduLes tanie urządzenie doświadczaLne do oceny wpływu dynamicznych obciążeń mechanicznych na moduły fotowoLtaiczneThe efficiency modern photovoltaic systems is strongly reduced when crystalline structure solar cells being damaged due to extensive mechanical stress caused by climatic factors such as heavy wind or snow.This work focused investigation cyclic loads required alter typical panels...

In the present work, experimental study on laser processing of additively manufactured (AM) maraging steel part surface was conducted. Nanosecond pulsed at ablation mode used for modification in oxidizing atmosphere. The morphology, roughness, elemental and phase composition, microhardness tribological properties processed surfaces were investigated. obtained results revealed that under air allows obtaining modified with uniform micro-texture insignificant residual undulation, providing 3...

BACKGROUND:In this paper a method is proposed to evaluate the heart's coronary vessels' status based on elimination of large branches from IR-thermal image. This makes it possible determine nutrient cardiac blood circulation by calculation rate heat spreading in sma ll vessels myocardium at hypothermia and hyperthermia under conditions artificial circulation. OBJECTIVE:The objective includes theoretical substantiation for evaluation an experimental investigation efficiency method. METHODS:In...

A method for the preliminary processing of MRI images heart that allows elimination fluctuation and impulse noise from useful signals is proposed. These types are due to regular geometric structure photoelectric elements scanner matrix signal transmission channel. The aim this work develop a comprehensive mathematical model eliminating in an scanner. In work, models linear median filtering noise, fluctuation, implemented. consist combined use filters recording heart. experiments, real six...

This paper is devoted to investigating numerically, by finite element analysis (FEA), and analytically the influences effects of laser processing surface thin-plate, low-carbon structural steel. The plate mechanical properties-axial flexural stiffnesses, force-deflection behavior cross-section force-strain behavior-are investigated after different treatments. An analytical methodology estimation area laser-processed metal also proposed in present article, that can be applied choosing...

The influence of thermal cyclic overloads on mechanical properties winding conductors was investigated. Copper-niobium microcomposite, soft and hard pure copper wires were conditioned at temperatures range from 77 K to 500 K. treatment done during 100 cycles fast conductor cooling liquid nitrogen temperature further heating in a climatic chamber. ultimate tensile stress limit the elongation failure metal-matrix copper-niobium measured before after with testing machine room temperature.

In the present work, plasma-spray technology was applied as a means to improve durability of Al-Mg alloy parts.NiCrSiBFe coatings deposited on aluminium-magnesium substrates with different thickness values were studied.Before spraying, surfaces modified upon applying surface pre-treatment methods.The phase composition, microstructure, microhardness, porosity and adhesion characterized.Ball-on-plate wear tests NiCrSiBFe carried out in dry lubricated conditions, using scanning electron...

BACKGROUND: Monitoring of temperature changes and accurately determining the moment electrode removal during open heart operations is not well recognized. OBJECTIVE: We investigated fields distribution in biological tissues affected by electrosurgery upon use an infrared t hermograph. METHODS: The dynamics tissue was registered thermal imaging camera FLIR i7. Measurement between couples carried out for two operation modes: coagulation (100% power) (50% power). RESULTS: most important result...

In the paper, an opportunity for development of multichannel transcutaneous raster matrixes sensors oxygen on basis electrochemical cell sensor is described. An analysis influence heat sources distribution temperature pattern a matrix had been carried out, and their optimum configuration found. The application such will enable one to obtain information about partial pressure from skin cover object research in dynamics, assess its functional health more comprehensive way control effect...

As dogs are considered valuable members of many families, ensuring their health and well-being is essential. This study introduces a numerical nonlinear model that explores the complexities canine vertebrae, with specific focus on experimentally observed mechanical properties. The underwent rigorous testing, its results were compared actual data compression lumbar vertebrae. experimental comparison had 12% RRMSE. research enhances our understanding bone lays groundwork for future initiatives...