Wear - Science topic

The effect of heat treatments on the tribological and microstructural properties of 18Ni-300 maraging steel produced using the AM technique, which allows complex geometries, was investigated. The tribological properties of the samples were examined under dry atmospheric conditions through sliding wear tests at varying loads and speeds while maintai...

Door systems on rail vehicles have to meet high safety requirements and always operate reliably to protect people from danger. If the automatic door control fails in an emergency, it has to be possible to open the door manually. No train is allowed to move, while any door is still open. An automatic door is taken out of normal operation if it no lo...

This paper derives a piecewise linear interpolation representation of grey relational analysis from its algebraic form, laying the mathematical foundation in the metric space of continuous functions. By introducing cubic spline interpolation, a novel functional-type model is proposed, and its geometric invariant properties are thoroughly analyzed....

This paper investigates regenerative chatter and its suppression during the peripheral milling of a flexible, thin plate-workpiece with substantial dimensions and low natural frequencies, a configuration that has not been previously analyzed. A realistic nonlinear cutting force model is proposed, and dynamic equations for a nonlinear cantilever pla...

In recent years, various methods have been developed to enhance the characteristics of asphalt pavement in order to face the continuous challenges of increasing traffic loads and changing climate conditions. One of the most popular and successful methods is modifying the asphalt mixtures or asphalt binder with the addition of polymers. Therefore, t...

To investigate the mechanism and manifestation of ballast spoilage, this study introduces a novel approach using a repeated large-scale direct shear test (involving multiple large-scale direct shear tests on the same batch of ballast aggregates) to simulate ballast degradation. Using advanced three-dimensional (3D) reconstruction technology, we obt...

The rock physics properties of the crushed railway ballast include resistance against breakage and wear. The qualification of such materials and their compliance with requirements is mainly considered by two standard tests: The Los Angeles abrasion and Micro-Deval wear resistance tests. These tests are indispensable for the legally mandatory qualif...

Ecological impacts of tire wear particles (TWPs) on microbial communities and biogeochemical cycles in freshwater remain largely unknown. Here, we conducted a microcosm experiment to investigate interactions between the overlying water and sediment without and with TWPs addition in a rural vs. urban lake system. Our results revealed the degree of c...

In order to guarantee the normal operation of urban rail transit system, the research constructs the fault prediction system of urban rail transit power supply system, analyzes the equipment failure rate under each weather condition, and constructs the Monte Carlo-based traction power supply fault simulation model. After the fault ranging of the tr...

Various industries widely use the internal combustion engine as a type of power machine. The cylinder liners and piston rings are the key components of internal combustion engines. Their wear state directly affects the performance and life of the internal combustion engine. Therefore, numerical simulation and analysis of the wear state of cylinder...

In order to improve the tribological performance of polyamide 11 (PA11) coatings, oil‐containing microcapsules, consisting of the heat‐resistant polysulfone (PSF) as the wall material and the polyalphaolefin 40 (PAO40) oil as the core material, were fabricated by the solvent evaporation method and then incorporated into PA11 coatings via the flame...

Purpose To determine the spectacle wear compliance, impact of myopia and its correction on quality of life of a youthful clinical sample. Methods This study was a prospective cohort design at two eyecare facilities in Cape Coast, Ghana. The National Eye Institute 25-Item visual function questionnaire was used to assess Quality of life prior to spe...

Physical phenomena at various scales are involved in energy dissipation and material degradation induced by mechanical contacts. Stress computation at the microstructural level is particularly valuable for the study of rolling contact fatigue or wear. For this purpose, a new efficient and versatile numerical model based on the Green-FFT method is p...

Motion sickness, better known as motion sickness, is a common and complex syndrome that occurs in response to real or perceived movement. The objective of the study is to test the effectiveness of motion sickness goggles in individuals who have proven to have this condition and are not taking medications to prevent any symptoms of the disease. This...

Background In this study, we implemented an indoor positioning system to track the activities of healthcare professionals during their shifts in an emergency department, aiming to gain a better understanding of the emergency care production process. Methods An ultrawideband-based tracking system was used in an experiment at the emergency departmen...

Maintenance of transmission towers and substations requires professionals to wear safety equipment, so the use of safety equipment is critical to life safety. However, current safety equipment inspection technologies face limitations in detection accuracy and inspection content diversity. Motivated by this, this paper proposes an improved HAF-YOLO...

Lesion of the oral mucosa associated with wearing of removable dentures may represent with acute or chronic reactions. Few oral carcinomatous lesions have possible association with the wearing of the denture. The purpose of the study is to elicit the response of the oral soft tissues in patients rehabilitated with complete removable prosthesis. Thi...

Accurately identifying tool wear states with variable cutting parameters can improve machining quality and efficiency. However, existing wear state recognition methods based on unsupervised domain adaptation mostly employ the knowledge transfer learning strategy in a single source domain. They cannot fully utilize the sensor data distribution infor...

Surface laser processing of metallic materials is known to be effective in improving wear resistance due to microstructure refinement and the associated hardening effect. However, the formation of cracks, which frequently accompanies such processing, remains a challenge. This work focusses on partial laser processing of Ni-based protective coatings...

The distribution of ceramic particles in the matrix plays a crucial role in enhancing the properties of aluminum matrix composites, especially wear resistance. In the current study, 0.5 wt.% Bi and 0.5 wt.% Sn were added separately to the Al-7Si-Mg matrix metal, followed by an introduction of Al 2 O 3 , ZrO 2, and SiC particles using the compo-cast...

To investigate the effect of the overlap rates on quality, microstructure and mechanical properties of the cladding layer, the Ni40A-WC composite coating on the surface of H13 steel was prepared by laser cladding technology, and the surface morphology, crack defects, microstructure, microhardness, friction and wear of composite coatings with differ...

Valves are critical components in advanced fluid control systems (AFCS) and play a vital role in applications such as soft robotics and medical devices. Traditional mechanical valves often suffer from issues such as leakage and wear, which compromise the efficiency and precision of air‐driven systems. Here, a superlubricity microvalve (SLMV) is dev...

There is limited empirical evidence regarding the differences in maintenance costs across units and building types and how much tenant wear and tear contribute to these costs. Yet, certain residential buildings are costlier to operate, and anecdotal evidence suggests some tenants are responsible for higher maintenance costs during their tenancy and...

For the study, researchers selected reinforcing material, along with effective strengthening methods for the knives. These knives were intended to replace similar imported parts from MWS (Germany) on combines produced by Rostselmash plant LLC. During the study, the causes of the dispersion of blanks, wear in real operating conditions were determine...

WC-Co tungsten carbide possesses excellent properties, including high hardness, wear resistance, strength, heat resistance and corrosion resistance, which has led to its extensive utilisation in material forming and metal processing. During the tungsten carbide cutting process, serrated chips often appear, and they can affect cutting force, tempera...

This study systematically explores and expands upon the research questions, revealing the scientific principles and engineering value of chromium–aluminum (Cr-Al) co-diffusion coatings in enhancing high-temperature friction performance. This study addresses the critical need for wear resistance in GH5188 cobalt-based alloy stator bushings operating...

To prevent traffic accidents caused by icy roads in winter and damage to roads resulting from repeated freeze–thaw cycles, this paper proposes an optimized design plan for slow-release anti-icing fog seal. The effects of the dosages of slow-release anti-icing agent, water-based epoxy resin modifier, and penetrant on the ice- and snow-melting proper...

Peristaltic pump units are used in medicine, for pumping blood and its components, and in mechanical engineering for working with aggressive media. The only element in this pump that comes into contact with the working medium is the hose. Such hose characteristics as chemical resistance and wear resistance directly affect the operating life of the...

The tribological performance of Glass Fiber Reinforced Polymer (GFRP) composites is essential for applications in automotive, aerospace, and industrial sectors. This study investigates the effect of fiber weight fraction ratio (wf.) (50%, 65%, and 70%), applied load, and sliding speed on the tribological behavior of twill-woven GFRP using a pin-on-...

This study utilizes equal channel angular pressing (ECAP), also known as equal channel angular extrusion (ECAE), to induce severe plastic deformation in Zn-3% Cu-9%Al (ZCA-9 Al) alloy, resulting in ultrafine-grained structures. ECAP is an unconventional technique used to impart severe plastic deformation to materials, producing ultrafine-grained (U...

Titanium alloy (Ti-6Al-4V) is a difficult-to-machine material, known for its excellent physical and chemical properties. However, traditional machining methods incur high tool wear costs when processing this material. The near-dry electrical discharge milling (N-EDM) method, which removes excess material via electroerosion, mitigates the impact of...

The preparation of titanium alloy/cemented carbide bimetallic laminated composites is expected to integrate the high strength and toughness of titanium alloy with the wear resistance of cemented carbide, presenting significant application potential in national defense and other fields. A key requirement for the application of lamellar composite mat...

Ultra-high-strength steel is primarily used in aerospace transmission gears, where the quality of the ground surface and surface wear resistance significantly influence gear performance. The quality of the ground surface significantly impacts friction, wear behavior, and overall wear efficiency. Ultrasonic vibration composite machining technology e...

With the large-scale integration of wind power, photovoltaic, and other renewable energy sources into the power grid, their inherent randomness and variability present significant challenges to the frequency stability of power systems. Conventional thermal power units with limited frequency regulation capabilities face further strain, as frequent p...

Cemented carbide (WC-Co) combines high hardness, wear resistance, and toughness, making it ideal for tooling applications. This study investigated cryogenic treatment’s effects on the mechanical properties of samples from various suppliers prepared at different scales. Indentation tests were performed to assess the mechanical properties at the micr...

Quality prediction and condition monitoring are crucial for realizing zero-defect intelligent manufacturing. Surface roughness is an important technical indicator to measure the surface quality of parts. In the cutting process, tool wear is directly related to the dynamic change of the surface roughness and the machining efficiency. To enhance data...

Disc cutters are essential for shield tunnel construction, and monitoring their wear is vital for safety and efficiency. Due to their position in the soil silo, it is more challenging to observe the wear of disc cutters directly, making accurate and efficient detection a technical challenge. However, existing methods that treat the problem as a cla...

Underground gas storage reservoirs are vital to China's energy infrastructure, facilitating natural gas peak shaving and supply security. However, cyclic alternating loads from significant pressure fluctuations during injection and production operations lead to severe erosion and wear of tubing strings, complicating safe operation. This study devel...

This research aims to design a high-temperature wear resistance cobalt-based coating of hot-end parts as protective coating. The cobalt-based matrix coatings were reinforced by NiCrAlY and different contents of TiC (6.0, 8.0 and 10.0 wt%) using laser cladding technology. Some efforts were made to explore the influence of TiC on the microstructure,...

Background: Available evidence supports the use of facemasks by all groups to prevent respiratory infections, particularly severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). However, it is not clear whether these masks can be used safely during various intensities of physical exercise.Aim: To evaluate the impact of different types of fac...

Reanalysis of timbers sampled over 20 years ago, as part of a wider dendrochronology project aiming to identify imported American oak timbers in historic buildings, wrecks and other artefacts in the British Isles, has securely dated by ring-width dendrochronology the 302-year site sequence NWCCSQ01 as spanning AD 1508–1809. This means that the timb...

Research on hadith related to perfume often emphasizes the ethical aspects of its use and its implications for personality. However, there has been limited exploration of how these hadiths can serve as tools to prevent sexual harassment and protect women. This study aims to examine the hadith concerning women’s use of perfume from the perspective o...

In present work abrasive wear resistance after heat treatment of a powder steel M390P with composition 1.9 % C, 0.7 % Si, 0.3 % Mn, 20.0 % Cr, 1.0 % Mo, 4 % V and 0.6 % W was investigated. Machine used for laboratory wear tests is a device that allows to imitate friction conditions in the exploataion of objects. Heat treatment consisting of quenchi...

Asphalt pavement skid resistance, governed by surface texture, is critical for traffic safety. Most research has focused on full-depth textural characteristics, often overlooking the depth of tire–pavement contact under real traffic conditions. This study introduces the concept of the Effective Depth of Skid Resistance (EDSR) to describe the effect...

Objective This study compared the Omron Active style Pro HJA-750C (OM) and the ActiGraph wGT3X-BT (AG) in estimating daily physical activity—step counts and time spent in moderate to vigorous physical activity (MVPA)—in free-living adults. Methods Japanese adults without gait abnormalities wore both devices during waking hours for seven consecutiv...

The blanking process is an essential manufacturing technique in the sheet metal industry, widely employed for producing precision components. Increasing global market competitiveness necessitates high-quality output with minimal defects. Small-scale industries often struggle to predict optimal punch-die clearance due to limited skilled operators an...

Citation: Teixeira, M.A.d.; Santos, W.W.d.; Coelho, L.M.; Santana, L.H.d.S.; Ávila, F.G.d.; Monteiro, S.N.; Guimarães, A.C.R. Influence of Ballast and Sub-Ballast Thickness on Structural Behavior of Heavy-Haul Railway Platform Determined by Finite Element Modeling. Constr. Mater. 2025, 5, 13. https://doi. Abstract: This study investigates the influ...

The bearing capacity and structural stability of natural rock mass are mainly governed by the existing weak joint surfaces. Most of the researches focus on the shear mechanical behavior of the joint surfaces under constant normal load (CNL) conditions. However, the mechanical characteristics of rock joints under dynamic normal load (DNL) in earthqu...

To reduce the errors caused by the overall compliance of the system and the machine tool wear during the machining process for curved workpieces, and to improve the machining accuracies of curved workpieces, a machining error compensation method using a compliance error model to reconstruct the surface was adopted. During a process involving multip...

TiNi/Ti2AlN multilayer films are deposited on AISI M2 steel and Inconel 718 substrates using the magnetron sputtering technique. After heat treatment at 750 °C, TiNi and Ti2AlN MAX phase crystal structures are obtained in these films. The effects of different layer numbers on the structural, mechanical, tribological, adhesion, and fatigue propertie...

To investigate the tribological performance of honed cylinder liner and coated piston ring during running-in period under the synergistic effect of surface texture, different surface textures were designed on the cylinder liner and piston ring. The coefficient of friction and worn surfaces were measured using the friction and wear tester and a conf...

Chatter is a common issue during machining operations and significantly affects machining quality. A stability lobe diagram (SLD) is typically used to mitigate chatter. However, the generated SLD needs frequent adjustments due to its susceptibility to various time-varying factors, such as tool wear. In this study, we propose a novel method for gene...

ntroductionAccurate gas flow measurement is critical for custody transfer, process control, andregulatory compliance. Various flow meter technologies are used in the field, each with itsown advantages and challenges. However, measurement errors can arise due toinstallation issues, mechanical wear, environmental factors, and calibrationinconsistenci...

Leadership entails a high level of responsibility, accompanied with stress, which can result in depression. Additionally, multi-tasking leaders have multiple responsibilities and allegiances, and the difficulty of resolving day-to-day issues will almost certainly jeopardise their health and other priorities. Thus, the purpose of this review is to e...

This is the presentation of our latest results, made at the Tire Technology Conference 2025, Hanover, Germany.

Статья посвящена разработке способа проектирования плотнооблегающих изделий повседневного назначения из термохромных трикотажных полотен с имитацией конструктивных эффектов. Использование термохромных красителей позволяет осуществлять имитацию конструктивных элементов одежды, таких как вытачки, рельефы, декоративные элементы (карманы, пуговицы, зас...

Background/Objectives: Preceding studies have reported the efficacy of multifocal contact lenses (MFCLs) in slowing myopia progression. Recently, a novel type of MFCL, i.e., extended depth-of-focus (EDOF) contact lens (CL), was designed. Here, we retrospectively investigated myopia progression associated with EDOF CL wear. Methods: Twenty-four cons...

Extended absence from work due to non-fatal injuries and musculoskeletal disorders negatively impacts a company’s productivity. Exoskeleton devices provide a means to reduce this absence from work by assisting recovering workers to timely and safely return to work. This study investigated and quantified the amount of support and L5/S1 joint load re...

Increasingly stringent requirements for the durability and reliability of ship components and new standards for environmental protection have resulted in the use of increasingly sophisticated technologies in the shipbuilding industry. The components of a ship’s propulsion system have been meticulously analysed and improved over several decades. The...

Purpose To evaluate myopia control efficacy in myopic children wearing spectacle lenses with highly aspherical lenslets (HAL) for 5 years. Methods This is a randomized, double-masked extended trial. Myopic children aged 8 to 13 years who were originally allocated to the HAL group in the 2-year clinical trial. The HAL group underwent a 5-year asses...

The problem of increasing the tool durability (service life) when machining hard-to-machine materials is one of the major practical problems of modern mechanical engineering. This paper aims to improve the wear resistance of modular disk mills using the pre-processing method. Second-order rotatable planning was applied for the experimental study of...

The control of chip formation is a key aspect of modern turning operations, as improper chip formation can negatively affect tool life, surface quality, and overall machining efficiency. One approach to improving chip control is the integration of a chip breaker into the geometry of the cutting tool. This study examines the impact of chip-breaking...

This study investigates the microstructural evolution and dry tribological properties of aluminium matrix composites (AMCs) reinforced with high-entropy alloy (HEA). The reinforced AMCs were produced using the spark plasma sintering (SPS) technique with varying HEA contents (5%, 7%, 10%). Microstructural analysis of the reinforced composites showed...

Throughout the Covid-19 pandemic, face masks emerged as a critical tool to control the virus transmission. While previous studies have investigated the positive and negative attitudes towards the use of face masks when mandatory, our study looks at a different phase: the era of discretionary mask use. Our investigation reached Italian participants...

In order to improve the lubrication performance and reduce tooth surface wear (TSW) of double involute gears (DIGs), this study comprehensively considers the mutual influence relationship between tooth surface wear, gear pair meshing characteristics, and lubrication characteristics. A calculation model for tooth surface wear of double involute gear...

Asphalt pavement has become a vital component of modern highway construction due to its high wear resistance, short construction period, economic viability, and excellent skid resistance. However, increasing traffic volume has heightened the structural performance requirements of asphalt pavement, especially during compaction. The compaction degree...

This paper studies the coatings deposited on a 65G steel substrate by electric arc metallization using a 30KhGSA wire. The properties of the coatings obtained at 30 V, 40 V and 45 V are discussed, including their microstructure, porosity, microhardness, coefficient of friction and corrosion resistance. The experiments showed that the coatings posse...

Bore deterioration phenomena, such as surface ablation, wear, aluminum deposition, and structural bending, severely restrict the service life and performance of electromagnetic launchers. Efficient bore inspection is necessary to study the deterioration mechanism, guide design, and health management. In this paper, an inspection system for electrom...

Fiber-reinforced polyimides were observed to exhibit high brittleness and friction coefficient, hence limit their use for mechanical friction component applications. Thus, in the present study, glass fiber-reinforced polyimide composite containing various nano-TiO 2 additives (0, 2, 4, and 6 wt%) for better mechanical and tribological performance p...

The unconventional machining is an essential role in metal forming process. The dimensional accuracy and super finish are the main features of modern machining methods. Electric discharge machining is a competent process to any materials and composites. In this article is used to machining characteristics of Monel 400 alloy with monitored by comput...

How the shape of asperities affects the wear behavior is still an open question in contact mechanics. This work developed adhesive wear models including the deformable spherical and sinusoidal asperities in contact with a rigid flat by introducing the ductile failure criterion. For spherical asperity, fractures propagating at the corner and then fo...

Background Video laryngoscopes generally increase the success rate of tracheal intubation and clinical outcome compared to traditional direct laryngoscopes. However, there is a concern that their effectiveness can be compromised in bright outdoor environments. The impact of polarized sunglasses on the visibility of a video laryngoscope in a high-il...

Hot deformation tests were performed under various temperature and strain rate conditions to determine the optimal hot working conditions for the Co–Cr–Fe alloy, extensively used in the aerospace industry for its excellent hardness and high wear resistance. The mechanical properties and microstructure observations showed that the flow stress of the...

In everyday tasks, active gaze is used to gather information for the actions we perform. The cognitive resources required for such gaze control have rarely been investigated. We examined how a secondary cognitive load task would affect gaze during tea- and sandwich-making, everyday tasks which involve sequences of object-related actions (Hayhoe in...

The main shaft seal of offshore wind power equipment is one of the key components of wind power systems. However, wear issues between the seals and the main shaft caused by the intrusion of particulate matter in the environment have become a key factor affecting the service life of the equipment. To improve the surface performance of the main shaft...

Gadget is a mini mechanical device or tool or an interesting tool. gadgets have both positive and negative impacts on anyone who wears them. This study is a quantitative study using two variables, namely reading the Quran as an independent variable and Gadget addiction as a dependent variable with a quasi-experimental method with Pretest-posttest c...

The chapter titled “Aerospace and Thin Films” discusses the importance of thin film coatings in the field of aerospace, mainly with regard to aircraft as well as spacecraft. In this chapter, the literature describes the types of advanced coatings that are used in the aerospace industry for the improvement of performance and for increasing the lifes...

Romantic relationship stress is associated with poor sleep quality, theoretically by threatening belongingness needs. However, it is unclear how relationship stress directly and indirectly impacts sleep quality. This study aims to determine to what extent social media use mediates the relationship between romantic relationship stress and objective...

The writer focuses on the personality development that often focuses on how an individual adapts or changes their actions and behavior based on various factors as human. The development is often represented through literature, which reflects real life conditions. This study aims to investigate the personality development and its relation to moral v...

Road damage generally begins with the emergence of small cracks that, if not promptly addressed, lead to more severe damage and reduced road capacity. To mitigate this issue, enhancing the performance of asphalt pavements is crucial. One promising approach is the incorporation of natural polymers into asphalt mixtures. This study investigates the p...

Aluminium alloy (A356) is well-known for its use in automotive structural applications due to its excellent corrosion resistance, superior tensile strength, and lightweight properties. This investigation focuses on enhancing the mechanical and wear behaviour of A356 alloy nanocomposites by incorporating micron-sized barium (Ba) and nano-sized silic...

The effects of 0.12wt%Sr additive on some material properties of Al-12Si+10wt%Zn alloy were examined in this study. Al-12Si+10wt%Zn and Al-12Si+10wt%Zn+0.12wt%Sr alloys were manufactured by permanent mold casting. Microstructures of these alloys were examined with both optic and scanning electron microscopes. Phases in the alloys were identified by...

Currently, Industry 4.0 creates new opportunities for analyzing data on production processes and extracting knowledge from them. With the Internet of Things, data is continuously collected from machine sensors to analyze machine health. Thanks to artificial intelligence methods and discrete simulation, it is possible to process data and dynamically...