IF 5.3 1区工程技术

Wear Pub Date : 2024-07-26 DOI: 10.1016/j.wear.2024.205515

{"title":"Study on the wear characteristics of a 3D printed tool in flat lapping of Al2O3 ceramic materials","authors":"","doi":"10.1016/j.wear.2024.205515","DOIUrl":"10.1016/j.wear.2024.205515","url":null,"abstract":"<div><p>Widespread and popular use of ceramic products in various industry sectors necessitates the search for methods of their efficient processing. Lapping technology, which enables obtaining high dimensional and shape accuracy and high surface flatness, is one of the basic methods of finishing hard and brittle technical ceramics with a porous structure. This study analyzed the characteristics and wear value of an SLS-printed abrasive tool intended for single-sided lapping of Al<sub>2</sub>O<sub>3</sub> technical ceramics. As earlier research demonstrated, introduction of a 3D printed lapping plate by selective laser sintering (SLS), leads to a significant development in the field of precision machining technology. This method showed not only efficient machining performance on oxide technical materials, but was also characterized by relatively low abrasive wear. Straightness errors were evaluated with the use of a least-squares method (LSQ) and minimum zone method based on control line rotation scheme (CLRS). The proposed model proved the experimental results by identifying a similar location of a higher contact density on the lapping tool, where this location is expected to be the one for bigger wear. Surface topography of the lapping tool depends on the tool wear intensity and as a consequence on its shape error. An SLS-printed lapping plate, by obtaining good technological effects, revealed its potential ability in machining hard and brittle technical ceramics.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0043164824002801/pdfft?md5=6f52bf519199631cbcdb0835a27fa029&pid=1-s2.0-S0043164824002801-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141853677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of tribological performance of the ultra-dispersive TBC-CNTs as additives for aqueous lubrication 超分散 TBC-CNT 作为水性润滑添加剂的摩擦学性能研究

IF 5.3 1区工程技术

Wear Pub Date : 2024-07-25 DOI: 10.1016/j.wear.2024.205513

{"title":"Investigation of tribological performance of the ultra-dispersive TBC-CNTs as additives for aqueous lubrication","authors":"","doi":"10.1016/j.wear.2024.205513","DOIUrl":"10.1016/j.wear.2024.205513","url":null,"abstract":"<div><p>Carbon nanotubes (CNTs), as water-based additives, are potential candidates for reducing friction and wear whereas the weak dispersion stability impedes their application in aqueous lubrication. Therefore, CNTs were functionally modified by 4-tert-butylcatechol (TBC) nucleophilic for synthesizing the ultra-dispersive TBC-CNTs. The particle sizes and dispersibility of TBC-CNTs in water were investigated. It was found that particle sizes of the most of CNTs were reduced after modification and 0.035 wt% TBC-CNTs remained uniformly dispersed in water for 2 months. The lubrication behavior of TBC-CNTs as water-based additives for ceramic/steel tribo-pairs was investigated by using a ball-on-disc apparatus. Notably, the optimum concentration of TBC-CNTs was determined 0.2 wt% that contributed to 30.6 % of friction reduction and 28.3 % of wear resistance, respectively, at 0.6 m/s and 8 N. The tiny structure of TBC-CNTs contributed to their entrance into the contact interface and playing lubricating roles. Furtherly, the increase of water film thickness within contacts and formation of lubrication film on rubbing surfaces caused by TBC-CNTs addition resulted in the friction and wear reduction.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141885011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation and modelling the wear resistance of plough points and knife coulters by discrete element method 用离散元法估算和模拟犁尖和刀槽的耐磨性

IF 5.3 1区工程技术

Wear Pub Date : 2024-07-25 DOI: 10.1016/j.wear.2024.205508

引用次数: 0

Tribology and airborne particle emissions from grey cast iron and WC reinforced laser cladded brake discs 灰铸铁和 WC 增强激光包覆制动盘的摩擦学和气载颗粒排放

IF 5.3 1区工程技术

Wear Pub Date : 2024-07-25 DOI: 10.1016/j.wear.2024.205512

{"title":"Tribology and airborne particle emissions from grey cast iron and WC reinforced laser cladded brake discs","authors":"","doi":"10.1016/j.wear.2024.205512","DOIUrl":"10.1016/j.wear.2024.205512","url":null,"abstract":"<div><p>Laser cladding (LC) is a promising technique to overlay a protective coating on grey cast iron (GCI) brake discs to enhance the wear and corrosion resistance. This study utilized a pin-on-disc tribometer in an aerosol chamber to investigate the tribology and airborne particle emissions from tungsten carbides (WC) reinforced coating overlayed onto GCI substrate through laser cladding. Uncoated GCI brake discs served as reference material, while low-metallic (LM) and non-asbestos organic (NAO) brake pads were used as counterparts. The results indicate that LC coating exhibited slightly higher coefficient of friction and significantly lower wear than uncoated GCI discs. Abrasive wear is the dominant wear mechanism for both uncoated GCI brake discs and LC coatings. LC coatings substantially decreased the particle mass concentrations. All three friction pairs displayed a mass weighted size distribution with a major peak around 2–3 μm. The number size distribution was dominated by a mode below 1 μm. Emissions by number were generally low. Meanwhile, all three friction pairs emitted sheared off and agglomerated particles, with iron being the dominant element. Tungsten was identified in the particles emitted from LC coatings, indicating that the hard coating has a potential to wear off and become airborne particles.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0043164824002771/pdfft?md5=70b5ea0ad7155aa4555e43a35d588349&pid=1-s2.0-S0043164824002771-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on friction and wear properties of new energy micro logistics vans brake materials under different ambient temperature and humidity conditions 新能源微型物流车制动材料在不同环境温湿度条件下的摩擦磨损性能研究

IF 5.3 1区工程技术

Wear Pub Date : 2024-07-24 DOI: 10.1016/j.wear.2024.205511

{"title":"Research on friction and wear properties of new energy micro logistics vans brake materials under different ambient temperature and humidity conditions","authors":"","doi":"10.1016/j.wear.2024.205511","DOIUrl":"10.1016/j.wear.2024.205511","url":null,"abstract":"<div><p>This study explores the friction and wear performance of brake materials for new energy micro logistics vans under different ambient temperature (3 °C, 23 °C, 43 °C) and humidity conditions (35 %, 65 %, 95 %) using pin-disc experimental device. The findings reveal that at 3 °C, the friction coefficient exhibits extreme sensitivity to changes in humidity, with a significant reduction as humidity increases. Simultaneously, the increase of humidity leads to the transition from adhesive wear to abrasive wear and fatigue wear. At room temperature (23 °C) and 43 °C, humidity has minimal impact on the friction coefficient; however, higher humidity promotes oxidation film formation on the friction surface leading to dominant oxidation wear. Notably, in low-humidity environments, temperatures at 3 °C and 43 °C cause severe brake pad wear. The severity is greater at 43 °C because the resin-based components within the brake pad material decompose at elevated temperatures. Under such circumstances, appropriately increased humidity helps mitigate brake pad wear rates. However, too much humidity can increase fatigue wear of brake pad materials.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141839612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The evolution process of fluting damage on bearing outer races during rolling with a shaft current 轴电流轧制过程中轴承外圈凹槽损伤的演变过程

IF 5.3 1区工程技术

Wear Pub Date : 2024-07-23 DOI: 10.1016/j.wear.2024.205502

引用次数: 0

Fully coupled thermo-mechanical-wear analysis for brake interface of high-speed train 高速列车制动接口的热机械磨损全耦合分析

IF 5.3 1区工程技术

Wear Pub Date : 2024-07-23 DOI: 10.1016/j.wear.2024.205510

{"title":"Fully coupled thermo-mechanical-wear analysis for brake interface of high-speed train","authors":"","doi":"10.1016/j.wear.2024.205510","DOIUrl":"10.1016/j.wear.2024.205510","url":null,"abstract":"<div><p>The tribology behavior of the brake interface is a vital aspect since it determines the service life and operation safety of the train. To be more understanding about this, a fully coupled thermo-mechanical-wear finite element algorithm is proposed to study the evolution of temperature, wear and mechanical contact at the interface of high-speed train brake systems, and the correctness of which is experimentally validated. In this approach, contact stress is extracted to calculate the interfacial heat flux for the subsequent thermomechanical coupling analysis. Meanwhile, based on the Achard wear model, the interfacial wear degradation under thermal conditions is simulated through ABAQUS subroutine UMESHMOTION with the help of arbitrary Lagrangian–Eulerian (ALE) remeshing technique. Using the proposed method, the dynamic interaction between temperature, wear and contact stress is investigated, and the coupling mechanism between these factors is revealed. The results indicate that the temperature magnitude will be overestimated without considering the wear effect. In reverse, the thermal expansion has a significant influence on the wear and contact behavior. The interfacial contact behavior is jointly influenced by surface wear and thermal effects. Therefore, it is impossible to accurately predict the tribology behavior of the brake interface without a comprehensive consideration of these factors.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141852974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evolution features and a prediction model of casing perforation erosion during multi-staged horizontal well fracturing 多阶段水平井压裂过程中套管射孔侵蚀的演变特征和预测模型

IF 5.3 1区工程技术

Wear Pub Date : 2024-07-23 DOI: 10.1016/j.wear.2024.205509

{"title":"Evolution features and a prediction model of casing perforation erosion during multi-staged horizontal well fracturing","authors":"","doi":"10.1016/j.wear.2024.205509","DOIUrl":"10.1016/j.wear.2024.205509","url":null,"abstract":"<div><p>Large-displacement high-intensity sanding hydraulic fracturing operations often cause casing perforation erosion and thus temporary plugging failures, exacerbate the unevenness of fracture initiation and expansion, and induce casing damage. In order to clarify the dynamic evolution of perforation erosion and predict perforation diameter, the effects of different types of proppants, the viscosity of sand-carrying liquids, and large sand-passing quantities on perforation erosion rate were experimentally explored in the study. The evolution of perforation erosion and the particle size distribution of quartz sand and ceramsite were analyzed in the experiment and a prediction model for perforation erosion under various fracturing parameters was established. Compared to ceramsite, quartz sand had the more significant effect on perforation erosion and the more serious particle abrasion and fragmentation under the same sand-passing quantity. Increasing the viscosity of the sand-carrying liquid slowed down perforation erosion and made the edge of perforation entrance more uniform. As the sand-passing quantity through the perforation increased, perforation erosion in the initial stage was concentrated at the perforation edge. Then, the inner wall of the perforation was also eroded, but the average erosion rate was reduced. A prediction model of perforation erosion considering multiple fracturing parameters was established based on the principle of fluid similarity. The errors between predicted values and downhole eagle-eye observation values were less than 15 %. The model provides an important basis for the optimization of fracturing parameters and downhole casing strength design.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scratching properties of 4H–SiC single crystal after oxidation under different conditions 不同条件下 4H-SiC 单晶氧化后的划痕特性

IF 5.3 1区工程技术

Wear Pub Date : 2024-07-23 DOI: 10.1016/j.wear.2024.205503

{"title":"Scratching properties of 4H–SiC single crystal after oxidation under different conditions","authors":"","doi":"10.1016/j.wear.2024.205503","DOIUrl":"10.1016/j.wear.2024.205503","url":null,"abstract":"<div><p>Single-crystal silicon carbide (SiC) has poor machinability because of its low fracture toughness, and surface modification has become the first choice for SiC polishing to obtain a high removal rate and a smooth surface. However, the removal mechanism of SiC after modification remains unclear. In this study, diamond scratching experiments were performed on 4H–SiC after oxidation under two conditions. To reveal the material removal mechanism, the scratch morphology and subsurface defects were analysed using Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The results showed that oxidation improved the scratch depth and critical depth for ductile removal, resulting in a smooth scratch surface with low damage. However, weak oxidation increased the median crack length and exacerbated the subsurface damage. The SiO<sub>x</sub>C<sub>y</sub>, C = O, C–O–C, and Si–O–Si functional groups produced during oxidation reduced the hardness and improved the machinability of the 4H–SiC substrate. On the other hand, strong oxidation reduced the generation of surface cracks, tearing, and spalling, and weakened the propagation of subsurface median cracks. These results prove that ultrasonic-assisted photocatalytic oxidation provides high removal efficiency and defect control, providing a new approach for the synergistic polishing of SiC substrates.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141843815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effects of the angle between the indenter edge and the scratch direction on the scratch characteristics of Ti–6Al–4V alloy 压头边缘与划痕方向的夹角对 Ti-6Al-4V 合金划痕特性的影响

IF 5.3 1区工程技术

Wear Pub Date : 2024-07-23 DOI: 10.1016/j.wear.2024.205507

{"title":"The effects of the angle between the indenter edge and the scratch direction on the scratch characteristics of Ti–6Al–4V alloy","authors":"","doi":"10.1016/j.wear.2024.205507","DOIUrl":"10.1016/j.wear.2024.205507","url":null,"abstract":"<div><p>Ti–6Al–4V alloy has become a crucial raw material in aerospace and other industries owing to its exceptional mechanical properties. However, it is also a typical difficult-to-machine material, and its removal process and mechanism have been widely investigated by scratch testing. Nevertheless, the inherent non-rotational symmetry of the Vickers indenter introduces a crucial parameter, i.e., the angle <em>λ</em> between the indenter edge and the scratch direction, which affects not only the mechanical response of materials but also its surface formation mechanism during scratch. This study systematically characterized the micro/nano scratch characteristics of Ti–6Al–4V alloy under three typical angles <em>λ</em> (0°, 22.5°, 45°) as well as various normal forces and scratch speeds. The coefficient of friction (COF), scratch depth, scratch width, residual scratch morphology, and specific scratch energy were comparatively analyzed. Finite element simulations confirmed that the direction of material flow changed with the change in angle <em>λ</em>. The corresponding deformation mechanisms during scratch were discussed accordingly. The results revealed a significant influence of the angle <em>λ</em> on the scratch behaviors and surface quality of Ti–6Al–4V alloy.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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