Tribology Letters最新文献_第2页

In Situ and Ex Situ Analysis of the Reciprocating Sliding Wear Behavior of Cold Sprayed CrMnCoFeNi Cantor HEA Coatings in Dry Air and Ambient Air Conditions 冷喷涂CrMnCoFeNi Cantor HEA涂层在干燥空气和环境空气条件下往复滑动磨损行为的原位和非原位分析

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-30 DOI: 10.1007/s11249-025-02072-2

Maya M. Harfouche, Sima A. Alidokht, Richard R. Chromik

{"title":"In Situ and Ex Situ Analysis of the Reciprocating Sliding Wear Behavior of Cold Sprayed CrMnCoFeNi Cantor HEA Coatings in Dry Air and Ambient Air Conditions","authors":"Maya M. Harfouche, Sima A. Alidokht, Richard R. Chromik","doi":"10.1007/s11249-025-02072-2","DOIUrl":"10.1007/s11249-025-02072-2","url":null,"abstract":"<div><p>This study examined and compared the tribological properties of a cold-sprayed CrMnCoFeNi high entropy alloy (Cantor alloy) coating under ambient and dry air conditions. Tribological testing was conducted using an in situ tribometer equipped with video microscopy, allowing real-time monitoring of the evolution of the sliding interfaces through a transparent sapphire counterface. This experimental setup provided the opportunity to observe phenomena that would otherwise remain concealed between the contacting bodies. The wear rate was 1.8 ± 0.5 × 10⁻<sup>4</sup> mm<sup>3</sup>/Nm in ambient air and 7.5 ± 0.7 × 10⁻<sup>4</sup> mm<sup>3</sup>/Nm in dry air. In dry air, the velocity accommodation mode was characterized by interfacial sliding of a static transfer film against the wear track, resulting in a stable steady-state coefficient of friction (CoF) of 0.5. In contrast, ambient air conditions led to an average CoF of 0.8, with fluctuations attributed to plastic shearing of the transfer film observed in situ. The higher humidity in ambient air inhibited cold welding of wear particles, resulting in a less stable transfer film that underwent removal or extrusion events, which were associated with sudden drops in CoF. Additionally, a “metal debris” oxide formation mechanism was observed in ambient air, contributing to the formation of a protective tribofilm and a reduction in the wear rate. In dry air, the “oxidation-scrape-reoxidation” mechanism dominated, facilitated by the absence of adsorbed water droplets. This resulted in an increased wear rate under dry conditions.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145211042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Defining Scuffing Phases via Friction Evolution and Surface Analysis Through Experiments Using Castor Oil Biolubricant 用蓖麻油生物润滑剂通过摩擦演化和表面分析来确定磨损阶段

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-26 DOI: 10.1007/s11249-025-02073-1

R. H. S. Souza, G. Lasch, A. A. Rodrigues, G. S. Gehlen, L. Y. Barros, J. C. Poletto, P. Stradolini, C. L. Petzhold, N. F. Ferreira, P. D. Neis

{"title":"Defining Scuffing Phases via Friction Evolution and Surface Analysis Through Experiments Using Castor Oil Biolubricant","authors":"R. H. S. Souza, G. Lasch, A. A. Rodrigues, G. S. Gehlen, L. Y. Barros, J. C. Poletto, P. Stradolini, C. L. Petzhold, N. F. Ferreira, P. D. Neis","doi":"10.1007/s11249-025-02073-1","DOIUrl":"10.1007/s11249-025-02073-1","url":null,"abstract":"<div><p>Scuffing is a severe wear mode that occurs under boundary lubrication. This wear mode remains challenging to predict, and no objective criteria have been established in the literature to characterize the evolution of the phenomenon across the distinct phases of frictional behavior. This study proposes a quantitative method to characterize the three typical scuffing phases (stable, incipient, and severe) based on friction force evolution. Block-on-ring tests were conducted using SAE 52100 steel and two biolubricants: pure castor oil (CO) and aminolyzed castor oil (ACO). A mathematical approach was developed by analyzing the variation of friction force (delta friction) across discretized time intervals. Real-time imaging enabled direct correlation between friction behavior and surface damage. SEM/EDS analyses revealed that the material accumulated during severe scuffing consisted of oxidized oil and steel particles. The dynamic of formation and destruction of these accumulated material explains the observed friction instabilities. The proposed method successfully identified all scuffing phases across tests and was validated by consistent morphological and chemical evidence. ACO significantly increased the time to reach severe scuffing compared to CO, with results confirmed by Weibull statistical analysis. The approach presented herein provides a robust and replicable framework for scuffing characterization and supports the application of chemically modified biolubricants as sustainable alternatives with enhanced tribological performance.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Research on Fractal Modeling of Hard-Coated Rough Surface Contact Considering the Mechanism of Elastic–Plastic Deformation 考虑弹塑性变形机理的硬质涂层粗糙表面接触分形建模研究

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-25 DOI: 10.1007/s11249-025-02071-3

Yizhang Lian, Xueliang Zhang, Nanshan Wang, Yonghui Chen, Shanjun Liao

{"title":"Research on Fractal Modeling of Hard-Coated Rough Surface Contact Considering the Mechanism of Elastic–Plastic Deformation","authors":"Yizhang Lian, Xueliang Zhang, Nanshan Wang, Yonghui Chen, Shanjun Liao","doi":"10.1007/s11249-025-02071-3","DOIUrl":"10.1007/s11249-025-02071-3","url":null,"abstract":"<div><p>This study develops an elastoplastic fractal contact model for rough hard-coated surfaces along, with a corresponding contact stiffness model based, on a coated asperity contact model and a statistical rough surface contact model. To establish the contact stiffness model for the coated surface asperities, seven fundamental postulates were developed. Numerical simulations were conducted to systematically analyze the influence of the ratio between the coating thickness and the asperity radius, the material properties of the coating and the substrate, and the substrate surface roughness on the contact behavior and stiffness of the coated surfaces. The results demonstrate that under a given load, hard-coated rough surfaces exhibit a smaller real contact area but higher stiffness compared to uncoated surfaces. Thicker and stiffer coatings further reduce the contact area while increasing stiffness. Smoother substrate surfaces lead to a larger contact area and higher stiffness in the coated systems. These findings align with the existing statistical contact models for hard-coated rough surfaces, and the predicted contact area closely matches the prior simulation results. To validate the model, experimental tests were conducted on the TiN-coated specimens. The theoretically predicted contact stiffness showed strong agreement with the experimental measurements, confirming the accuracy and applicability of the proposed fractal-based stiffness model.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Sliding Friction of Hard Sliders on Rubber: Theory and Experiment 硬滑块在橡胶上的滑动摩擦：理论与实验

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-17 DOI: 10.1007/s11249-025-02064-2

R. Xu, B. N. J. Persson

{"title":"Sliding Friction of Hard Sliders on Rubber: Theory and Experiment","authors":"R. Xu, B. N. J. Persson","doi":"10.1007/s11249-025-02064-2","DOIUrl":"10.1007/s11249-025-02064-2","url":null,"abstract":"<div><p>We present a study of sliding friction for rigid triangular steel sliders on soft rubber substrates under both lubricated and dry conditions. For rubber surfaces lubricated with a thin film of silicone oil, the measured sliding friction at room temperature agrees well with theoretical predictions obtained from a viscoelastic model originally developed for rolling friction. On the lubricated surface, the sliding friction is primarily due to bulk viscoelastic energy dissipation in the rubber. The model, which includes strain-dependent softening of the rubber modulus, accurately predicts the experimental friction curves. At lower temperatures (<span>(T = -20^circ textrm{C})</span> and <span>(-40^circ textrm{C})</span>), the measured friction exceeds the theoretical prediction. We attribute this increase to penetration of the lubricant film by surface asperities, leading to a larger adhesive contribution. For dry surfaces, the adhesive contribution becomes dominant. By subtracting the viscoelastic component inferred from the lubricated case, we estimate the interfacial frictional shear stress. This shear stress increases approximately linearly with the logarithm of the sliding speed, consistent with stress-augmented thermal activation mechanisms.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11249-025-02064-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Achieving Ultra-Low Friction in Ti-6Al-4 V Alloy: Hydration Lubrication Mechanisms of HEC-Glycerol Composite 在ti - 6al - 4v合金中实现超低摩擦：hec -甘油复合材料的水化润滑机制

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-17 DOI: 10.1007/s11249-025-02068-y

Dezun Sheng, Hongliang Yu, Xiao Zhang, Xin Zhou

{"title":"Achieving Ultra-Low Friction in Ti-6Al-4 V Alloy: Hydration Lubrication Mechanisms of HEC-Glycerol Composite","authors":"Dezun Sheng, Hongliang Yu, Xiao Zhang, Xin Zhou","doi":"10.1007/s11249-025-02068-y","DOIUrl":"10.1007/s11249-025-02068-y","url":null,"abstract":"<div><p>Reducing alloy friction to achieve ultra-low friction is a valuable approach to save energy and reduce pollution from oil use, which is a major challenge for researchers. This study introduces a successful method to achieve ultra-low friction in Ti-6Al-4 V using a hydrated lubricant composed of hydroxyethyl cellulose (HEC). And the effects of speed and concentration on lubricating were investigated. It was found that excessive sliding speeds may lead to lubricant detachment and consequent friction increase, indicating that the adsorption ability of HEC needs to be enhanced in future studies. In addition, when the concentration exceeds 5 wt%, wear loss tends to stabilize across tests with different concentrations, while the friction force increases with rising concentrations. Based on these findings, microscopic studies were conducted to investigate the mechanism of friction reduction. Notably, distinct topographic features resembling ‘valleys’ and ‘plateaus’ were identified on the wear scars in a nanoscale scope. The movement of the surfaces induces the hydrated HEC lubricant to flow from the lower valleys to the higher plateaus, suggesting elastohydrodynamic lubrication mechanisms to form robust films. The valleys serve as lubricant reservoirs, while the plateau tops support the lubricant films to prevent contacts between Ti-6Al-4 V and Si<sub>3</sub>N<sub>4</sub>. The schematic illustrations depict the microscopic mechanisms for achieving of ultra-low friction on Ti-6Al-4 V alloy.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Laser-Induced Fluorescence (LIF) Method-Based Research on the Influence of Textured Water-Lubricated UHMWPE Bearing Tribological Performance 基于激光诱导荧光（LIF）方法的织构水润滑超高分子量聚乙烯轴承摩擦学性能影响研究

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-12 DOI: 10.1007/s11249-025-02070-4

Haixian Song, Haideng Mu, Dequan Zhu, Quan Zheng, Fuming Kuang

{"title":"Laser-Induced Fluorescence (LIF) Method-Based Research on the Influence of Textured Water-Lubricated UHMWPE Bearing Tribological Performance","authors":"Haixian Song, Haideng Mu, Dequan Zhu, Quan Zheng, Fuming Kuang","doi":"10.1007/s11249-025-02070-4","DOIUrl":"10.1007/s11249-025-02070-4","url":null,"abstract":"<div><p>The surface texturing of water-lubricated ultra-high molecular weight polyethylene (UHMWPE) bearing has the advantages of enhancing the hydrodynamic effect, capturing wear debris, reducing secondary friction, and storing water, and is one of the research hotspots in tribology. However, the influence of the surface texture of water-lubricated UHMWPE bearing on the friction performance of bearing is still unclear. Based on the laser induced fluorescence (LIF) method, this study developed an in situ-visualization observation system for water film on the friction interface of non-metallic bearing with the help of transparent glass friction pair. The typical textures with different area ratios, aspect ratios and distribution angles were used as the research objects. The water film thickness, friction coefficient and surface morphology of the friction interface of UHMWPE bearing with different textures under low-speed and heavy-load conditions were analyzed. The results show that elongated textures with a reasonable area ratio and length-to-width ratio, arranged along the direction of friction, are more likely to form hydrodynamic effects and create strong support points at the friction interface. Additionally, the divergent and convergent spaces formed at the inlet and outlet of the textured units cause the lubrication pressure at the inlet to be lower than that at the outlet, resulting in severer wear at the inlet compared to the outlet. The overall trends and the mechanism discussed in this research may be considered as a guideline for the design and optimization of surface texture of water-lubricated UHMWPE bearing.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Effects of High-Temperature Annealing on the Frictional Properties of Graphene 高温退火对石墨烯摩擦性能的影响

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-11 DOI: 10.1007/s11249-025-02065-1

Wenjie He, Yu Zhang, Qiang He, Wen Wang

{"title":"Effects of High-Temperature Annealing on the Frictional Properties of Graphene","authors":"Wenjie He, Yu Zhang, Qiang He, Wen Wang","doi":"10.1007/s11249-025-02065-1","DOIUrl":"10.1007/s11249-025-02065-1","url":null,"abstract":"<div><p>Due to the high surface-to-volume ratio, micro/nano-electromechanical systems (MEMS/NEMS) undergo severe wear during the relative sliding. Graphene, possessing excellent mechanical, physical, and chemical properties, can achieve an ultralow friction and wear state, making it highly promising for significantly minimizing friction and wear in MEMS/NEMS. However, graphene films used in MEMS/NEMS are typically subjected to thermal annealing pretreatment during the fabrication process. To maintain optimal performance, it is particularly necessary to investigate the evolution of graphene tribological properties after high-temperature annealing. In this article, by performing nanoscale atomic force microscopy (AFM) measurements on mechanically exfoliated graphene, we reveal that the friction force on graphene decreases slightly upon annealing to approximately 200 °C, then gradually increases before rising rapidly once the annealing temperature exceeds 500 °C. Raman spectroscopy identifies that the changes in friction result from the annealing-induced compressive stress accumulation and defects creation. Our results provide deep insights for the application of graphene in sliding MEMS/NEMS.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Friction Reduction Behavior of Polyacrylic Acid Solutions Driven by Molecular Structure and Adsorption Stability 分子结构和吸附稳定性驱动聚丙烯酸溶液的减摩行为

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-08 DOI: 10.1007/s11249-025-02066-0

Cheng Zheng, Jimin Xu, Haiyang Gu, Lin Sun, Juchen Zhang, Kun Liu, Tomoko Hirayama

{"title":"Friction Reduction Behavior of Polyacrylic Acid Solutions Driven by Molecular Structure and Adsorption Stability","authors":"Cheng Zheng, Jimin Xu, Haiyang Gu, Lin Sun, Juchen Zhang, Kun Liu, Tomoko Hirayama","doi":"10.1007/s11249-025-02066-0","DOIUrl":"10.1007/s11249-025-02066-0","url":null,"abstract":"<div><p>In the context of low-viscosity aqueous lubrication, this study systematically investigates the lubrication mechanisms of polyacrylic acid (PAA) solutions. It combines experimental techniques with molecular dynamics simulations to elucidate the effects of concentration-dependent molecular structures and temperature-dependent adsorption stability. Results show that with increasing PAA concentration, the friction coefficient first decreases and then increases, with optimal lubrication observed at 0.2%. Higher concentrations lead to increased PAA adsorption, elevated acidity, and molecular aggregation, resulting in surface corrosion and intensified wear. At high temperatures, while adsorption energy remains stable, enhanced chain flexibility and entanglement raise viscosity, reduce film fluidity, and accelerate wear. These findings provide valuable insights for optimizing water-based lubrication systems using PAA additives.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"73 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Enhanced Tribological Modelling of Violin Rosin 小提琴松香的增强摩擦学建模

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-03 DOI: 10.1007/s11249-025-02062-4

Jim Woodhouse, Paul Galluzzo

引用次数: 0

On the Dependence of Static Friction Coefficient on Normal Load 论静摩擦系数对法向载荷的依赖关系

IF 3.3 3区工程技术

Tribology Letters Pub Date : 2025-09-03 DOI: 10.1007/s11249-025-02061-5

Michele Ciavarella

引用次数: 0