Tribology International最新文献

{"title":"Lubrication performance of 5CB liquid crystal combined with different wear-resistant coatings on friction surface","authors":"Qihang Cui ,&nbsp;Jingsi Wang ,&nbsp;Jiayuan Wang ,&nbsp;Chengdi Li ,&nbsp;Yan Shen ,&nbsp;Pay Jun Liew ,&nbsp;Jiujun Xu","doi":"10.1016/j.triboint.2024.110469","DOIUrl":"10.1016/j.triboint.2024.110469","url":null,"abstract":"<div><div>The tribological behaviors of chromium-based ceramic composite coating (CCC) and diamond-like carbon coating (DLC) are investigated by reciprocating sliding experiments, respectively, under lubrication conditions with and without 5CB liquid crystal additives. The addition of 5CB significantly improves the lubrication performance and protects the coatings, which is attributed to the formation of a thin lubricating film on the friction surface by 5CB molecules. The reduction in friction and wear of the CCC friction pair is more obvious, implying that the formation of the lubricating film is affected by the coating. These findings suggest a great potential for the use of liquid crystal lubricant additive in combination with solid wear-resistant coatings, which is helpful for the development of high-performance lubrication systems.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110469"},"PeriodicalIF":6.1,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158911","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}

{"title":"Probing the self-adaptive grinding behaviours of high-speed rail grinding under the sliding-rolling composite motions","authors":"Jinhong You ,&nbsp;Wulin Zhang ,&nbsp;Yu Cheng ,&nbsp;Menggang Guo ,&nbsp;Shengpeng Zhan ,&nbsp;Haitao Duan ,&nbsp;Dan Jia","doi":"10.1016/j.triboint.2024.110473","DOIUrl":"10.1016/j.triboint.2024.110473","url":null,"abstract":"<div><div>The self-adaptive grinding behaviours of high-speed rail grinding under sliding-rolling composite motions of grinding wheels were studied using a homemade apparatus. The slide-roll ratio increased with contact angle and grinding load, primarily influenced by the contact angle. As slide-roll ratio rose from 0.17 to 0.83, the lowest surface roughness (Ra ≤ 3.5 μm) and thinnest white etching layers (≤ 4.0 μm) were achieved due to enhanced grinding actions of grinding wheel. Sliding motion enabled rail material removal, while rolling motion promoted debris discharge and grinding wheel self-sharpening. The highest grinding efficiency occurred at a 45° contact angle, while the best surface quality appeared at 60°. Optimizing sliding-rolling composite motion is key to balancing efficiency and surface quality.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"205 ","pages":"Article 110473"},"PeriodicalIF":6.1,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093490","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}

{"title":"Experimental and theoretical study on relationship between anionic structures and tribological properties of oil-miscible ionic liquids","authors":"Qiangliang Yu ,&nbsp;Chen Zhao ,&nbsp;Chaoyang Zhang ,&nbsp;Xiangjian Wang ,&nbsp;Yuchen Sun ,&nbsp;Mohamed Kamal Ahmed Ali ,&nbsp;Yu Liu ,&nbsp;Shuang Sun ,&nbsp;Meirong Cai ,&nbsp;Feng Zhou ,&nbsp;Weimin Liu","doi":"10.1016/j.triboint.2024.110466","DOIUrl":"10.1016/j.triboint.2024.110466","url":null,"abstract":"<div><div>Two oil-miscible ionic liquids (ILs) with different anions, phosphate (N₈₈₈₁₆P₄) and phosphorothioate (N₈₈₈₁₆SP₄), were applied in PAO10 as lubricating additives. Adsorption layers and tribofilms formed at the interface With ILs, which facilitated transition from adhesive to abrasive wear and enhanced the tribological performance. Moreover, N₈₈₈₁₆SP₄ outperformed N₈₈₈₁₆P₄, especially at elevated temperature and under extremely high pressure. As revealed by density functional theory (DFT) calculation and transmission electron microscopy (TEM) analysis, S-containing anions not only enhanced the adsorption of ILs, but also participated into the tribochemical reaction, resulting in a tribofilm consists of iron oxides and sulfides. As the temperature increased, the content of sulfides increased, leading to superior tribological performance.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110466"},"PeriodicalIF":6.1,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158910","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}

{"title":"Effect of cold spray deposition parameters on wear performance of CrMnFeCoNi high entropy alloy","authors":"Bemechal Tsegaye Mengiste ,&nbsp;Ali Arab ,&nbsp;Pengwan Chen ,&nbsp;Jing Xie","doi":"10.1016/j.triboint.2024.110465","DOIUrl":"10.1016/j.triboint.2024.110465","url":null,"abstract":"<div><div>The wear-resistance performance of CrMnFeCoNi high entropy alloy (HEA) is low due to its ductile behavior. In this study, we investigate high wear-resistant CrMnFeCoNi coatings using cold spray additive manufacturing. Different printing conditions were used to achieve the best wear-resistance properties. The printed samples were tested to study the dry sliding wear behavior. The best cold-sprayed coating was attained at a gas temperature of 750 °C and pressure of 4.5 MPA (T7.5P4.5), which revealed the lower coefficient of friction and higher wear resistance compared to the other cold-sprayed samples and was 40 % higher than the cast and ultra-fined CoCrFeMnNi HEA. TEM revealed nano and elongated grains, numerous deformation twins, and high-density dislocations, which facilitate friction and wear rate reduction.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110465"},"PeriodicalIF":6.1,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158914","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}

{"title":"Coupling influence between environmental factors and synovial fluid components on tribological behavior of hip joint materials","authors":"Jiajia Cen ,&nbsp;Qin Chen ,&nbsp;Kai Chen ,&nbsp;Xinyue Zhang ,&nbsp;Haiyan Feng ,&nbsp;Cunao Feng ,&nbsp;Xiaowei Li ,&nbsp;Dekun Zhang ,&nbsp;Shirong Ge","doi":"10.1016/j.triboint.2024.110464","DOIUrl":"10.1016/j.triboint.2024.110464","url":null,"abstract":"<div><div>Environmental factors greatly affect the tribological behavior of hip joint materials in synovial fluid. In this paper, four groups of the synovial fluid with different concentrations of albumin (Alb), γ-globulin (γ-Glo), hyaluronic acid (HA), and phospholipids (PLs) were prepared based on the concentration of each component of the synovial fluid after artificial joint replacement. Then, taking cobalt-chrome-molybdenum (CoCrMo) and high crosslinked polyethylene (XLPE) as research objects of the hip joint materials, the tribological behaviors in the synovial fluid with different pH values and temperature were systematically explored, elucidating the influence mechanisms of external conditions and synovial fluid components on friction and wear behaviors. Results indicated that the tribological behaviors of hip joint materials were significantly affected by the pH value and temperature of the synovial fluid. The coefficient of friction (COF) of the hip joint materials in the synovial fluid initially decreased and then increased with the pH value, reaching a minimum at pH= 8.0, and sample 4 was the most sensitive to pH change. The COF of the hip joint materials in the synovial fluid ascended with temperature, showing an opposite trend to calf serum (protein concentration of 30 mg/mL) in the standard experiment. In addition, the wear of the hip joint materials was more severe in the synovial fluid with lower pH (pH=7.5 and pH=8.0) and mild in the synovial fluid with higher pH (pH=8.5). Additionally, the wear of the hip joint materials in the synovial fluid and calf serum in the standard experiment increased with the ascend of temperature, and the wear in calf serum in the standard experiment was the most affected by temperature. In conclusion, this study sheds light on the tribological behaviors and mechanisms of artificial hip joints under simulated working conditions, providing a crucial foundation for accurately evaluating the bio-tribological characteristics of artificial joint materials.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110464"},"PeriodicalIF":6.1,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158908","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}

{"title":"Efficient solution method for the Reynolds equation with Herschel–Bulkley fluids","authors":"G.H.G. van der Meer,&nbsp;R.A.J. van Ostayen","doi":"10.1016/j.triboint.2024.110460","DOIUrl":"10.1016/j.triboint.2024.110460","url":null,"abstract":"<div><div>Thin film lubrication problems frequently involve the use of lubricants with non-Newtonian characteristics, and a relatively simple viscosity model that can describe several non-Newtonian fluids is the Herschel–Bulkley relation. This relation can model solid-like properties of a lubricant at low shear stress using a yield stress, while at higher shear stress values shear-thinning or thickening can be included. In literature, this viscosity model has been combined with various governing equations to solve the non-Newtonian thin film problem, resulting in models that range from full 3D CFD simulations, to 1D Reynolds equation based methods. However, something that all of these approaches have in common is that they are either computationally expensive, can only be used for 1D geometries, or use non-exact, regularised versions of the Herschel–Bulkley model for reasons of numerical stability. This paper therefore introduces a method for solving a thin film problem with a non-regularised Herschel–Bulkley lubricant using the 2D generalised Reynolds equation, and this approach is shown to be fast without compromising on accuracy. The increased speed will allow the model to be used more efficiently in complex simulations or design optimisation scenarios.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110460"},"PeriodicalIF":6.1,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159881","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}

{"title":"Promoting resource equity through the systematic literature review in analysing cryo-lubrication techniques for sustainable machining processes","authors":"Saima Yaqoob ,&nbsp;Jaharah A. Ghani ,&nbsp;Nabil Jouini ,&nbsp;Afifah Z. Juri ,&nbsp;Che Hassan Che Haron ,&nbsp;Shalina Sheik Muhamad","doi":"10.1016/j.triboint.2024.110440","DOIUrl":"10.1016/j.triboint.2024.110440","url":null,"abstract":"<div><div>The Cryo-lubrication technique was introduced to minimize the environmental impact produced by traditional flood cooling and to promote resource equity in a sustainable manner. The synergetic interaction of cryogenic coolant and minimum quantity lubrication (MQL) produces a hybrid cryo-lubrication effect that significantly reduces the thermal-mechanical damage associated with tool-workpiece interaction. This leads to enhanced machinability and increased dimensional accuracy. To provide more insight into hybrid lubrication effectiveness, this article presents a systematic literature review of cryo-lubrication techniques for machining many difficult-to-cut materials. Two leading databases, Scopus and ScienceDirect, are used to select 82 relevant research articles published during the last six years from 2018 to 2023. The contents incudes, (a) review of cryo-lubrication fundamentals, (b) summary of the characteristics of cryo-lubrication types, (c) in-depth analysis on the effectiveness and challenges of each cryo-lubrication technique in machining processes, and d) suggestions for future perspectives. It is summarized that cryo-lubrication is better than flood, dry, cryogenic, and MQL environments in demonstrating superior heat transfer characteristics, improving chip breakability, reducing cutting force and power consumption, and enhancing surface integrity. However, in some cases, the excessive surface hardening induced by low-temperature coolant may impedes the machining performance and increased the surface roughness, cutting force, and energy consumption, thereby emphasizing potential advancements in this field.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110440"},"PeriodicalIF":6.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158913","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}

{"title":"Microstructure evolution and tribological properties of laser cladding Stellite6-Cu/Graphene composite coatings on TC4 alloy","authors":"Fei-Zhi Zhang ,&nbsp;Xiu-Bo Liu ,&nbsp;Guo-Dong Chen ,&nbsp;Wei Cheng ,&nbsp;Xin-Gong Li ,&nbsp;Jin-Peng Zhu ,&nbsp;Hong-Liang Zhao ,&nbsp;Yu Zhang ,&nbsp;Guan Liu","doi":"10.1016/j.triboint.2024.110463","DOIUrl":"10.1016/j.triboint.2024.110463","url":null,"abstract":"<div><div>There are still major limitations of their low hardness and insufficient wear resistance so far, although titanium alloys (TC4) are common materials used in key moving mechanical components. Hence, in this study, the Stellite6-Cu/Graphene coatings were prepared to employ laser cladding. The comprehensive characterization methods, such as XRD, SEM, XPS, and Raman spectrum analysis, were conducted to investigate the effect of adding graphene on the microstructure, microhardness, and tribological performances of samples. The main phase component of composite coating consisted of γ-Co solid solution, carbides (such as Cr₂₃C₆, Cr₇C_3, and TiC), and CuTi_x intermetallic compound, which were uniformly distributed into the interdendritic region and played a key role in realizing the grain refinement. This helped to greatly improve the strength and tribological performance of coatings. On a sliding tribo-pair system, the friction and wear properties of the substrate and coatings were studied, and the wear mechanisms of the samples were analyzed. The results indicate that in all composite coatings, the M2 composite coating with 1.2 wt% graphene achieved a twice increase in the microhardness compared with the raw substrate. The excellent lubrication effect of the graphene tribo-film resulted in significant reductions in friction (30 %) and wear (98 %) relative to the substrate under room temperature. At this temperature, slight adhesive wear and slight oxidative wear were the main worn mechanisms. Under a high temperature of 600 °C, the friction coefficient and wear rate were reduced by 55 % and 64 %, respectively, as compared to the substrate. This was mainly caused by the presence of oxidized tribo-film containing massive oxides and few graphene, with the mechanisms of slight abrasive wear and oxidative wear. This work is expected to provide certain data support for applying TC4 alloys in the wear-critical field.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110463"},"PeriodicalIF":6.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159878","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}

{"title":"Accurate measurement of particle velocity using a double disc anemometer in erosive wear experiments","authors":"William Cashmore ,&nbsp;Alexander Blanchard ,&nbsp;Getu Hailu","doi":"10.1016/j.triboint.2024.110439","DOIUrl":"10.1016/j.triboint.2024.110439","url":null,"abstract":"<div><div>Accurately characterizing abrasive particle velocity ejected from a nozzle in a pressurized airflow is crucial for solid particle erosion quantification, abrasive jet micromachining, and abrasive slurry micro-jet experiments. A double-disc anemometer (DDA) is an economical particle velocity measurement apparatus which is cost effective to implement. The DDA method determines particle velocity using the time it takes for particles to travel a known distance between two rotating discs mounted on the same shaft. Since 1975, the DDA has been used to measure solid particle velocities in gas-particulate flow streams. Particle velocity measurement using a DDA is an intricate process, which the experimental procedure lacks published standardization outlining, operation procedures, comprehensive error analysis, and post-processing advice, all required to report accurate and reliable results. This paper presents a new and improved DDA design, automated post-processing procedures, and experimental validation characterizing the flow development of <span><math><mrow><mn>66</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> glass bead abrasive blasted with a maximum mean particle velocity of <span><math><mrow><mn>95.3</mn><mi>m</mi><mo>/</mo><mi>s</mi></mrow></math></span>. State-of-the-art laser Doppler velocimetry equipment (LDV) was used to validate the DDA results with an agreement of −2.8 % on average. Further, this paper investigates the disc separation distance and shaft angular velocity, discussing configuration recommendations for reliable measurements, with an optimal reported uncertainty of ± 3.2 %. Finally, a novel scarring analysis method was conducted to identify the intricacies of how the instrument’s geometries affect the velocity calculation.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110439"},"PeriodicalIF":6.1,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158907","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}

{"title":"Study of atomic-scale wear characteristics of a dual-phase TiAl alloy at different vibration frequencies","authors":"Min Zheng ,&nbsp;Qiang Lu ,&nbsp;Dingfeng Qu ,&nbsp;Hongmiao Zhang ,&nbsp;Bingqi Yi ,&nbsp;Hui Tan ,&nbsp;Zongxiao Zhu","doi":"10.1016/j.triboint.2024.110461","DOIUrl":"10.1016/j.triboint.2024.110461","url":null,"abstract":"<div><div>Duplex titanium-aluminum alloys have significant advantages in terms of mechanical properties, lightweight potential, and application prospects, and have become one of the important materials for key components in the aerospace field. A deeper understanding of the mechanisms of vibration friction wear behavior close to real operating conditions is essential. The mechanical characteristics, atomic displacements, shear stresses, and dislocation densities of γ/α₂ biphasic TiAl alloys are examined in this work using molecular dynamics simulations at various vibration frequencies. It has been found that the greater the frequency of vibration, the smaller the total force on the substrate. Furthermore, the two-phase interface under friction at differing vibrational frequencies can significantly impede atomic motion. The friction process with a high vibrational frequency efficiently suppresses the anisotropic stress state, increasing the anisotropy of atomic motion. Increased vibration frequency raises the temperature of the friction region, which can lead to a softening effect that favors material removal. The microstructure evolution shows that many dislocations accumulate in the γ-phase. Higher vibration frequencies generate more defects, increasing dislocation density and the likelihood of plastic deformation in the material.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110461"},"PeriodicalIF":6.1,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159880","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}