Tribology International最新文献

{"title":"Enhanced braking performance of copper metal matrix composites incorporating fine mosaic pitch coke when mated with 30CrMnVA and C/C-SiC","authors":"Yuxuan Xu ,&nbsp;Donglin Liu ,&nbsp;Qi Chen ,&nbsp;Peiyu Zhou ,&nbsp;Ziyi Liu ,&nbsp;Xing Wang ,&nbsp;Minwen Deng ,&nbsp;Haibin Zhou ,&nbsp;Yong Han ,&nbsp;Pingping Yao","doi":"10.1016/j.triboint.2024.110378","DOIUrl":"10.1016/j.triboint.2024.110378","url":null,"abstract":"<div><div>By substituting 10 wt% of conventional graphite particles, pitch coke particles with fine mosaics demonstrate superior performance in enhancing the braking properties of copper metal matrix composites (CMMCs) operating at various conditions. When mated with C/C-SiC, the coefficient of friction increases by 18.6 % at low speeds and 38.8 % at high braking speeds, along with a significant enhancement in wear resistance across various counterparts. This improvement is attributed to the incorporation of pitch coke with fine mosaics and superior mechanical properties, which not only imparts high thermal capacity and mechanical strength to the CMMCs but also fosters a synergistic interaction between pitch coke and the iron oxide layer, stabilizing the friction layer.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110378"},"PeriodicalIF":6.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660426","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":"Effects of various laser cladding materials on the tribological properties of damaged wheel treads under various temperatures and humidities","authors":"Chenggang He ,&nbsp;Gang Zou ,&nbsp;Xinji Wang ,&nbsp;Haiqiao Liu ,&nbsp;Peng Li ,&nbsp;Jihua Liu ,&nbsp;Siuming Lo","doi":"10.1016/j.triboint.2024.110374","DOIUrl":"10.1016/j.triboint.2024.110374","url":null,"abstract":"<div><div>Laser cladding technology is used to repair damaged wheels and plays an important role in prolonging their service life. Additionally, the temperature and humidity of the environment have important effects on the operation of the repaired wheels. In this study, widely used 316 L and 420 stainless steel alloy powders were selected as cladding materials, and three environmental conditions (25℃-RH60 %, 50℃-RH60 %, and 50℃-RH90 %) were set according to changes in temperature and humidity in different areas of China. Friction and wear tests were performed under different temperature and humidity conditions on a damaged wheel after local repair by laser cladding. The results clearly show that there are demarcated equiaxed and directional columnar grain regions in the 316 L cladding, whereas there are uniform plate and strip martensite structures in the 420 cladding, which are well formed by the metallurgical bonding of the wheel substrate. From 25℃-RH60 % to 50℃-RH90 %, the friction coefficient, plastic deformation thickness, and wear rate of the wheel–rail tended to decrease. However, the wear rates of the 420-coated wheels increased as the environmental conditions increased from 25 °C-RH60 % and 50 °C-RH60 %, and the wear rates of the corresponding rail samples remained high. The main forms of surface damage are fatigue cracks and material spalling. With increasing temperature and humidity, the damage to the bonding zone between the cladding and substrate surface decreases. The damage to the cladding profile is caused mainly by cracks at different angles and spalling pits. In the 25 °C-RH60 % environment, cracks initiate in the profile of the bonding zone and propagate along the plastic rheological line to the interior of the material. In comparison, the locally repaired wheel with 316 L stainless steel alloy powder as the laser cladding material has better tribological properties and is more suitable for repairing damaged wheels.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110374"},"PeriodicalIF":6.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660421","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":"Tribological properties of polyimide coating filled with solvent-free covalent carbon quantum dots nanofluids","authors":"Baokai Zhang ,&nbsp;Xianqiang Pei ,&nbsp;Yanming Wang ,&nbsp;Shanhong Wan ,&nbsp;Gai Zhao ,&nbsp;Qihua Wang ,&nbsp;Tingmei Wang","doi":"10.1016/j.triboint.2024.110376","DOIUrl":"10.1016/j.triboint.2024.110376","url":null,"abstract":"<div><div>Novel organic coatings were developed by incorporating solvent-free covalent carbon quantum dots nanofluids (CQDs NFs) into a polyimide (PI) matrix. The tribological properties of CQDs NFs/PI composite coatings were tested using a ball-on-disk tribometer, revealing that even a low loading of CQDs NFs significantly improved tribological performance of PI. Molecular dynamics (MD) simulations and nanoindentation tests showed that CQDs NFs restricted PI molecular chain movement, enhancing mechanical properties. Additionally, CQDs NFs promoted the formation of stable transfer films on steel surfaces, improving wear resistance. This study confirms CQDs NFs' effectiveness in modifying PI composite coatings' friction and wear properties.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110376"},"PeriodicalIF":6.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660425","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":"Achieving considerable wear resistance in new Ti-based high-entropy alloys through microstructural hardening by adding Nb","authors":"Zhiwei Wang ,&nbsp;Yongcun Li ,&nbsp;Hang Dong ,&nbsp;Yong Wang","doi":"10.1016/j.triboint.2024.110379","DOIUrl":"10.1016/j.triboint.2024.110379","url":null,"abstract":"<div><div>In this study, (CoCrNiMn)₇₈Ti_22−xNb_x eutectic high-entropy alloys were successfully synthesised via an arc melting process under vacuum, and the phase structure, microstructure, mechanical properties and dry sliding tribological behaviour of the alloys were systematically investigated. The XRD results for the (CoCrNiMn)₇₈Ti_22−xNb_x eutectic high-entropy alloys are almost in agreement with the JMatPro phase diagram simulations, and the volume fraction of the Laves phase increased with increasing Nb content. OM and SEM images revealed that the microstructure was composed of dendrites (BCC A2) and interdendrites (BCC B2 +Laves) and changed from a hypoeutectic to a eutectic to a BCC B2 +Laves dual-phase structure, with the average grain size decreasing from 6.715 µm to 6.391 µm. Ti promoted the growth of the layered Laves phase and provided the alloy with base hardness and wear resistance. The hardness of the alloy combination of 21 % Ti and 1 % Nb reached the maximum value of 707.04 HV, whereas the average coefficient of friction (COF) and wear rate reached the lowest values of 0.49 and 1.668 × 10⁻⁴ mm³/N<strong>·</strong>m, respectively. With increasing load, the wear mechanism was mixed fatigue, delamination wear, and abrasive wear accompanied by oxidation, and the possibility of three-body wear paths between compacted tribolayers cannot be excluded. The debris was mostly in the form of microclusters, and the particle size range was concentrated between 1 −2 µm; meanwhile, the shape of the debris tended to develop from lamellar to spherical with increasing hardness.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110379"},"PeriodicalIF":6.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660423","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":"Prediction of grease performance and optimal additive ratio based on the SSA-GDA-LSSVM model","authors":"Yanqiu Xia,&nbsp;Hanbin Zhao,&nbsp;Xin Feng","doi":"10.1016/j.triboint.2024.110366","DOIUrl":"10.1016/j.triboint.2024.110366","url":null,"abstract":"<div><div>In this paper, to address the issue of compounding three additives in PTFE grease, we propose a machine learning model based on SSA-GDA-LSSVM to predict both the tribological performance and the optimal ratio of additives in PTFE grease. Gaussian data augmentation expanded the experimental data, and the Sparrow Algorithm optimized hyperparameters of the Least Squares Support Vector Machine. SHAP analysis clarified model predictions, and a Non-Dominated Sorting Genetic Algorithm identified optimal additive ratios, which were experimentally validated. The results showed that the model predicted friction coefficients and wear scar widths with R² values exceeding 0.97, and the experimental error for optimal ratios was less than 1 %.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110366"},"PeriodicalIF":6.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660499","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":"Fabrication and tribological properties of bionic surface texture self-lubricating 60NiTi alloy via selective laser melting and infiltration","authors":"Xiaofei Yan ,&nbsp;Hua Yan ,&nbsp;Peilei Zhang ,&nbsp;Qinghua Lu ,&nbsp;Haichuan Shi","doi":"10.1016/j.triboint.2024.110364","DOIUrl":"10.1016/j.triboint.2024.110364","url":null,"abstract":"<div><div>Due to its low elastic modulus, low density, non-magnetic and good lubricity, 60NiTi alloy is considered a novel fourth-generation aerospace bearing material. In this paper, 60NiTi biomimetic surface textured self-lubricating composites were fabricated by selective laser melting (SLM) and high-temperature fusion infiltration (HTFI). The effects of different slit widths (NTD), edge lengths (NTA), and soft metal Sn-Pb-Ag (SPA) infiltration on its tribological properties were studied. The results show that the NTA-SPA structural samples with medium texture density (ρ = 16 %) promoted the diffusion of the lubricant phase to the friction surface, resulting in a complete lubricant film. The COF stabilized at 0.2, and the wear rate decreased to 0.56 × 10⁻³ mm³/Nm, providing a more stable self-lubrication effect compared to the NTD-SPA sample.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110364"},"PeriodicalIF":6.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660684","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":"A study on the particle emission from cobalt-free studded tires against road materials","authors":"Ulf Olofsson ,&nbsp;Erik Holmström ,&nbsp;Yezhe Lyu","doi":"10.1016/j.triboint.2024.110365","DOIUrl":"10.1016/j.triboint.2024.110365","url":null,"abstract":"<div><div>The use of studded tires can cause significant wear of road surfaces then also affect the air quality in urban areas. The studs of today’s studded tires are manufactured from hard metal containing cobalt. In this study, we investigated using alternative cobalt-free hard metal studs to reduce particulate emissions in the future. The tire-to-road interface is subjected to both impact wear and sliding abrasive wear. The alternative hard metal studs were evaluated in parallel with standard studs using two different laboratory test rigs specially designed for wear and particulate emission testing. Stone materials commonly used in the road tarmacadam were utilized as counter material. The results showed that the cobalt-free studs generated lower particle concentrations and less road wear.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110365"},"PeriodicalIF":6.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660419","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":"Calculation and analysis of wet clutch sliding torque based on fluid-solid coupling dynamic behavior","authors":"Jiaxi Jin ,&nbsp;Xueliang Li ,&nbsp;Shujun Yang ,&nbsp;Haidi Yi ,&nbsp;Haodong Sun ,&nbsp;Wenqi Hao","doi":"10.1016/j.triboint.2024.110363","DOIUrl":"10.1016/j.triboint.2024.110363","url":null,"abstract":"<div><div>The fluid dynamics equations of groove cavity and non-grooved gap are established and combined to obtain fluid load bearing model. Considering the chain effect among local deformation, the deformation equation of friction surface under fluid-solid coupling load is developed to characterize reconstructed friction gap. The internal pressure and external load are used to iteratively solve the distribution of film thickness and contact area. An improved sliding torque calculation model is established by the microscopic state of fluid motion and solid deformation instead of fitting friction coefficient by multiple conditions. The accuracy of torque model is proved by sliding test. The influence of applied pressure, relative speed and lubricant flow on torque is weakened in turn according to fluid-solid state analysis.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110363"},"PeriodicalIF":6.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660683","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":"Tribological behaviour of DIN 1.2740 hot working tool steel during mandrel mill stretching process","authors":"Hamed Aghajani Derazkola ,&nbsp;Dieter Fauconnier ,&nbsp;Ádám Kalácska ,&nbsp;Eduardo Garcia ,&nbsp;Alberto Murillo-Marrodán ,&nbsp;Patrick De Baets","doi":"10.1016/j.triboint.2024.110361","DOIUrl":"10.1016/j.triboint.2024.110361","url":null,"abstract":"<div><div>This study evaluates the tribological properties of DIN 1.2740 hot tool steel against Super Cr13 martensitic stainless steel at 700 °C. The results show that the coefficient of friction (COF) ranged from 0.15 to 0.63, indicating moderate frictional interaction. The wear rate of DIN 1.2740 was observed to be low, suggesting good resistance to wear at high temperatures. The complex surface oxide layer that formed on the pin’s top surface, significantly reducing the COF and acting as a solid lubricant at elevated temperatures. The oxide layer was also fragile and unable to withstand the high sliding velocities and high loads. The steel exhibited a high surface roughness when subjected to increasing normal loads and increasing sliding velocities.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110361"},"PeriodicalIF":6.1,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660424","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":"Enhanced interlayer adhesion and regulated tribological behaviors of 3D printed poly(ether ether ketone) by annealing","authors":"Zhengwei Lin ,&nbsp;Rui Guo ,&nbsp;Yang Lyu ,&nbsp;Di Liu ,&nbsp;Jinqiu Zhu ,&nbsp;Liangying Wu ,&nbsp;Xiaolong Wang","doi":"10.1016/j.triboint.2024.110362","DOIUrl":"10.1016/j.triboint.2024.110362","url":null,"abstract":"<div><div>Most of the current poly(ether ether ketone) (PEEK) parts manufactured via fused deposition modeling (FDM) printing are suffering for weak interlayer adhesion and low mechanical strength. Herein, a simplified tactic is adopted, which combined FDM printing with annealing post-treatment, to realize a better mechanical strength, interlayer adhesion and wear resistance of 3D printed PEEK. The freeze-fracture surface of PEEK annealed at 190 ℃ was dense. At the normal load of 30 N, the wear rate of annealed PEEK reached the minimum value of 2.83 × 10⁻⁵ mm³/(N·m), with a 34 % reduction. At a higher load of 70 N, the annealed PEEK at 170 ℃ still maintained a low wear rate. Moreover, the annealed PEEK exhibited excellent manufacturing precision and fidelity. The PEEK annealed at 170 ℃ was used to simulate wear within knee-joint cavity and planetary gears were printed for demonstration, which run stably at different working conditions. These findings highlight the significant potential of 3D printed PEEK combined with annealing post-treatment in the applications of heavy-load gear and bionic joint.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110362"},"PeriodicalIF":6.1,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587219","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}