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EHL superlubricity in real machines 真实机器中的EHL超润滑
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-04-01 DOI: 10.1016/j.triboint.2025.110686
W. Habchi , S. Bair
{"title":"EHL superlubricity in real machines","authors":"W. Habchi ,&nbsp;S. Bair","doi":"10.1016/j.triboint.2025.110686","DOIUrl":"10.1016/j.triboint.2025.110686","url":null,"abstract":"<div><div>The control of shear dependence through polymer thickening or base oil blending is employed to define a path to superlubricity with acceptable film thickness which utilizes common practices in the formulation of lubricants. Much work has already been done to characterize the effects of blending on pressure-viscosity response and shear-thinning. The present work provides an outline of the rheological properties required for superlubricity. Blending of base oils is preferred over polymer thickening to retain good film forming. The next step is the characterization of promising lubricant blends in high-pressure viscometers.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110686"},"PeriodicalIF":6.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760328","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
Effect of Angle Eccentricity on Lip Seal Performance of Helicopter Gearbox 角度偏心率对直升机齿轮箱唇缘密封性能的影响
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-04-01 DOI: 10.1016/j.triboint.2025.110676
Jian Wei , CaiHong Liu , Fei Guo , Jing Tian
{"title":"Effect of Angle Eccentricity on Lip Seal Performance of Helicopter Gearbox","authors":"Jian Wei ,&nbsp;CaiHong Liu ,&nbsp;Fei Guo ,&nbsp;Jing Tian","doi":"10.1016/j.triboint.2025.110676","DOIUrl":"10.1016/j.triboint.2025.110676","url":null,"abstract":"<div><div>Rotary lip seals are key components of helicopter gearboxes, which inevitably have angle eccentricity. In this paper, a numerical simulation model considering angular eccentricity under mixed lubrication conditions is proposed to analyze the contact characteristics and sealing performance of lip seals under different eccentricity and temperature conditions. The results show that the eccentricity leads to a sinusoidal waveform contact area, an “M” shaped contact force, and reduced friction torque and leakage rate. With the increase of temperature, the contact area moves to the liquid side, the contact width increases, the contact force and friction torque both decrease, and the leakage rate increases. The error of comparison between experimental and calculated results is within 10%, and the model has high reliability.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110676"},"PeriodicalIF":6.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783458","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
Transient deformation of axial closed hydrostatic carrying system for high-end inertial friction welding based on fluid-thermal-solid interaction 基于流-热-固相互作用的高端惯性摩擦焊轴向闭式静压承载系统瞬态变形
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-04-01 DOI: 10.1016/j.triboint.2025.110683
Xinyi Yang , Xiaodong Yu , Yulong Xu , Ruichun Dai , Wentao Jia , Junfeng Wang , Jianhua Jiao , Hui Jiang
{"title":"Transient deformation of axial closed hydrostatic carrying system for high-end inertial friction welding based on fluid-thermal-solid interaction","authors":"Xinyi Yang ,&nbsp;Xiaodong Yu ,&nbsp;Yulong Xu ,&nbsp;Ruichun Dai ,&nbsp;Wentao Jia ,&nbsp;Junfeng Wang ,&nbsp;Jianhua Jiao ,&nbsp;Hui Jiang","doi":"10.1016/j.triboint.2025.110683","DOIUrl":"10.1016/j.triboint.2025.110683","url":null,"abstract":"<div><div>High-end inertia friction welding (HIFW) equipment, as an industrial mother machine, can achieve large-scale and high-precision welding of superalloy rotors for aero-engines. HIFW with closed hydrostatic carrying system was developed, Navier-Stokes equations were derived, and transient friction characteristics of oil films were solved using viscosity-temperature relationship and dynamic mesh technology. Ultimately, the transient fluid-thermo-solid interaction (FTSI) deformation was simulated, and the topography of oil films was extracted. The analysis revealed that pressure and temperature gradients concentrating towards the radial oil sealing edge under the upsetting force, the influence of back pressure side on carrying system was neglected. The minimum gap was 0.0457 mm, and the deformation showed a trend of trumpet shape along the oil sealing edge of circumferential outer.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110683"},"PeriodicalIF":6.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748591","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
High-temperature tribological properties of APS-sprayed CoCrNiW wear-resistant coating and NiCoCrAlYTa/Cu/Mo self-lubricating coating aps喷涂CoCrNiW耐磨涂层和NiCoCrAlYTa/Cu/Mo自润滑涂层的高温摩擦学性能
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-03-31 DOI: 10.1016/j.triboint.2025.110682
Zhiqiang Yang , Daoxin Liu , Mengyao Li , Kai Zhou , Yanjie Liu , Junnan Wu , Kaifa Fan , Xiaohua Zhang , Magd Abdel Wahab
{"title":"High-temperature tribological properties of APS-sprayed CoCrNiW wear-resistant coating and NiCoCrAlYTa/Cu/Mo self-lubricating coating","authors":"Zhiqiang Yang ,&nbsp;Daoxin Liu ,&nbsp;Mengyao Li ,&nbsp;Kai Zhou ,&nbsp;Yanjie Liu ,&nbsp;Junnan Wu ,&nbsp;Kaifa Fan ,&nbsp;Xiaohua Zhang ,&nbsp;Magd Abdel Wahab","doi":"10.1016/j.triboint.2025.110682","DOIUrl":"10.1016/j.triboint.2025.110682","url":null,"abstract":"<div><div>Utilizing atmospheric plasma spraying technology, we produced wear-resistant coatings of CoCrNiW and NiCoCrAlYTa/Cu/Mo self-lubricating composite coatings. The microstructures, mechanical properties, and high-temperature tribological properties were studied. The findings showed that both coatings demonstrated excellent tribological properties. As the temperature increased, the wear rate and coefficient of friction (COF) first rose and then fell. The COF for the CoCrNiW and NiCoCrAlYTa/Cu/Mo coatings were measured at 0.60 to 1.17 and 0.31 to 1.01, respectively, while their wear rates were found to be 0.60 to 2.50 × 10⁻<sup>5</sup> mm³/N·m and 0.29 to 3.35 × 10⁻<sup>5</sup> mm³/N·m. At 600 ℃, the wear track surface of the CoCrNiW coating was covered by a glaze layer, and the wear mechanism shifted from abrasive wear to adhesive wear, thereby reducing wear severity as the temperature rose. In contrast, the NiCoCrAlYTa/Cu/Mo composite coating developed a glaze layer containing self-lubricating phases at 800 ℃, effectively diminishing abrasive wear, thus showing better wear resistance than CoCrNiW coating.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110682"},"PeriodicalIF":6.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768385","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
Tribological behavior of MP159 superalloys before and after plasma nitriding at different temperatures 不同温度下等离子体氮化前后MP159高温合金的摩擦学行为
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-03-31 DOI: 10.1016/j.triboint.2025.110681
Rui Yang , Fan Li , Zelin Huang , Xuejiao Wang , Huijun Yang , Junwei Qiao
{"title":"Tribological behavior of MP159 superalloys before and after plasma nitriding at different temperatures","authors":"Rui Yang ,&nbsp;Fan Li ,&nbsp;Zelin Huang ,&nbsp;Xuejiao Wang ,&nbsp;Huijun Yang ,&nbsp;Junwei Qiao","doi":"10.1016/j.triboint.2025.110681","DOIUrl":"10.1016/j.triboint.2025.110681","url":null,"abstract":"<div><div>MP159 superalloy is considered an ideal candidate for fasteners such as load-bearing bolts in aerospace equipment due to its excellent combination of strength, plasticity and corrosion resistance. As bolted joints, friction and wear due to relative movement between workpieces are unavoidable. The resulting loss of surface material can lead to loosening of bolt fasteners with disastrous consequences. Therefore, it is essential to improve the tribological properties of MP159 superalloy. However, there is a lack of studies on MP159 superalloy regarding tribological behavior and improvement of tribological properties. Therefore, in this work, plasma nitriding was performed on MP159 superalloys to improve the tribological properties, which in turn explored their tribological behavior at room temperature (20 ℃) and elevated temperature (600 ℃). The results were showed that plasma nitriding improved the resistance of MP159 superalloys to deformation, fatigue wear, delamination wear and adhesive wear due to the synergistic enhancement of hardness, H/E and H<sup>3</sup>/E<sup>2</sup>. Meanwhile, the glaze layer formed at elevated temperature counteracted most of the hazards to tribological properties caused by the softening of the alloy and severe adhesive wear due to elevated temperature.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110681"},"PeriodicalIF":6.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768386","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
Tribological performance of bulk vitrimer composites in simulated lunar environment 块状玻璃纤维复合材料在模拟月球环境中的摩擦学性能
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-03-31 DOI: 10.1016/j.triboint.2025.110680
M. Akif Rahman , Vasilis Tsigkis , Saifur Rahman , Andreas A. Polycarpou
{"title":"Tribological performance of bulk vitrimer composites in simulated lunar environment","authors":"M. Akif Rahman ,&nbsp;Vasilis Tsigkis ,&nbsp;Saifur Rahman ,&nbsp;Andreas A. Polycarpou","doi":"10.1016/j.triboint.2025.110680","DOIUrl":"10.1016/j.triboint.2025.110680","url":null,"abstract":"<div><div>A high temperature vitrimer, Aromatic Thermosetting Copolyester (ATSP), has demonstrated superior tribological performance in harsh lunar environments, showing great promise for space applications. To enhance the mechanical properties of neat ATSP, filler materials were added. In this study, we examined the friction and wear characteristics of ATSP composite materials under harsh temperatures and abrasive conditions found on the surface of the moon for dynamic seal and bushing applications. We conducted flat pin-on-disk tribological studies to measure the coefficient of friction (COF) and wear rates of different composites against two different bearing-grade steels at different temperatures. Results show that ATSP with milled carbon fiber and graphite as filler materials exhibit exceptional resistance to wear and reduced COF at both cryogenic and high temperatures.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110680"},"PeriodicalIF":6.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783457","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
Tyre/rail contact: An experimental investigation on contaminated contact cases 轮胎/钢轨接触：污染接触案例的实验研究
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-03-31 DOI: 10.1016/j.triboint.2025.110673
Bilel Jebali, Manuela Gennesseaux, Malal Kane
{"title":"Tyre/rail contact: An experimental investigation on contaminated contact cases","authors":"Bilel Jebali,&nbsp;Manuela Gennesseaux,&nbsp;Malal Kane","doi":"10.1016/j.triboint.2025.110673","DOIUrl":"10.1016/j.triboint.2025.110673","url":null,"abstract":"<div><div>This article investigates how surface texture affects the coefficient of friction (CoF) in tire-rail contact under contaminated conditions. A pin-on-disc test was used to evaluate four steel samples with distinct textures across three contamination protocols: single wetting, periodic wetting, and grease with periodic wetting. Results indicate that under single wetting, CoF values for grooved and shot-peened samples were similar, with the highest CoF in shot-peened samples. Periodic wetting showed minimal CoF variance, while grease with periodic wetting led to the highest CoF in samples ES5 (grooved and counter grooved) and ES3 (grooved/shot peened). Findings suggest that texture height significantly affects CoF oscillations, with parameters like peak and valley density playing a more crucial role than grooves alone under certain conditions.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110673"},"PeriodicalIF":6.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816398","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
A new finite element axisymmetric model with non-axisymmetric thermal loads for thermal analyses of tread braked wheels 基于非轴对称热载荷的胎面制动车轮热分析的轴对称有限元模型
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-03-29 DOI: 10.1016/j.triboint.2025.110675
Matteo Magelli, Nicolò Zampieri
{"title":"A new finite element axisymmetric model with non-axisymmetric thermal loads for thermal analyses of tread braked wheels","authors":"Matteo Magelli,&nbsp;Nicolò Zampieri","doi":"10.1016/j.triboint.2025.110675","DOIUrl":"10.1016/j.triboint.2025.110675","url":null,"abstract":"<div><div>The paper describes the implementation of a finite element (FE) model for the calculation of the temperature field on tread braked wheels in ANSYS Mechanical APDL. The model is based on axisymmetric-harmonic elements, that allow to apply non-axisymmetric thermal loads over an axisymmetric geometry, thanks to the definition of thermal loads in terms of Fourier series coefficients. The model is benchmarked against a reference 3D model, in steady-state and transient simulations, and it provides the same outputs with improved computational times and management of memory resources. As the new model has 390 fewer degrees of freedom with respect to the 3D model, speed up factors around 1580 can be achieved, and smaller step-sizes are enabled.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110675"},"PeriodicalIF":6.1,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760329","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 effect of strain rate on surface integrity in removal of single crystal silicon and parameter optimization 单晶硅去除过程中应变速率对表面完整性的影响及参数优化研究
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-03-28 DOI: 10.1016/j.triboint.2025.110672
Jingjin Li , Shijun Ji , Ji Zhao , Peixing Ning , Wen Li , Dashun Zhang , Enzhong Zhang , Handa Dai
{"title":"Research on effect of strain rate on surface integrity in removal of single crystal silicon and parameter optimization","authors":"Jingjin Li ,&nbsp;Shijun Ji ,&nbsp;Ji Zhao ,&nbsp;Peixing Ning ,&nbsp;Wen Li ,&nbsp;Dashun Zhang ,&nbsp;Enzhong Zhang ,&nbsp;Handa Dai","doi":"10.1016/j.triboint.2025.110672","DOIUrl":"10.1016/j.triboint.2025.110672","url":null,"abstract":"<div><div>In this study, an innovative perspective of cutting strain rate for optimizing processing parameters is presented, with a comprehensive consideration of surface defects and the removal efficiency. The Macro-microscopic strain rate theoretical model is analyzed, revealing the inherent connection between cutting force, material removal efficiency and material removal energy with strain rate. Furthermore, variable depth-speed ultra-precision turning experiment and wax defect suppression comparison experiment were performed to study the effect of strain rate on edge chipping damage, surface roughness and wax defect suppression. Finally, the multi-objective optimization is studied to obtain suitable processing area. The results provide a theoretical and experimental basis for the reasonable selection of cutting processing parameters.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110672"},"PeriodicalIF":6.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821066","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
Effect of the 3D layered flow channels within the rotating ring on the steady-state performance of dry gas seals 旋转环内三维分层流道对干气密封稳态性能的影响
IF 6.1 1区 工程技术
Tribology International Pub Date : 2025-03-26 DOI: 10.1016/j.triboint.2025.110651
Qinyao Lu , Jinbo Jiang , Xiangkai Meng , Yuan Chen , Yi Ma , Xudong Peng
{"title":"Effect of the 3D layered flow channels within the rotating ring on the steady-state performance of dry gas seals","authors":"Qinyao Lu ,&nbsp;Jinbo Jiang ,&nbsp;Xiangkai Meng ,&nbsp;Yuan Chen ,&nbsp;Yi Ma ,&nbsp;Xudong Peng","doi":"10.1016/j.triboint.2025.110651","DOIUrl":"10.1016/j.triboint.2025.110651","url":null,"abstract":"<div><div>To address the issue that the sealing performance of traditional hydrodynamic dry gas seal cannot be fully optimized due to the limited space of the sealing face, a novel dry gas seal design with 3D layered flow channels is proposed, featuring layered pump-in or pump-out grooves inside the rotating ring, connected to the end-face hydrodynamic grooves via axial holes. The steady-state performance and flow field distribution of four different flow channel structures, including classic spiral groove seal, layered pump-out groove seal, layered pump-in groove seal, and layered pump-in and pump-out groove seal, are compared and analyzed under various operating conditions. The performance characteristics, applicable operating conditions, and the mechanism of both load-carrying capacity enhancement and leakage controlling of the three-layered flow channel seals are discussed, and optimal values for key structural parameters are obtained. The results show that, compared to the classic spiral groove seal, the opening force of the layered pump-in groove seal can be significantly increased but at the cost of a substantial increase in leakage rate. The layered pump-in and pump-out groove seal, with two to three pump-in and pump-out holes, demonstrates a performance advantage, achieving a 10 % increase in opening force and a 35 % reduction in leakage rate when rotating speed ranges from 10k rpm to 30k rpm, indicating which can offer excellent sealing performance over a wide range of operating conditions. This is mainly attributed to the increase in film pressure within the groove region and the reduction in pressure gradient in the dam region, resulting from the shift of the film pressure peak on the sealing end face from the groove root of the hydrodynamic grooves toward the radial middle of the groove area near the pump-in hole outlet.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"208 ","pages":"Article 110651"},"PeriodicalIF":6.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734973","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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