Tribology International最新文献

{"title":"Fretting wear mechanism of GH4169 dovetail joint specimens treated with hybrid laser shock peening","authors":"Xiuyang Fang ,&nbsp;Zheng Wang ,&nbsp;Magd Abdel Wahab ,&nbsp;Jianen Gong ,&nbsp;Xiong Liu ,&nbsp;Xing Liu ,&nbsp;Zhenbing Cai","doi":"10.1016/j.triboint.2025.110740","DOIUrl":"10.1016/j.triboint.2025.110740","url":null,"abstract":"<div><div>Aero engine blade structure is prone to severe fretting wear under centrifugal forces and vibration loads, resulting in greatly reduced engine service life, which is a typical fretting damage problem. In this paper, without Absorbing layer Nanosecond Laser Shock Peening (wAN-LSP) and without Absorbing layer Nanosecond superimposed Femtosecond hybrid Laser Shock Peening (NF-LSP) are utilized to strengthen the surface of GH4169 dovetail joint specimens, which is a common material for engine blades, to explore its strengthening mechanism and fretting wear evolution law. The findings indicate that the surface roughness of the wAN-LSP specimen rises from 0.28 μm to 1.16 μm. The thermal effects of wAN-LSP lead to the formation of a molten layer roughly 10.97 μm thick on the surface, accompanied by numerous pits, ablation holes, and micro-cracks. In contrast, NF-LSP treatment effectively eliminates the surface oxidation defects made by the thermal effects of wAN-LSP, leading to a slight decrease in surface roughness. Both wAN-LSP and NF-LSP treatments enhance the surface hardness of the specimens, creating a plastic deformation layer roughly 400 μm deep, but the near surface hardness of NF-LSP treated specimen is further improved compared to that of the wAN-LSP specimen. The wear mechanism observed in the GH4169 dovetail joint specimens following wAN-LSP and NF-LSP treatment are identified as abrasive wear and oxidation wear. Initially, as the number of cycles raises, the wear volume of GH4169 specimen treated with wAN-LSP is higher than that of untreated specimen, but subsequently, it becomes lesser than that of the untreated specimen. This phenomenon results from the interplay between the molten layer and hardened layer. In the initial stage of wear, despite the surface strengthening of the wAN-LSP specimen, the presence of molten layer significantly diminishes the fretting wear resistance of the material. As wear progresses, the molten layer is removed, revealing the benefits of surface strengthening. Throughout the wear process, the wear volume of NF-LSP specimen remains consistently lower than that of other two specimens. In comparison to the wAN-LSP treatment, NF-LSP treatment can enhance the surface condition of the material, leading to improve resistance of fretting wear across various wear stages.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110740"},"PeriodicalIF":6.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891770","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":"Friction behaviors of graphene sliding on rough Au substrates and intercalated water layer by molecular dynamics simulations","authors":"Ruoyu Wu ,&nbsp;Feng Liu ,&nbsp;Huiming Ning ,&nbsp;Rui Zou ,&nbsp;Ning Hu ,&nbsp;Cheng Yan","doi":"10.1016/j.triboint.2025.110743","DOIUrl":"10.1016/j.triboint.2025.110743","url":null,"abstract":"<div><div>Superlubricity makes graphene an excellent lubricating material. To further investigate the friction properties of graphene, we established atomic models of graphene sheet sliding on the sinusoidally rough Au surface, the randomly rough Au surface, as well as the water molecule layer intercalated on Au substrate, respectively. Our results show that the friction force increases with roughness of the surface, but in the case of a small roughness, the incommensurability between the graphene and Au substrate surfaces reduces the friction force; when a water molecule layer exists, it separates the friction pairs, which results in lower friction than in the dry environment, and the deformability of water also contributes to the frictional hysteresis behavior during the loading and unloading process.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110743"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873587","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":"Controlling adhesion of PDMS elastomer through process parameters","authors":"Susheel Kumar ,&nbsp;Krishnacharya Khare ,&nbsp;Manjesh K. Singh","doi":"10.1016/j.triboint.2025.110724","DOIUrl":"10.1016/j.triboint.2025.110724","url":null,"abstract":"<div><div>As technology advances and devices miniaturize, controlling adhesion becomes critical. Adhesion is also a significant cause of failure in MEMS and NEMS devices. Examples of PDMS elastomers-based micro and nanodevices include biochips, triboelectric nanogenerators, electronic sensors, and microfluidic devices. Surface adhesion of PDMS elastomer can be managed through various techniques, including chemical surface treatments, altering surface textures, surface grafting, applying external adhesive layers, introducing material heterogeneity, and modifying the material’s mechanical properties. This research aims to tune adhesion by altering the mechanical properties, such as the modulus of elasticity of PDMS elastomer, through changes in process parameters, specifically curing temperature and curing time. We used the wedge test to determine the adhesion between the PDMS elastomer and the borosilicate glass slide. This approach creates the wedge by inserting a glass coverslip at the interface. We see a significant increase in the modulus of elasticity, an increase in equilibrium crack length, and a drop in the work of adhesion when the PDMS elastomer’s curing temperature and curing time rise. We exhibit and discuss how the process parameters affect the modulus of elasticity of the PDMS elastomer and its adhesion behavior to a borosilicate glass slide.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110724"},"PeriodicalIF":6.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877043","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":"Numerical analysis of rough surface characteristics and their contact behavior: The PSD Vs WM function generated self-affine fractal surfaces","authors":"Kai Jiang ,&nbsp;Zhifeng Liu ,&nbsp;Tao Zhang","doi":"10.1016/j.triboint.2025.110741","DOIUrl":"10.1016/j.triboint.2025.110741","url":null,"abstract":"<div><div>As is well known, rough surfaces exhibit self-affine fractal. Synthesized artificial fractal surfaces with the power spectral density (PSD) and Weierstrass-Mandelbrot (WM) function methods are employed to facilitate contact research on friction, wear and lubrication. Since these two methods are independent, it is challenging to control the input parameters and ensure the creation of identical artificial surfaces with same roughness parameters. Nevertheless, comparisons between them are necessary for engineering research. In this paper, based on Nayak’s random process theory, a power spectral density that incorporates the WM function is established. The mathematical expression for the fractal roughness <span><math><mi>G</mi></math></span> including <span><math><mi>H</mi></math></span>, <span><math><msub><mrow><mi>q</mi></mrow><mrow><mi>l</mi></mrow></msub></math></span>, <span><math><msub><mrow><mi>q</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span>, <span><math><mi>ζ</mi></math></span>, <span><math><msub><mrow><mi>h</mi></mrow><mrow><mi>rms</mi></mrow></msub></math></span> and <span><math><mi>M</mi></math></span> is then derived, using the definition of the root mean square roughness as a reference, to match the WM and PSD surfaces. Through extensive numerical simulations, the asperity overlap is quantified for the first time, with <span><math><mrow><mi>M</mi><mo>=</mo><mn>5</mn></mrow></math></span> specified, solving the problem of the WM function's inability to accurately represent rough surfaces. Additionally, we compare the multiasperity contact models with the Persson model. When the input parameters are the constant, rough surface characteristics and their contact behavior of the two surface types are nearly identical, so far both methods can be used for accurate simulation of fractal surfaces.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110741"},"PeriodicalIF":6.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864100","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":"Surface profile modelling of inclined-axis polishing based on the microscopic material removal behaviour of abrasive particles","authors":"Zhao Wang ,&nbsp;Junfei Xu ,&nbsp;Yue Yang ,&nbsp;Zhi Han ,&nbsp;Yinghao Li ,&nbsp;Linyao Wu ,&nbsp;Fusheng Liang ,&nbsp;Cheng Fan","doi":"10.1016/j.triboint.2025.110738","DOIUrl":"10.1016/j.triboint.2025.110738","url":null,"abstract":"<div><div>As the final step in surface finishing, the polishing plays a critical role in determining the quality and precision of the target surface. Despite extensive research efforts centered on the Preston Equation for polishing processes, accurately capturing material removal at the zero-velocity point remains challenging. While some studies have explored material removal based on single abrasive particle behavior, these investigations have primarily focused on traditional flat polishing. There is a notable lack of research that examines material removal from the perspective of a single abrasive particle to predict polishing profiles in inclined-axis spherical polishing head applications. Therefore, this research establishes a surface profile model of inclined-axis fixed point polishing for spherical polishing head based on material removal of single abrasive particle. In which the abrasive particle sweep cross-section versus position relationships are considered, the abrasive particle movement trajectories are calculated, and multiple abrasive particle footprints overlapping strategy are set up. Polishing experiments were carried out, varying key parameters such as vertical feed depth, inclined angle, and dwell time. The outcomes reveal that the minimum error for predicting the cross-section maximum profile depth is only 6.25 %, and the contact profile is only 5.68 %, proves the precision of the model. In additions, the results also reveal that the best prediction condition for the model of vertical feed depth ≤ 0.2 mm, the inclined angle ≥ 15°, which is also the parameter condition for the formation of the approximate Gaussian profile during the experiment. The developed model is expected to not only enhance understanding of interaction mechanisms between abrasive particle- workpiece, including particle motion trajectories, but also offer practical guidance for optimizing polishing parameters and predicting surface outcomes in industrial manufacturing applications.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110738"},"PeriodicalIF":6.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860325","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":"Mechanical degradation of 3D Cf-SiC composites at elevated temperature","authors":"Sourav Sarkar ,&nbsp;Manish Roy","doi":"10.1016/j.triboint.2025.110739","DOIUrl":"10.1016/j.triboint.2025.110739","url":null,"abstract":"<div><div>Carbon SiC (C_f-SiC) composites are finding increasing applications at elevated temperature because of their unique combination of mechanical and tribological properties. These composites are subjected to various degradation mechanisms during usage because of diverse field of applications. The intention of undertaking the present investigation is to understand and compare the material removal mechanisms of (C_f-SiC) composites subjected to impact abrasion, reciprocating wear at ambient and elevated temperature and hypersonic conditions. The results suggest that material is removed through crack formation and propagation during impact abrasion. As the test temperature is changed from ambient condition to 773 K during impact abrasion, the wear resistance of C_f-SiC composites varies from 48.47 to 41.88 under normal impact and from 7.68 to 9.59 during oblique impact. The formation of smooth self-lubricating tribo-layer governs friction during reciprocating wear. At higher load and higher temperature the formation of carbon dust occurs. The friction coefficient varies between 0.4 and 0.6 at low load. It increases to a high value at higher load and at 773 K. The main material removal mechanism during hypersonic condition is mechanical erosion although marginal ablation also takes place. Total material loss is 6.4 gm for 600 s exposure to hypersonic condition.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110739"},"PeriodicalIF":6.1,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878861","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":"Assessment on oxidative stability and tribological response of Ficus carica Oil, enhanced with TBHQ and EVA additives","authors":"Audu Ibrahim Ali ,&nbsp;Mohd Kameil Abdul Hamid ,&nbsp;Mohd Azman Abas ,&nbsp;Zulhanafi Paiman ,&nbsp;Mohd Farid M. Said ,&nbsp;Anthony Chukwunonso Opia ,&nbsp;Samion Syahrulail ,&nbsp;Izhari Izmi ,&nbsp;Zul Hilmi Che Daud","doi":"10.1016/j.triboint.2025.110735","DOIUrl":"10.1016/j.triboint.2025.110735","url":null,"abstract":"<div><div>This study tested the friction and wear behavior of Ficus carica oil (FCO) with tertbutylhydroquinone (TBHQ) and ethylene-vinyl acetate (EVA) additives. The lubricity nature of base fig oil with additives and the contact surfaces, were analysed using Fourier-transform infrared spectroscopy (FT-IR), polymeric and thermal analyses. The study established that 0.9 wt% EVA exhibited a better coefficient of friction (COF) reduction compared with other samples when the 80 N load was applied. However, SAE 5W-30 was better than 0.9 wt% EVA + 0.3 wt% TBHQ blended FCO in terms of wear resistance. Conclusively, the FCO + 0.9 wt% EVA + 0.3 wt% TBHQ gave the best Ra percentage reduction of 52.30 % at 80 N, indicating the additives mending effect for better lubricity.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110735"},"PeriodicalIF":6.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898795","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 mechanism of grease-containing self-lubricating composite epoxy coatings","authors":"Huixian Yang ,&nbsp;Xiaoqiang Fan ,&nbsp;Zhongpan Zhang ,&nbsp;Xinrui Li ,&nbsp;Minhao Zhu","doi":"10.1016/j.triboint.2025.110734","DOIUrl":"10.1016/j.triboint.2025.110734","url":null,"abstract":"<div><div>Epoxy resin (EP) exhibits poor tribological performance when used as a friction pair. In this study, lithium composite grease (LCG) was dispersed in EP using ethyl acetate as a “booster” to prepare composite coatings containing semi-solid grease (LCG/EP). X-ray computed tomography imaging confirmed the uniform distribution of LCG within the EP. The friction coefficient dropped from 0.65 to 0.066, and the wear rate decreased by 95.3 % with the introduction of 10 wt% LCG. The superior tribological performance of LCG/EP originates from the oil film formation on the friction surface. Moreover, the lubricating state from EP to LCG/EP was examined using Hertz contact theory. This work provides potentially effective support for the design of high-efficiency self-lubricating bearings.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110734"},"PeriodicalIF":6.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850546","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 analysis of rabinowitsch fluid in peristaltic flow with gold nanoparticle suspension","authors":"Zareen Zafar ,&nbsp;Ali B.M. Ali ,&nbsp;Mubbashar Nazeer ,&nbsp;Zulfiqar Ali ,&nbsp;Hala A. Hejazi ,&nbsp;Salah Saadaoui ,&nbsp;Refka Ghodhbani ,&nbsp;M. Ijaz Khan","doi":"10.1016/j.triboint.2025.110730","DOIUrl":"10.1016/j.triboint.2025.110730","url":null,"abstract":"<div><div>The current study focuses on convective heat and mass transfer of fluid-particle suspension flow of Rabinowitsch fluid in an inclined tube with ciliated walls. The objective of this theoretical study is to develop the mathematical model of the two-phase flow of Rabinowitsch fluid in peristaltic phenomena under the suspension of gold nanoparticles. The mathematical model for fluid and particle phases is constructed using partial differential equations of continuity, motion, energy, and mass concentration. The lubrication approach is used to simplify the equation and solve it by using MATHEMATICA 13.0 by using convective boundary conditions. The results for fluid, particle velocities, temperature, mass concentration, pressure gradient, and pressure rise are presented. From the computational data, it is noted that the Froude number and cilia tip parameter slow down the velocity of all fluids, and greater values of velocity are predicted at the core region of the tube for the case of Newtonian and Pseudoplastic fluids. The concentration profiles of Newtonian and Pseudoplastic fluids are diminishing versus Schmidt and Soret numbers. It is also observed that the particle phase velocity is 4 % greater than the fluid phase in the case of Pseudoplastic fluid. The present work can be used in the medical field to cure goiter glands, remove allergens from our nostrils with the help of cilia, and in the identification of damaged human body organs.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110730"},"PeriodicalIF":6.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844518","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":"Tightening performance of dual-nut connecting bolts with different height ratios and torque ratios","authors":"Wanzhi Zhou,&nbsp;Chongkai Fan,&nbsp;Wenwen Jiang,&nbsp;Dachang Zhang","doi":"10.1016/j.triboint.2025.110733","DOIUrl":"10.1016/j.triboint.2025.110733","url":null,"abstract":"<div><div>This paper investigates the tightening performance of dual-nut connecting bolts. The torque ratio <em>T</em>₂/<em>T</em>₁ is defined as the ratio of the slave nut (i.e., S-nut) torque <em>T</em>₂ to the master nut (i.e., M-nut) torque <em>T</em>₁, and the definition of the height ratio <em>h</em>₂/<em>h</em>₁ is consistent with the torque ratio. Four torque ratios and five height ratios were used as parameters for tightening tests to reveal the variation of the axial force of bolts. Then, a parametric finite element model was established to reveal the contact characteristics of M-nut and S-nut, further analyzing the influence of S-nut on the additional tension of the bolt. The results demonstrate that the axial force of the bolt is largest when both M-nut and S-nut torques are maximized. Furthermore, the axial force of the bolt improves with the increase of <em>T</em>₂/<em>T</em>₁, and the maximum is four times the initial axial force. When <em>T</em>₂/<em>T</em>₁ is four, the axial force of the bolt changes significantly with the height ratio <em>h</em>₂/<em>h</em>₁. Specifically, if <em>h</em>₂/<em>h</em>₁ is less than one, the axial force decreases as the height ratio increases, while the inverse is true when <em>h</em>₂/<em>h</em>₁ is greater than one. Additionally, the additional tensile force is almost equal to the axial force of the bolt when the <em>T</em>₂ increases to approximately 1.5 times that of the M-nut. Finally, the dual-nut tightening theory established in the paper can reveal the distribution of axial force in the threaded area and the trend of axial force variation of bolts during the S-nut tightening process.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110733"},"PeriodicalIF":6.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848219","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}