Tribology International最新文献

{"title":"The new hybrid laser alloying method: The influence of nano-bainitic steel microstructural condition on the microstructure and hardness of the alloyed surface","authors":"G. Moskal ,&nbsp;M. Tupaj ,&nbsp;E. Szajna ,&nbsp;J. Marcisz ,&nbsp;B. Garbarz ,&nbsp;A. Tomaszewska ,&nbsp;A. Trytek ,&nbsp;K. Łysiak ,&nbsp;A. Trzcionka-Szajna","doi":"10.1016/j.triboint.2025.111048","DOIUrl":"10.1016/j.triboint.2025.111048","url":null,"abstract":"<div><div>The article presents the results of tests on NANOS-BA® class, grade P1 armour steel in two heat treatment states, subjected to a new type of surface treatment, namely hybrid laser remelting assisted by a low-temperature heat source (L-THES). The first variant produced steel with a nanobainitic structure, while the second resulted in a softened state with large carbides in a ferritic matrix. A hybrid surface remelting/alloying method was employed to modify and harden the substrate, introducing W₂C/WC granules into the substrate. Consequently, a significant increase in hardness was achieved for the softened substrate (64 HRC - an increase of over 104 % compared to the initial state) and by approximately 31 % for nanobainitic steel (67 HRC). It was determined that the factor influencing the microstructure and hardness of the laser-melted/alloyed layer is the difference in the temperature gradient, stemming from the varying values of thermal diffusivity between the nanobainitic steel and the softened state. Including an additional low-temperature energy source in the hybrid process intensified the mixing process. This led to the extraction of small fragments of tungsten carbide and a slight increase in hardness for the nanobainitic steel (the effect of buoyancy forces). This phenomenon was not observed in the softened steel, which exhibited a more significant impact of supercooling and temperature gradient. Ultimately, it was concluded that employing the new hybrid laser remelting/alloying method proved to be a highly effective means of enhancing the surface layer's hardness while preserving the high substrate flexibility.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111048"},"PeriodicalIF":6.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750004","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":"Bio-inspired functional surfaces for migration-lubrication control under external thermal gradients","authors":"Hao Qiu ,&nbsp;Qingwen Dai ,&nbsp;Wei Huang ,&nbsp;Xiaolei Wang","doi":"10.1016/j.triboint.2025.111039","DOIUrl":"10.1016/j.triboint.2025.111039","url":null,"abstract":"<div><div>In this work, a bio-inspired surface texture was developed to regulate lubricant migration and interfacial lubrication. Reciprocating friction tests in horizontal and vertical orientations were conducted to examine how thermal gradients and gravity influence the lubrication behavior of textured surfaces. Results demonstrated that surface texturing can effectively reduce friction and control lubricant loss under different directional forces. In simulated point-to-plane contact of the rotating pair tests under low-speed, light-load rotation, the textures enhanced resistance to centrifugal effects and improved lubrication stability. These findings confirm the potential of biomimetic surface designs for improving point-to-plane lubrication in complex operating conditions, with promising applications in aerospace bearings and precision motion systems.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111039"},"PeriodicalIF":6.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749734","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":"Impact of oxygen-doping on heterostructure evolution and mechanical properties of FeCrNi alloy fabricated via laser directed energy deposition","authors":"Wei Cheng ,&nbsp;Xiu-Bo Liu ,&nbsp;Xin-Gong Li ,&nbsp;Hai-Bin Zhou ,&nbsp;Yuan Meng ,&nbsp;Hong Deng ,&nbsp;Zhi-Yong Wang ,&nbsp;Shi-Hong Zhang","doi":"10.1016/j.triboint.2025.111043","DOIUrl":"10.1016/j.triboint.2025.111043","url":null,"abstract":"<div><div>Oxygen has garnered significant attention for its ability to regulate phase transformations in alloys, thereby markedly enhancing their mechanical properties. This study focuses on the structural evolution and mechanical property modulation of FeCrNi alloys. Through oxide doping, single-layer FeCrNi (MEA), Ti₃Fe₃₃Cr₃₂Ni₃₂ (MEA-T) and Ti₃Fe₃₁Cr₃₀Ni₃₀O₆ (MEA-O) alloys were successfully fabricated by laser directed energy deposition. A combination of experimental methods and molecular dynamics simulations was employed to evaluate alloy performance and analyze deformation mechanisms. The results demonstrate partial melting of TiO₂ in MEA-O, with in-situ synthesized oxide heterostructures significantly increasing geometrically necessary dislocation density, confirming their critical role in promoting dislocation nucleation and strengthening the coating. Furthermore, semi-coherent structures formed between distinct oxides coordinate cross-interface dislocation slip, reducing stress concentration and brittle fracture risk, thereby enhancing load transfer efficiency. Compared to oxygen-free alloys, MEA-O synergistically improves elastic modulus due to nanoscale precipitates and high-density semi-coherent interfaces at phase boundaries that restrict dislocation motion. Additionally, MEA-O coatings exhibit significantly enhanced wear resistance and friction reduction performance under both ambient and elevated temperatures. Conversely, Ti-doped MEA-T alloy shows performance degradation during high-temperature friction tests. Molecular dynamics simulations reveal titanium doping increases the γ_usf value of MEA-T, facilitating dislocation slip during deformation. However, precipitation strengthening causes non-uniform distribution of strengthening phases and grain refinement. These strengthening phases and grain boundaries collectively hinder dislocation propagation, increasing stacking fault roughness and stress concentration, consequently degrading the high-temperature wear resistance of the coating.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111043"},"PeriodicalIF":6.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723066","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":"Microscopic insights into wetting-like spatiotemporal evolution of spontaneous ice and its tribological behavior","authors":"Yuhao Wu ,&nbsp;Sheng Li ,&nbsp;Liguo Qin ,&nbsp;Guangneng Dong ,&nbsp;Qiao Hu","doi":"10.1016/j.triboint.2025.111040","DOIUrl":"10.1016/j.triboint.2025.111040","url":null,"abstract":"<div><div>The lubrication process of ice has been an elusive problem for centuries. Here, we report a wetting-like state before the pressure melting in ice friction processes through molecular dynamics simulations of spontaneous ice. Ice wetting, exhibiting spatiotemporal evolution, is influenced by the wettability of the solid plate, ice temperature, and compression method. Hot ice (270 K) will expand, wet, and reconstruct to form a quasi-liquid layer when the solid plate is close to ice. Cold (200 K) ice only expands and exhibits elasticity that satisfies Hooke's law when adsorbed and compressed on the plate. Ice wetting and low friction coefficient (&lt; 0.01) occur under the same conditions, which indicates that ice wetting is a precursor condition for ice slip.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111040"},"PeriodicalIF":6.1,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738759","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":"Graphene vacancy defect density effects on the tribological performance of PTFE-based composites at extreme low temperatures: Insights from reactive molecular dynamics simulations","authors":"Yiyao Luo,&nbsp;Ke Yan,&nbsp;Fei Chen,&nbsp;Bin Fang,&nbsp;Jiannan Sun,&nbsp;Jindao Guo,&nbsp;Zhenguo Bian,&nbsp;Chaoqun Tian,&nbsp;Ruizhi Li,&nbsp;Jun Hong","doi":"10.1016/j.triboint.2025.111037","DOIUrl":"10.1016/j.triboint.2025.111037","url":null,"abstract":"<div><div>This study investigates the effect of graphene (Gr) fillers with different defect densities (<em>D</em>_Gr = 0 %, 2 %, 4 %, 8 %) on the tribological properties of polytetrafluoroethylene (PTFE)-based composites under extremely low-temperature conditions (80 K) using reactive force field molecular dynamics simulations. The results show that low defect density Gr fillers (<em>D</em>_Gr = 0 %, 2 %, 4 %) significantly improve the lubrication performance of PTFE by reducing friction force and coefficient by approximately 50 %, and effectively suppress heat accumulation, lowering the temperature by about 21 %. However, when <em>D</em>_Gr reaches 8 %, the thermal conductivity of the Gr fillers decreases, leading to a temperature rise of 2.29 %, and the friction performance returns to the level of pure PTFE. Additionally, the low defect density Gr fillers further optimize the tribological performance by promoting PTFE molecular movement and reducing interface mechanical mixing.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111037"},"PeriodicalIF":6.1,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723069","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":"Fretting fatigue failure of TC4-CFRP riveted structures under cyclic shear load","authors":"Jianhua Liu ,&nbsp;Zhongfeng Weng ,&nbsp;Yue Zhao ,&nbsp;Hechang Li ,&nbsp;Jianfei Sun ,&nbsp;He Wang ,&nbsp;Yanwei Xu ,&nbsp;Jinfang Peng ,&nbsp;Minhao Zhu","doi":"10.1016/j.triboint.2025.111036","DOIUrl":"10.1016/j.triboint.2025.111036","url":null,"abstract":"<div><div>This study utilizes both experimental and numerical methods to investigate the fretting fatigue failure of TC4-carbon fiber reinforced plastic (CFRP) riveted single-shear lap joints under varying CFRP thicknesses and cyclic loads. It focuses on analyzing the dynamic response, the evolution of the contact state, and the failure mechanisms of these joints. Findings indicate that the fatigue testing process consists of two distinct stages. In the partial slip state under low loads, the interfacial temperature remains at approximately 30 °C, and fretting fatigue failure initiates on the CFRP surface. During the gross slip state under high loads, the interfacial temperature rises to around 58 °C, and the combined effects of carbon fiber structural damage and matrix bond breakage result in macroscopic wear of the CFRP. Increasing the thickness of CFRP significantly prolongs its fatigue life. For the same load half-amplitude, the fatigue life is extended by approximately 2000 times. Therefore, enhancing fatigue performance at low loads is achievable by modifying the thickness, but high loads necessitate the use of high-temperature-resistant composite materials.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111036"},"PeriodicalIF":6.1,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723229","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":"Ultra-low friction with SiO2 nanoparticles bonded sorbitan monostearate oleogel as green lubricant additives","authors":"Baihong Yu,&nbsp;Yan Shen,&nbsp;Leize Li,&nbsp;Junjing Fan,&nbsp;Jinghao Qu,&nbsp;Jiujun Xu","doi":"10.1016/j.triboint.2025.111032","DOIUrl":"10.1016/j.triboint.2025.111032","url":null,"abstract":"<div><div>SiO₂ nanoparticles bonded sorbitan monostearate oleogel (SiO₂-SMS gel) was prepared by water bath heating. The green oleogel additive in the mineral base oil reduced both the friction coefficient and the wear depth by over 50 % for the DLC and cast iron tribopairs. It achieved an ultra-low friction coefficient of 0.0411. The excellent tribological properties are attributed to the formation of a 300 nm bilayer tribofilm on the cast iron surface. The tribofilm effectively prevents plastic deformation and abrasive wear of the tribopairs. Hydroxyl bonding in the SMS molecules and the embedding of SiO₂ NPs ensure strong adhesion of the tribofilm to the substrate. The findings offer valuable insights for the development of high-performance lubricant additives.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111032"},"PeriodicalIF":6.1,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723067","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 investigation on dry sliding wear characteristics of additive manufactured titanium alloy features with various carbide balls","authors":"M.M. Basha ,&nbsp;T.S.R. Ch Murthy ,&nbsp;B. Paul ,&nbsp;A.K. Sahu ,&nbsp;M.R. Sankar","doi":"10.1016/j.triboint.2025.111029","DOIUrl":"10.1016/j.triboint.2025.111029","url":null,"abstract":"<div><div>Ti6Al4V alloys are widely used in engineering applications due to their superior mechanical and chemical properties. This study evaluated the wear performance of additively manufactured (AM) and cast titanium alloys against various hard counter bodies. The percentage change in the coefficient of friction (%∆COF) was calculated by comparing the COF values of AM and cast samples. The %∆COF values were + 52.38 % for boron carbide, −11.42 % for silicon carbide, + 32.43 % for tungsten carbide, and + 18.75 % for titanium carbide. Overall, cast titanium alloys exhibited lower COF values than AM alloys, except when contact with silicon carbide. Additionally, the cast titanium alloy exhibited lower specific wear rate against silicon carbide, while the AM titanium alloy showed higher specific wear rate against tungsten carbide.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111029"},"PeriodicalIF":6.1,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749735","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 TiN-Si2N2O modified C/C-SiC composites by warm pressing-in-situ densification","authors":"Zimu Hu,&nbsp;Running Wang,&nbsp;Zhaoxi Gou,&nbsp;Tengyang Zhang,&nbsp;Chiyu Liu,&nbsp;Ying Xia,&nbsp;Jie Fei,&nbsp;Lehua Qi","doi":"10.1016/j.triboint.2025.111028","DOIUrl":"10.1016/j.triboint.2025.111028","url":null,"abstract":"<div><div>Carbon/carbon-silicon carbide composites (C/C-SiC) have gained widespread attention as a new type of braking materials, but the long preparation cycle and cost have limited the wide range of applications. In this work, a novel warm pressing-in-situ densification method was proposed to prepare TiN-Si₂N₂O modified C/C-SiC composites. This novel method reduced the preparation cycle time significantly. The results showed that CTNS-3 with 44.5 % TiN-Si₂N₂O content had the best flexural and compressive performance, with 145 % and 87 % improvement. CTNS-2 with 37.0 % TiN-Si₂N₂O content had the best tribology performance. Additionally, the wear rate of CTNS-2 achieved 0.433 μm/cycle, representing an impressive decrease of 48 %. This work balance rapid preparation with excellent performance, providing a promising strategy for the development of C/C-SiC braking materials.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111028"},"PeriodicalIF":6.1,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714312","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":"Adhesion and friction in viscoelastic rough contacts","authors":"Michele Mastropasqua ,&nbsp;Andrea Ronchi ,&nbsp;Antonio Serra ,&nbsp;Nicola Menga ,&nbsp;Giuseppe Carbone","doi":"10.1016/j.triboint.2025.111000","DOIUrl":"10.1016/j.triboint.2025.111000","url":null,"abstract":"<div><div>Controlling adhesion and friction in viscoelastic contacts is crucial in several application fields of modern engineering. In this study, we investigate the adhesive contact of rough profiles sliding past a viscoelastic half-plane. We solve the multiscale contact problem enforcing energy balance between internal stresses and adhesive works under virtual infinitesimal variations of the contact domain. Our findings indicate that the interplay between adhesion and viscoelasticity at the contact edges and in the bulk material is fostered by multiscale roughness, eventually leading to strongly increased contact area and friction at characteristic sliding velocities. Finally, we compare the frictional behavior of a sinusoidal indenter (single wavelength) with the rough case (multiscale), showing that adhesion-induced friction enhancement occurs in both cases.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"213 ","pages":"Article 111000"},"PeriodicalIF":6.1,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723065","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}