Xinyuan Cai , Dong Guan , Chun Zhang , Jianxing Zhou , Ting Chen , Zhen Chen
{"title":"Vibration induced multiscale damage mechanism of BPP: From interfacial electron transfer distortion to surface thermal ablation","authors":"Xinyuan Cai , Dong Guan , Chun Zhang , Jianxing Zhou , Ting Chen , Zhen Chen","doi":"10.1016/j.triboint.2025.110816","DOIUrl":"10.1016/j.triboint.2025.110816","url":null,"abstract":"<div><div>Surface fretting corrosion of the bipolar plate (BPP) impacts power density, efficiency, and durability of fuel cell. Traditional research focuses on surface coatings, while the significant degeneration of BPP surface due to road vibration is rarely considered. In this paper, a test bench is designed and fabricated to investigate the electrical contact of BPP interface, the contact vibration, current and interface force are regulated respectively, to obtain their impacts on performance degeneration of BPP. Results indicate the BPP surface temperature increases rapidly under 1 Hz vibration, which is close the fuel cell vibration under road operation, while the surface heat increases slowly under high frequency, high interface pressure and lower surface current density. Furthermore, the variation principle of surface contact resistance is analyzed, based on surface erosion characterization. And the erosion evolution mechanism is characterized and deduced. This investigation can provide a theoretical foundation and scientific evidence for inhibiting dynamic damage of the bipolar plate interface.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110816"},"PeriodicalIF":6.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134622","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}
Merle Reimers , Silvia Richter , Marius Bürger , Georg Jacobs , Florian König
{"title":"Wear protection of extreme pressure/anti wear additives influenced by corrosion inhibitors in oil-lubricated rolling bearings","authors":"Merle Reimers , Silvia Richter , Marius Bürger , Georg Jacobs , Florian König","doi":"10.1016/j.triboint.2025.110807","DOIUrl":"10.1016/j.triboint.2025.110807","url":null,"abstract":"<div><div>Wear protection in rolling bearings is heavily dependent on the lubricant. Therefore, extreme pressure/anti wear (EP/AW) additives are added to the lubricant to ensure low-wear operation of the bearing. These surface-active additives form tribological boundary layers (TBL) on the metal surfaces, which can prevent wear. However, commercially available lubricants also contain surface-active corrosion inhibitors (CI), which can influence the formation of TBL and thus the wear protection of EP/AW. To examine the influence of CI on the wear protection of EP/AW, tests on an axial thrust bearing test rig and chemical characterization of the TBL have been carried out. The results show synergistic as well as antagonistic influences on wear protection of EP/AW depending on the CI used.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110807"},"PeriodicalIF":6.1,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134629","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}
Pardeep Pankaj , Jeremiah Westrum , Hua Tan , Dave Kim
{"title":"Numerical investigation on pulling force and residual stresses in split-sleeve cold expansion of 2024-T3 aluminium alloy holes using a variable friction model","authors":"Pardeep Pankaj , Jeremiah Westrum , Hua Tan , Dave Kim","doi":"10.1016/j.triboint.2025.110811","DOIUrl":"10.1016/j.triboint.2025.110811","url":null,"abstract":"<div><div>Three-dimensional elastic-plastic finite element (FE) simulations were conducted to examine the effect of friction models on the performance of the split-sleeve cold expansion process for 2024-T3 aluminium (Al) alloy. To accurately capture the tribological interaction of the MoS<sub>2</sub>-based solid lubricant between the mandrel and sleeve, we integrated an empirically derived, contact-pressure-dependent variable friction model into the FE framework. A constant friction coefficient of 0.05 was applied for comparison. For each friction model, response surface analysis was performed using FE simulation results to systematically assess the effects of the cold expansion percentage and workpiece thickness on mandrel pulling force and residual stress fields around the cold-expanded holes. Split-sleeve cold expansion experiments, resulting in aluminium holes with a final diameter of 5.896 mm, were conducted for validation. Our comparative analysis shows that the variable friction model predicts mandrel pulling peak forces with errors within 10 % of the experimental values, whereas the constant friction model yields errors ranging from 11 % to 42 %. The variable friction model effectively captures the tribological behavior of the solid lubricant by accounting for the reduction in friction coefficient at the mandrel-sleeve interface as the mandrel passes through the aluminium hole under increasing contact pressure. The hole diameter estimates obtained using the variable friction model closely match experimental measurements, whereas the constant friction model overestimates hole diameters.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110811"},"PeriodicalIF":6.1,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134628","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}
Zirui Wang , Yuguang Zhu , Ronghao Ren , Tianyu Zhang , Yang Peng , Yongguang Wang , Xiaolong Lu , Chuanyang Wang
{"title":"Insight into the atomic-scale material removal of 4H-SiC electrochemical mechanical polishing (ECMP) using graphene oxide","authors":"Zirui Wang , Yuguang Zhu , Ronghao Ren , Tianyu Zhang , Yang Peng , Yongguang Wang , Xiaolong Lu , Chuanyang Wang","doi":"10.1016/j.triboint.2025.110803","DOIUrl":"10.1016/j.triboint.2025.110803","url":null,"abstract":"<div><div>Silicon carbide (SiC), owing to its excellent properties and extensive application, has been regarded as a promising semiconductor material. Nevertheless, due to the high hardness and chemical inertness of 4H-SiC, the improvement in the polishing efficiency remains a significant challenge for the industry. An ultra-precision polishing approach of electrochemical mechanical polishing (ECMP) by using the slurry, which contained the diamond abrasives and graphene oxide (GO), was presented. The single crystal 4H-SiC wafers were processed with ECMP using the slurry of 1 wt% diamond+ 0/0.25/0.5/0.75/1 wt% GO+ 1 wt% NaCl+ deionized water. Furthermore, the SiC-ECMP performance of material removal rate (<em>MRR</em>) and surface roughness (<em>R</em><sub>a</sub>) was investigated. In addition, the atomic force microscopy (AFM) morphologies of the pre-ECMP and post-ECMP 4H-SiC wafers were observed, respectively. The characteristics of ECMP slurry were conducted as well. The optimized SiC-ECMP process achieved an <em>MRR</em> of 2.32 μm/h and a <em>R</em><sub>a</sub> of 0.287 nm, demonstrating the feasibility of implementing an eco-friendly polishing process through precise control of slurry composition (diamond abrasives+ GO). This combination enables high-efficiency material removal and atomic-level surface quality while maintaining the environmental sustainability. This study offers a useful exploration in revealing the SiC-ECMP material removal mechanisms with the help of molecular dynamics (MD) simulations.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110803"},"PeriodicalIF":6.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099831","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}
Satoru Fukugaichi , Yusuke Suga , Sota Noura , Kazuhiro Takeyama , Kazuhiko Kitamura , Hiromichi Aono
{"title":"Frictional property of anionic-surfactant-loaded MgAl-layered double hydroxide films on aluminum alloy using a ring compression test","authors":"Satoru Fukugaichi , Yusuke Suga , Sota Noura , Kazuhiro Takeyama , Kazuhiko Kitamura , Hiromichi Aono","doi":"10.1016/j.triboint.2025.110810","DOIUrl":"10.1016/j.triboint.2025.110810","url":null,"abstract":"<div><div>This paper proposes an environmentally friendly alternative to conventional fluorine-based lubricants for the cold forging of Al. A Mg-Al layered double hydroxide (MgAl-LDH) film was formed on the surface of Al alloy A5052 according to Japanese Industrial Standards. Anionic surfactants were applied to create lubricant films. The film characteristics were analyzed, and the lubrication performance was evaluated using ring compression tests. The MgAl-LDH film treated with sodium stearate exhibited the lowest Coulomb’s coefficient of friction, outperforming the fluorine-based film treated with the same surfactant. This method demonstrates the potential of a new, eco-friendly pretreatment for Al cold forming, offering a promising alternative to traditional fluorine-based treatments.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110810"},"PeriodicalIF":6.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134729","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}
Hongzhan Chen , Chengjun Huang , Xin Tang , Quansheng Ma , Shaobo Gao , Shang Li , Yuqing Fan , Jie Jin , Tianbao Ma
{"title":"Superlubricity in dry rolling-sliding contacts with amorphous carbon film","authors":"Hongzhan Chen , Chengjun Huang , Xin Tang , Quansheng Ma , Shaobo Gao , Shang Li , Yuqing Fan , Jie Jin , Tianbao Ma","doi":"10.1016/j.triboint.2025.110809","DOIUrl":"10.1016/j.triboint.2025.110809","url":null,"abstract":"<div><div>Amorphous carbon films demonstrate exceptional tribological performance, yet previous studies have focused on superlubricity in pure sliding contacts, lacking a comprehensive understanding of superlubricity in rolling-sliding contacts for bearings and gears. This research focused on preparing AlCrSi/a-C:H nano-multilayer films, systematically investigating their tribological behavior in rolling-sliding contacts. Notably, the film achieved superlubricity under a wide range of slide-to-roll ratios (0–100 %) in nitrogen. The superlubricious film largely reduces interfacial adhesion and shear forces, which contribute to both pure sliding and pure rolling friction. Detailed characterization revealed that an ultra-thin transfer film is the key for achieving superlubricity in rolling-sliding contacts. This work bridges the knowledge gap between superlubricity and rolling-sliding contacts, providing a theoretical basis for engineering applications.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110809"},"PeriodicalIF":6.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083909","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 comment on “In-situ pressure and temperature measurements under mixed friction in rolling contacts and comparison with TEHD simulations”","authors":"Scott Bair","doi":"10.1016/j.triboint.2025.110801","DOIUrl":"10.1016/j.triboint.2025.110801","url":null,"abstract":"","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110801"},"PeriodicalIF":6.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070019","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}
G S Anantharam , Kunal Bhalchandra Bhole , Basil Kuriachen , Shashi Bhushan Arya
{"title":"Influence of weld parameters on the tribocorrosion behaviour of friction stir welded AA5052 in the marine environment","authors":"G S Anantharam , Kunal Bhalchandra Bhole , Basil Kuriachen , Shashi Bhushan Arya","doi":"10.1016/j.triboint.2025.110808","DOIUrl":"10.1016/j.triboint.2025.110808","url":null,"abstract":"<div><div>The study involves tribocorrosive investigation of FSW-AA5052 formed at tool-speeds of 800, 1000, and 1200 rpm and welding-speeds of 60, 80, and 100 mm/min, for which Pin-on-disc tests in conjunction with open-circuit-potential and potentiodynamic-polarization techniques were utilised. For microstructures EBSD, Optical images and XRD were taken. Results revealed that cast (−1.212 V; 332.43 μm/year), 800 rpm (−1.213 V; 433.51 μm/year) and 1000 rpm (-1.236 V; 227.45μm/year) welded samples showed better performance than all the 1200 rpm welded samples. Frictional characteristics of 800 rpm (CoF-1.28) and 1000 rpm (CoF-1.32) samples were better than other samples due to uniform and stable passivation. Elemental analysis showed Oxides and Chlorides of Al and Mg formed over the worn surfaces.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110808"},"PeriodicalIF":6.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072142","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}
Yifan Wei , Yuyang He , Zehui Gu , Jinghu Ji , Yonghong Fu
{"title":"Influence of laser-induced discrete hardening units on gear surface fatigue resistance: Investigation from contact behavior and lubrication state","authors":"Yifan Wei , Yuyang He , Zehui Gu , Jinghu Ji , Yonghong Fu","doi":"10.1016/j.triboint.2025.110797","DOIUrl":"10.1016/j.triboint.2025.110797","url":null,"abstract":"<div><div>High-energy-density gears demand enhanced wear resistance and fatigue strength that traditional surface treatments struggle to balance. This study introduces laser-induced discrete hardening units (DHUs) to create a soft–hard alternating structure on gear tooth surfaces. Gear meshing tests reveal that DHUs reduce frictional power by 9.36–27.10 % and stabilize the running-in phase. Finite element simulations indicate a 43.9–49.0 % increase in maximum equivalent stress in hard zones while lowering substrate stress. Moreover, numerical analysis shows a 0.29 % improvement in oil film thickness and a 15.6 % decrease in oil film pressure. These combined effects enhance lubricant retention, mitigate substrate wear, and improve contact fatigue performance, ultimately extending gear lifespan and offering valuable insights for fatigue-resistant gear design in applications.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110797"},"PeriodicalIF":6.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134018","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}
Beibei Lv , Qinglong Chen , Yunjie Li , Fangyuan Wang , Yulong Zhang , Jie Han , Zhengyi Jiang , Wenzhen Xia
{"title":"Anisotropy dependence of chip formation and plastic deformation in Fe-25Cr-20Ni austenitic stainless steel during micro-scratching","authors":"Beibei Lv , Qinglong Chen , Yunjie Li , Fangyuan Wang , Yulong Zhang , Jie Han , Zhengyi Jiang , Wenzhen Xia","doi":"10.1016/j.triboint.2025.110799","DOIUrl":"10.1016/j.triboint.2025.110799","url":null,"abstract":"<div><div>The wear characteristics of the tribological pair and the mechanisms of material removal are significantly influenced by the plastic deformation of the contact surface during the tribological process of metallic materials. Chip formation is recognized as one of the primary mechanisms contributing to material loss during the wear process. However, the underlying mechanisms governing chip formation remain incompletely elucidated. This paper employs micro-scratch testing to investigate the wear behavior of the {001}, {101}, and {111} grains in austenitic stainless steel under varying scratch directions and applied loads. The transition from initial indentation contact to plowing and subsequent chip formation is systematically examined, revealing the influence of crystallographic orientation and scratch direction on chip formation mechanisms. Our results demonstrate that the chip formation and plastic deformation exhibit substantial dependence on crystallographic orientation and scratch direction, which are closely associated with the activation of specific slip systems within the grains. The depth profile within the worn track and the surface topography surrounding it have a major impact on the frictional response and chip formation process. A critical depth for chip formation is identified under specific loading conditions, below which chip formation is more likely to occur. This research provides valuable insights into the micro-scale tribological behavior of face-centered cubic metallic materials, offering a theoretical foundation for optimizing material properties, enhancing wear resistance, and prolonging service life in engineering applications.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110799"},"PeriodicalIF":6.1,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134621","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}