Huang Gao , Yawen Yang , Limin Ma , Weihong Jia , Jinyu Zhu , Yong Ding , Shengrong Yang , Jinqing Wang
{"title":"Self-adaptive epoxy protective coating filled with MoS2@PMMA core-shell hybrid and its excellent tribological and anticorrosive properties","authors":"Huang Gao , Yawen Yang , Limin Ma , Weihong Jia , Jinyu Zhu , Yong Ding , Shengrong Yang , Jinqing Wang","doi":"10.1016/j.triboint.2025.110774","DOIUrl":"10.1016/j.triboint.2025.110774","url":null,"abstract":"<div><div>Pure epoxy resin (EP) coating exhibits poor wear resistance and weak corrosion protection capability, resulting in short service life. In this work, MoS<sub>2</sub>@polymethyl methacrylate (MoS<sub>2</sub>@PMMA) core-shell hybrid was firstly synthesized by emulsion polymerization, which demonstrated stability in high humidity conditions attributing to reduced MoS<sub>2</sub> oxidation. As an additive, the tribological performances of MoS<sub>2</sub>@PMMA/EP coating at different humidity and its anti-corrosive property were explored. Under high humidity, the MoS<sub>2</sub>@PMMA/EP coating exhibited the lowest friction coefficient (0.36) compared with EP coating (0.49) and MoS<sub>2</sub>/EP coating (0.56). Especially, the wear rate of the MoS<sub>2</sub>@PMMA/EP reduced by 95.07 % and 93.22 % as to EP coating and MoS<sub>2</sub>/EP coating, respectively. Furthermore, electrochemical tests showed the MoS<sub>2</sub>@PMMA could enhanced the corrosion resistance of the EP matrix.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110774"},"PeriodicalIF":6.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922983","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}
Lintao Duan , Weitao Du , Liming Wang , Wennian Yu , Zaigang Chen , Fengshou Gu , Andrew Ball
{"title":"Time-varying transient EHL behaviors of spur gear pairs considering tooth waviness extracted by gaussian filter","authors":"Lintao Duan , Weitao Du , Liming Wang , Wennian Yu , Zaigang Chen , Fengshou Gu , Andrew Ball","doi":"10.1016/j.triboint.2025.110758","DOIUrl":"10.1016/j.triboint.2025.110758","url":null,"abstract":"<div><div>Tooth waviness has been experimentally proven to be the main cause of “ghost order” noise in high-speed gear transmission systems, which affects vibration and noise through meshing contact or transmission errors. However, most studies have focused on the influence of tooth surface roughness on the gear lubrication contact characteristics, ignoring the effects of mesoscopic tooth waviness. Furthermore, there is a lack of an effective method for extracting tooth waviness from measured tooth topographies. To fill this gap, a novel method for extracting tooth waviness based on the Gaussian filter is proposed. A three-dimensional transient line contact elastohydrodynamic lubrication (EHL) model coupling rolling, sliding, and elastic deformation is established. The effects of tooth waviness and its parameters on the lubrication characteristics and contact mechanical properties are analyzed. Results show that tooth waviness alters the overall stability of the gear meshing lubrication regime. Compared to smooth tooth surface, waviness has a more significant effect on rolling friction than on sliding friction and film damping. The effects of waviness order and amplitude on the tooth meshing contact mechanical properties exhibit opposite trends. This research establishes a theoretical foundation for understanding the dynamic service behavior under the influence of tooth waviness and holds significant guidance and engineering value for controlling the tooth surface machining quality.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110758"},"PeriodicalIF":6.1,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143911751","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":"Effect of ultrasonic needle peening on tribological characteristics of GH4169 alloy at elevated temperature","authors":"Bassiouny Saleh , Adnan Saifan , Lu Zhang , Liguo Zhao","doi":"10.1016/j.triboint.2025.110763","DOIUrl":"10.1016/j.triboint.2025.110763","url":null,"abstract":"<div><div>Robotic ultrasonic multi-needle peening (UNP) provides superior surface enhancements with minimal changes and simpler processing compared to conventional methods. This study investigates UNP, applied loads, and temperatures on GH4169 superalloy’s wear behavior using a ball-on-disc tribometer. Results show UNP significantly boosts surface hardness, with higher vibration amplitudes improving it further. Treated samples exhibit hardness increases of 18.34 % and 35.07 %. The wear rate is high at room temperature, decreases at 525°C, but slightly rises at 650°C. Friction coefficient trends oppose wear rates, reflecting complex thermal interactions. UNP forms a hardened layer resisting abrasion, while elevated temperatures create a protective oxide layer. Wear mechanisms shift from severe delamination in untreated samples to milder abrasion and oxidative wear in treated ones.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110763"},"PeriodicalIF":6.1,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907091","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}
Yang Tian , Bohao Zheng , Muhammad Khan , Feiyang He
{"title":"Influence of sliding direction relative to layer orientation on tribological performance, noise, and stability in 3D-printed ABS components","authors":"Yang Tian , Bohao Zheng , Muhammad Khan , Feiyang He","doi":"10.1016/j.triboint.2025.110762","DOIUrl":"10.1016/j.triboint.2025.110762","url":null,"abstract":"<div><div>The tribological performance of 3D-printed ABS components is influenced by layer orientation, yet its effects on friction, wear, noise, and system stability remain underexplored. This study investigates how the angle between sliding direction and layer lines (0°, ± 45°, 90°) impacts these properties in FDM-printed ABS. Pin-on-disc tests (10–20 N loads, 0.314–0.628 m/s speeds) and modeling (FEM for wear and temperature, lumped-parameter for stability) were conducted. The 90° orientation showed the highest coefficient of friction (COF) due to mechanical interlocking but the lowest wear, while the 0° orientation had the lower COF and highest wear from interlayer shear. The −45° orientation produced the most noise due to debris-induced stick-slip, while the 45° orientation generated the least. FEM wear predictions aligned well with experiments (<7 % error), but noise predictions had higher errors (up to 15 %). Increased wear depth raised vibration frequencies, and larger static-kinetic COF differences increased instability.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110762"},"PeriodicalIF":6.1,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907092","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 behavior of bearing steel grades in a corrosive environment","authors":"Aditya Mishra, Ayush Jain, Lokesh Agrawal, Sandeep Saraf, Deepika Shekhawat","doi":"10.1016/j.triboint.2025.110770","DOIUrl":"10.1016/j.triboint.2025.110770","url":null,"abstract":"<div><div>This study examines the tribological behavior of AISI 52100, 440C, and Cronidur 30 bearing steels in a corrosive liquid environment, emphasizing their resistance to hydrogen-induced corrosion. These materials were evaluated for use in hydrogen-rich applications, such as aerospace propulsion systems and fuel cell vehicle pumps. A ball-on-disc test measured friction, wear rate, and surface roughness. SEM and EDS analyses assessed hydrogen corrosion effects. The results showed that Cronidur 30, enriched with chromium, molybdenum, and nitrogen, exhibited superior wear resistance and lower friction, outperforming AISI 52100 and 440C. Its enhanced properties make it potential steel grade for bearings in hydrogen environments. The study highlights the importance of selecting suitable steel grades for improved durability and reliability in corrosive conditions.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110770"},"PeriodicalIF":6.1,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916483","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":"Improvement of measurement accuracy for oil film distributions on piston skirts by blocking diffuse fluorescence with a hole in a cover","authors":"Yasuhiro Ishikawa , Shirio Kume , Ruka Matayoshi , Akemi Ito , Kenichi Yamashita","doi":"10.1016/j.triboint.2025.110736","DOIUrl":"10.1016/j.triboint.2025.110736","url":null,"abstract":"<div><div>The induced fluorescence method is one of the most promising techniques for evaluating oil film distributions on a piston skirt. However, preliminary tests revealed that its measurement accuracy is insufficient.</div><div>This study aims to clarify the influence of diffuse light from surrounding regions of a measurement point, assuming it to be a potential cause of measurement accuracy deterioration, and to suggest a way to improve the measurement accuracy of this method.</div><div>Oil film distributions were measured using a visualized engine with a whole sapphire glass cylinder. To evaluate the influence of diffuse light, a cover with a hole was attached to the outer surface of the cylinder and fluorescence intensity with and without the cover was compared during both calibration and engine operation.</div><div>The fluorescence intensity with the cover was lower than without it, indicating that diffuse light from outside the measurement point contributes to measurement deterioration. Furthermore, the result demonstrated that the influence of diffuse light can be corrected accurately using the correlation between the fluorescence intensity with and without the cover.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110736"},"PeriodicalIF":6.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143934605","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}
Ayna Zahoor , Atikur Rahman , Mohammad Mursaleen Butt
{"title":"Inconel 718 Alloy: A study of microstructure, hardness, and tribological properties","authors":"Ayna Zahoor , Atikur Rahman , Mohammad Mursaleen Butt","doi":"10.1016/j.triboint.2025.110769","DOIUrl":"10.1016/j.triboint.2025.110769","url":null,"abstract":"<div><div>This study investigates the microstructural features, hardness, and wear behavior of Inconel 718, a nickel-based superalloy widely used in aerospace and defense applications due to its exceptional strength and wear resistance. Dry sliding wear tests were conducted using a ball-on-disc tribometer at loads of 10 N, 30 N, and 50 N, with a sliding speed of 15 Hz over a 54-meter distance, following ASTM G99 standards. Microstructural characterization was performed using FE-SEM, and nano-indentation tests showed an average hardness of 3.118 GPa. 3D profilometry revealed the highest wear depth (9.48 µm) and surface roughness (1.09 µm) at 50 N. The lowest COF and wear rate occurred at 30 N, attributed to a stable tribo-layer that reduced surface contact and material loss.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110769"},"PeriodicalIF":6.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916484","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}
Linwei Shi , Qinwei Wang , Liangliang Shen , Ling Pang , JianXiang Huang , Zhiying Ren
{"title":"Influence of self-contact friction on the hysteresis mechanical behavior of Entangled Metal Pseudo Rubber","authors":"Linwei Shi , Qinwei Wang , Liangliang Shen , Ling Pang , JianXiang Huang , Zhiying Ren","doi":"10.1016/j.triboint.2025.110765","DOIUrl":"10.1016/j.triboint.2025.110765","url":null,"abstract":"<div><div>Focusing on the nonlinear hysteresis behavior of Entangled Metal Pseudo Rubber (EMPR) under quasi-static compression, this study investigates the impact of self-contact friction on its energy dissipation and path memory characteristics. By employing virtual manufacturing and finite element numerical simulation, we digitally reproduce the entire process from wire winding to cold stamping and precisely tune the contact friction coefficient between wire turns under interference-free conditions. The results show that the hysteresis behavior of EMPR can be decomposed into three mechanically meaningful components: nonlinear elastic backbone force, friction force, and hysteretic force. Among these components, the elastic backbone force remains consistent as a unique function of strain, while the friction and hysteretic contributions determine the opening of the hysteresis loop and the material’s path memory features. Numerical simulations and experimental validations demonstrate that adjusting the friction coefficient can significantly alter the material’s energy absorption capacity and hysteresis loop area, thereby providing favorable conditions for extracting, identifying, and verifying the physical meaning of the elastic backbone line. This study not only deepens our understanding of the mesoscopic frictional contact mechanism in EMPR and the construction of physically meaningful hysteresis constitutive relationships, but also offers an important theoretical foundation and technical reference for designing high-performance EMPR components.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110765"},"PeriodicalIF":6.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898797","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}
Zeyu Li , Xiaoguang Yang , Xue Zhang , Bi Wu , Zhengtao Wu , Deli Duan
{"title":"Tribology properties of MoN-Cu adaptive coatings on L605 for variable cycle engine application","authors":"Zeyu Li , Xiaoguang Yang , Xue Zhang , Bi Wu , Zhengtao Wu , Deli Duan","doi":"10.1016/j.triboint.2025.110767","DOIUrl":"10.1016/j.triboint.2025.110767","url":null,"abstract":"<div><div>The pressing demand for multi-mode propulsion systems stimulates the development of Variable Cycle Engines (VCEs). However, the severe friction conditions encountered by variable geometry components pose great challenges to the longevity of VCEs. Here, we synthesize MoN-Cu adaptive coatings on L605 using magnetron sputtering and investigate their tribological performance from room temperature to 800°C. We demonstrate that, despite the involvement of surface reactions of Co diffusing from the substrate at high temperatures, the coating displays commendable lubricity, except at medium temperatures where the coating’s mechanical properties deteriorate and thus severe abrasive wear. Our results provide critical insights into the tribological mechanism of the MoN-Cu coated cobalt-based alloy, knowledge vital for developing coating strategies against the persistent tribological issue in VCEs.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110767"},"PeriodicalIF":6.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916488","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}
Tomas Grejtak , Miranda W. Kuns , Jeffrey A. Lacey , Oyelayo O. Ajayi , George Fenske , Peter J. Blau , Jun Qu
{"title":"Enhancing the shredder durability for biomass preprocessing by utilizing wear-resistant cutter materials","authors":"Tomas Grejtak , Miranda W. Kuns , Jeffrey A. Lacey , Oyelayo O. Ajayi , George Fenske , Peter J. Blau , Jun Qu","doi":"10.1016/j.triboint.2025.110766","DOIUrl":"10.1016/j.triboint.2025.110766","url":null,"abstract":"<div><div>Shredders are widely used to reduce biomass feedstock size through the shearing action of the cutter teeth that are susceptible to wear. A series of wear tests using a custom-built shredder was conducted on corn stover feedstock with three cutter materials: a conventional D2 tool steel, iron boriding as a candidate surface treatment, and M42 tool steel as a candidate alloy. Wear tests showed that the iron borided D2 steel significantly increased the tool life compared with the non-treated D2 and M42. Although the M42 cutters initially exhibited less wear than the D2 cutters, the benefit faded as preprocessing progressed. The experimental results demonstrated that the durability of shredder cutters can be substantially improved by applying more wear-resistant tool materials.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"210 ","pages":"Article 110766"},"PeriodicalIF":6.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922985","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}