IF 5.3 1区工程技术

Wear Pub Date : 2025-05-20 DOI: 10.1016/j.wear.2025.206137

Sujie Jia , Jing Qin , Li Chen , Yunhuan Zhang , Yuze Mao , Hualin Lin , Sheng Han

{"title":"Tribological properties and synergistic lubrication mechanism between tetramethyl dodecyl diisooctyl phosphate ionic liquids and molybdenum-based metal organic frameworks additives","authors":"Sujie Jia , Jing Qin , Li Chen , Yunhuan Zhang , Yuze Mao , Hualin Lin , Sheng Han","doi":"10.1016/j.wear.2025.206137","DOIUrl":"10.1016/j.wear.2025.206137","url":null,"abstract":"<div><div>Metal-organic frameworks (MOFs) have recently been utilized as lubricant additives due to their excellent friction-reducing and anti-wear properties. In this study, molybdenum-based MOFs (Mo-MOFs) were applied as additives for lubricating oil PAO10. Meanwhile, the trimethyl dodecyl diisooctyl phosphate ionic liquid (N/P) was prepared as a dispersant. It has been confirmed that the additive combination of 1 wt % N/P and 0.15 wt % Mo-MOFs exhibited the best tribological performance, reducing the coefficient of friction by 31.25 % and the wear volume by 95 %. A series of characterizations confirmed that the synergistic mechanism between Mo-MOFs and N/P was the key to lubrication. During the frictional sliding, molybdenum element in Mo-MOFs was activated and oxidized to produce molybdenum oxides at the interface. Besides, under the dispersion of N/P, MOFs can easily enter the contact area of friction pair. While N/P not only played a dispersing role, but also enriched more lubricating phosphates at the interface. The above-mentioned oxides and phosphates together form the tribofilm, which has low shear force and frictional interface protection. It was the synergistic effect of Mo-MOFs and N/P that achieved the outstanding lubrication properties.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"576 ","pages":"Article 206137"},"PeriodicalIF":5.3,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125011","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 copper-rich precipitations on the adaptive behavior of low carbon martensitic steels during dry sliding wear 富铜沉淀对低碳马氏体钢干滑动磨损自适应行为的影响

IF 5.3 1区工程技术

Wear Pub Date : 2025-05-19 DOI: 10.1016/j.wear.2025.206136

Kun Wang , Liangying Yin , Zhengliang Long , Neng Liang , Dengdong Zhu , Shenghua Zhang

{"title":"Effect of copper-rich precipitations on the adaptive behavior of low carbon martensitic steels during dry sliding wear","authors":"Kun Wang , Liangying Yin , Zhengliang Long , Neng Liang , Dengdong Zhu , Shenghua Zhang","doi":"10.1016/j.wear.2025.206136","DOIUrl":"10.1016/j.wear.2025.206136","url":null,"abstract":"<div><div>The adaptive behavior of martensitic steel during sliding wear, such as tribo-oxidation layer (ToL) formed in situ on the wear surface and the plastic deformation layer (PDL) formed spontaneously on the subsurface layer, can effectively inhibit wear. In this paper, the dry sliding wear behavior of 15-5 PH martensitic stainless steel after solution treatment and aging treatments was analyzed, and the influence mechanism of copper-rich precipitations (CPRs) on the adaptive behavior during wear process was explored by molecular dynamics simulation. The results show that the average wear loss of 15-5 PH steel aged at 450 <span><math><mrow><mo>°C</mo></mrow></math></span> is about 89.7 % lower than that solution quenching at 1050 <span><math><mrow><mo>°C</mo></mrow></math></span> under the action of nanoscale copper-rich precipitations (Nano-CPRs). The Nano-CPRs effectively hinder the slip of dislocations, which not only enhances the deformation resistance of the material, but also promotes the formation of more uniform subgrain boundaries in the subsurface. A large number of sub-grain boundaries enhance the overall performance of the PDL that effectively prevent the failure and serious wear of the ToL. This work reveals the failure mechanism of the ToL, the formation mechanism of the PDL and the influence mechanism of the CPRs on friction adaptive behavior of 15-5 PH steel, and also provides theoretical support for optimizing the wear resistance of martensitic steel.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"576 ","pages":"Article 206136"},"PeriodicalIF":5.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125014","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

Friction and wear behaviour of friction-induced crystallinity of polyaryl ether ketone (PAEK) 聚芳醚酮（PAEK）摩擦结晶度的摩擦磨损行为

IF 5.3 1区工程技术

Wear Pub Date : 2025-05-19 DOI: 10.1016/j.wear.2025.206134

Mengjiao Li , Ke Zhang , Shengqi Ma , Gang Liu , Jianan Yao , Hao Liu

{"title":"Friction and wear behaviour of friction-induced crystallinity of polyaryl ether ketone (PAEK)","authors":"Mengjiao Li , Ke Zhang , Shengqi Ma , Gang Liu , Jianan Yao , Hao Liu","doi":"10.1016/j.wear.2025.206134","DOIUrl":"10.1016/j.wear.2025.206134","url":null,"abstract":"<div><div>Poly aryl ether ketone (PAEK) is increasingly attractive as an essential matrix for its remarkable comprehensive performance. However, studies on the correlation between crystallinity and tribological properties of PAEK are still questionable. This study aimed to correlate the crystallinity of PAEK with its tribological properties and to analyze the behavior of friction-induced crystallization of PAEK in its nearly amorphous state. Herein, almost amorphous PAEK-A and semicrystalline PAEK were fabricated via injection molding, and the behavior of friction-induced crystallization of PAEK was investigated under dry sliding conditions at a pressure of 50 N and a velocity of 0.21 m/s. According to the results, PAEK-4A exhibited the lowest wear rate of 28.8 × 10<sup>−6</sup> (mm<sup>3</sup>/Nm) of four PAEK-A in different flowabilities. The crystallinity of PAEK-4A wear debris was 33.9 %, which increased by 25.3 % compared with the initial samples. The intensity ratio of Raman characteristic peaks to characterize crystallinity variation also demonstrated the increase of crystallinity on the wear track (1.6–2.7). The crystallization behavior of PAEK-A wear debris and the crystalline behavior of PAEK-A triggered by the friction process played a positive role in improving the wear resistance of PAEK-A. This research guides the influence of various parameters on the friction performance of high-performance PAEK.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"576 ","pages":"Article 206134"},"PeriodicalIF":5.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125012","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

Effects of simulated space atomic oxygen irradiation on the lubrication properties and mechanisms of gallium-based liquid metal 模拟空间原子氧辐照对镓基液态金属润滑性能及机理的影响

IF 5.3 1区工程技术

Wear Pub Date : 2025-05-17 DOI: 10.1016/j.wear.2025.206132

Yanxin Si , Jie Guo , Jian Liu , Zhibo Liu , Xinjian Cao , Jun Cheng , Shengyu Zhu , Jun Yang

{"title":"Effects of simulated space atomic oxygen irradiation on the lubrication properties and mechanisms of gallium-based liquid metal","authors":"Yanxin Si , Jie Guo , Jian Liu , Zhibo Liu , Xinjian Cao , Jun Cheng , Shengyu Zhu , Jun Yang","doi":"10.1016/j.wear.2025.206132","DOIUrl":"10.1016/j.wear.2025.206132","url":null,"abstract":"<div><div>Gallium-based liquid metal (GLM) is expected to be applied in extreme space environments, but the research on its space applicability is little. In this paper, the effects of atomic oxygen (AO) irradiation on the lubrication behaviors of GLM are studied for AISI440C steel/CuSn<sub>6</sub> friction pairs and AISI440C steel self-mated pairs. AO irradiation causes GLM oxidation to form Ga<sub>2</sub>O<sub>3</sub>. GLM is a great potential lubricant for application in AO environment of space, but the friction pair material should be AISI440C steel instead of CuSn<sub>6</sub>. Under the synergistic effect of friction and corrosion, the wear rate of CuSn<sub>6</sub> can reach the order of 10<sup>−4</sup> mm<sup>3</sup>/N·m. Ga<sub>2</sub>O<sub>3</sub> can still corrode CuSn<sub>6</sub> at a faster rate than GLM, thus AO irradiation further increases the wear. AO irradiation does not significantly alter the lubrication performance of GLM on AISI440C steel self-mated pairs, as both oxidized and unoxidized GLM can form low shear-strength gallium-rich film at the steel frictional interfaces to achieve lubrication. The research results of this paper will provide some useful references for the application of GLM in space.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"576 ","pages":"Article 206132"},"PeriodicalIF":5.3,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147433","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

Particulate matter emissions from brake pads: A comparative study of low-steel and non-asbestos organic materials 来自刹车片的微粒物质排放：低钢和非石棉有机材料的比较研究

IF 5.3 1区工程技术

Wear Pub Date : 2025-05-17 DOI: 10.1016/j.wear.2025.206131

A. Diana , E. Conca , R. Bartrolí , T. Moreno , X. Querol , E. Padoan , O. Abollino , P. Inaudi , M. Malandrino , F. Amato

{"title":"Particulate matter emissions from brake pads: A comparative study of low-steel and non-asbestos organic materials","authors":"A. Diana , E. Conca , R. Bartrolí , T. Moreno , X. Querol , E. Padoan , O. Abollino , P. Inaudi , M. Malandrino , F. Amato","doi":"10.1016/j.wear.2025.206131","DOIUrl":"10.1016/j.wear.2025.206131","url":null,"abstract":"<div><div>This study investigates the particulate matter (PM) emissions generated from the wear of four different commercial brake pads (two Low-Steel and two Non-Asbestos Organic). Brake materials were tested by means of the AK Master test procedure, and emitted brake wear PM was collected by means of a Dekati Low-Pressure Impactor. For each tested pad, the 13 samples collected at each impactor stage during three sections of the test were weighted and then subjected to acidic digestion and ICP-OES and ICP-MS elemental analysis; a suite of 56 elements was analysed. The analysis revealed distinct differences in emission profiles based on both pad composition and braking intensity. Low-Steel pads emitted more PM<sub>10</sub> and PM<sub>2.5</sub> under mild braking conditions, while Non-Asbestos Organic pads emitted higher levels of PM<sub>0.1</sub> during intense braking. The size distribution of PM emissions shifted from unimodal to bimodal as severe braking events increased, with fine and ultrafine particles becoming more prominent. Principal Component Analysis (PCA) was applied to identify chemical composition differences between the brake pads. Low-Steel pads emitted iron-rich particles due to the ferrous materials in their composition, while Non-Asbestos Organic pads emitted particles rich in non-ferrous metals such as barium and titanium. Additionally, driving style had a strong influence on both the quantity and size distribution of the emitted PM. Frequent, intense braking events led to a significant increase in the total quantity of PM and a higher proportion of fine and ultrafine particles. The findings highlight the importance of material composition and braking behaviour in mitigating brake wear emissions, which are projected to become the dominant source of traffic-related air pollution in the future.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"576 ","pages":"Article 206131"},"PeriodicalIF":5.3,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105548","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

Microstructure evolution and damage development in the rails of a single-track railway line after preventive grinding 单线铁路钢轨预防性磨削后组织演变及损伤发展

IF 5.3 1区工程技术

Wear Pub Date : 2025-05-16 DOI: 10.1016/j.wear.2025.206101

B. Schotsman , J. Huisman , M.J. Santofimia , R.H. Petrov , J. Sietsma

{"title":"Microstructure evolution and damage development in the rails of a single-track railway line after preventive grinding","authors":"B. Schotsman , J. Huisman , M.J. Santofimia , R.H. Petrov , J. Sietsma","doi":"10.1016/j.wear.2025.206101","DOIUrl":"10.1016/j.wear.2025.206101","url":null,"abstract":"<div><div>In sparsely populated areas single-track railway lines are still common. Despite the low-density traffic and low axle loads, rail damage is observed to initiate in the rails of these lines. Not only large cracks requiring repair are found, but also newly initiated, post-grinding damage is observed. Rail specimens from the track containing representative damages are extracted to identify the reasons for the damage initiation in the R260Mn steel rail. At the rail surface, three years after the preventive grinding maintenance, the characteristic grinding facets and roughness patterns are still present. White etching layers are observed to surround the residual grinding grooves, maintaining the roughness as a result of the high wear resistance of these layers. The strain orientation at the gauge side of the rail is uni-directional due to lateral creep in the wheel–rail contact while in the center of the contact surface the strain patterns evidence shear stress reversal associated with the bi-directional traffic. The damage initiation mechanism after preventive grinding is associated with low-wear conditions and stresses concentrated around long-lasting grinding grooves. The findings show that preventive grinding maintenance specifications for regional single-stock railway lines must be improved. Specific points of interest are stringent requirements on the number of facets and surface roughness, as well as directions for the removal of corrugation.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"576 ","pages":"Article 206101"},"PeriodicalIF":5.3,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088982","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

Friction reduction and wear resistance properties of electrolytic microtextured surfaces filled with slow-release composite lubricants 缓释复合润滑剂电解微织构表面的减摩和耐磨性

IF 5.3 1区工程技术

Wear Pub Date : 2025-05-16 DOI: 10.1016/j.wear.2025.206133

Zhixiang Liu , Yan Shen , Yunhe Jiang , Baihong Yu , Jie Liu , Chengdi Li

{"title":"Friction reduction and wear resistance properties of electrolytic microtextured surfaces filled with slow-release composite lubricants","authors":"Zhixiang Liu , Yan Shen , Yunhe Jiang , Baihong Yu , Jie Liu , Chengdi Li","doi":"10.1016/j.wear.2025.206133","DOIUrl":"10.1016/j.wear.2025.206133","url":null,"abstract":"<div><div>The refined design of the surface topography is promising to meet the increasing demands for friction reduction and wear resistance. Based on the electrolytic method and hot-pressing process, three kinds of composite lubricants, MoDTC/graphene, MoDTC/epoxy resin and MoDTC/Al(H<sub>2</sub>PO<sub>4</sub>)<sub>3</sub>, were prepared to fill the microtextured surface to consider the slow-release effect. The high-temperature binding properties of Al(H<sub>2</sub>PO<sub>4</sub>)<sub>3</sub> allow a slow-release effect of MoDTC/Al(H<sub>2</sub>PO<sub>4</sub>)<sub>3</sub> composite lubricants, which eventually presents low friction coefficients and wear depths at different temperatures. At 150 °C and 175 °C, the released composite lubricants generate MoS<sub>2</sub> in situ to form a protective lubricating film. At 200 °C, the released MoDTC was consumed to generate molybdenum oxide, weakening the friction reduction effect. The synergistic effect of several aspects, including the ability to trap abrasive debris through the dimples, the tribofilm formed by zinc dialkyldithiophosphate (ZDDP) and the protective power generated by composite lubricants, provides long-lasting low friction and low wear control.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"578 ","pages":"Article 206133"},"PeriodicalIF":5.3,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144184839","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

Finite element analysis of electrical contact fretting wear in 10 % RH air considering the dynamic evolution of debris 考虑碎屑动态演化的10% RH空气中电接触微动磨损有限元分析

IF 5.3 1区工程技术

Wear Pub Date : 2025-05-15 DOI: 10.1016/j.wear.2025.206128

Lihua Chen , Zhichao Chen , Tengfei Ding , Haoqun Li

引用次数: 0

On the applicability of ultrasound flow visualization for the study of erosive wear by solid particles projected from turbulent slurry 超声流动显示技术在紊流浆料中固体颗粒抛射侵蚀磨损研究中的适用性

IF 5.3 1区工程技术

Wear Pub Date : 2025-05-13 DOI: 10.1016/j.wear.2025.206081

Millaray Araya , Ariel Espinoza-Jara , Magdalena Walczak , Andreas Rosenkranz , Wernher Brevis

{"title":"On the applicability of ultrasound flow visualization for the study of erosive wear by solid particles projected from turbulent slurry","authors":"Millaray Araya , Ariel Espinoza-Jara , Magdalena Walczak , Andreas Rosenkranz , Wernher Brevis","doi":"10.1016/j.wear.2025.206081","DOIUrl":"10.1016/j.wear.2025.206081","url":null,"abstract":"<div><div>The study of erosion caused by turbulent flow of slurries is crucial for designing and operating the flow handling systems, predicting their reliability and useful life. This research explores the capacity of ultrasound particle image velocimetry (UPIV) for determining the impact parameters of solid particles projected from turbulent slurry onto a target surface. A slurry pot configuration was employed, and it was equipped with two linear transducers observing the flow at radial and axial planes. Three levels of rotational velocity were tested corresponding to the linear velocity of the moving target of 2.5, 3.0, and 3.5 m/s. For validation, the velocities and angles of individual particle impacts measured by UPIV were analyzed comparatively with analogous information derived by inverse analysis of effective wear scars using two deformation models. Velocity components measured by the two methods are statistically consistent for the two observation planes. The UPIV is concluded to present a new tool for the study of erosive wear with a focus on the slurry-target interface.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"576 ","pages":"Article 206081"},"PeriodicalIF":5.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105549","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

The influence of repeated multiple braking cycles on the evolution of wear degradation of friction blocks 重复多次制动循环对摩擦块磨损退化演化的影响

IF 5.3 1区工程技术

Wear Pub Date : 2025-05-12 DOI: 10.1016/j.wear.2025.206126

Chun Lu , Xiongqiang Liu , Tianlong Sun , Yongquan Deng , Hongqin Liang

{"title":"The influence of repeated multiple braking cycles on the evolution of wear degradation of friction blocks","authors":"Chun Lu , Xiongqiang Liu , Tianlong Sun , Yongquan Deng , Hongqin Liang","doi":"10.1016/j.wear.2025.206126","DOIUrl":"10.1016/j.wear.2025.206126","url":null,"abstract":"<div><div>This article studies the contact pressure and wear distribution of friction blocks during repeated braking processes, as well as the influence of braking duration on friction block wear degradation. Research has found that as the braking duration increases under repeated braking conditions, the wear of the friction block intensifies, and the size of interface damage increases but decreases in quantity. The difference between service conditions and running-in conditions may cause the friction blocks to re-enter the running-in state. During the first braking of repeated braking, the high contact stress area and main wear area of the friction block gradually transfer from the cutting-in end to the center area of the friction block, and finally, under the combined action of thermal expansion, wear behavior, and relative motion, the surface wear of the friction block gradually reaches a dynamic equilibrium state. In the initial stage of the subsequent braking process, the stress concentration phenomenon in the outer ring edge area of the friction block is extremely significant. Under repeated braking conditions, if the duration of each braking is sufficient to bring the friction block to a stable state of dynamic equilibrium, the friction block will exhibit similar wear behavior in subsequent braking conditions.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"576 ","pages":"Article 206126"},"PeriodicalIF":5.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116324","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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