Tribology International最新文献

{"title":"Effect of Nb content on the tribological properties of laser-cladded Ti-Al-C MAX phase composite coatings","authors":"Honglin Wu ,&nbsp;Huaqiang Xiao ,&nbsp;Nuo Chen ,&nbsp;Mengya Chu ,&nbsp;Bo Lin ,&nbsp;Zhengwen Zhang ,&nbsp;Guang Fu ,&nbsp;Taiqian Mo","doi":"10.1016/j.triboint.2024.110426","DOIUrl":"10.1016/j.triboint.2024.110426","url":null,"abstract":"<div><div>Ti-Al-C-Nb_<em>x</em> (<em>x</em> = 0, 2, 4, 6, and 8 at%) composite coatings are prepared on the surface of TC4 titanium alloy via laser cladding. The effect of Nb content on the microstructure, hardness and tribological properties of the Ti-Al-C-based coatings are investigated. The results show that the coatings are composed of Ti₃Al, TiC, Ti₂AlC, Ti₂AlNb, and Ti₃AlC₂ phases. In the coating with an Nb content of 2 at%, a large amount of flocculent Ti₃AlC₂ phase precipitated. This is attributed to the solid solution of a small amount of Nb into the Ti₃AlC₂ phase, promoting the heterogeneous nucleation of Ti₃AlC₂. With the increase of the Nb content, more Nb atoms are incorporated into the Ti₃AlC₂ phase through solid solution, causing the decomposition of Ti₃AlC₂ into Ti₂AlC and TiC. When the Nb content is 8 at%, the flocculent Ti₃AlC₂ phase almost completely disappeared. The Ti-Al-Nb matrix, hard TiC particles and Ti₃AlC₂ MAX phase form a composite structure with synergistic effects. This enhanced the friction and wear reduction properties of the coatings and reduced the hardness difference between the matrix and the reinforcing phases.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110426"},"PeriodicalIF":6.1,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744354","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":"High-temperature tribological properties of Fe50Mn25Cr5Al15Ti5 iron-based high-entropy alloys","authors":"Tiewei Xu ,&nbsp;Jianyi Li ,&nbsp;Yuan Yu ,&nbsp;Tongyang Li ,&nbsp;Lujie Wang ,&nbsp;Huaguo Tang ,&nbsp;Zhuhui Qiao","doi":"10.1016/j.triboint.2024.110423","DOIUrl":"10.1016/j.triboint.2024.110423","url":null,"abstract":"<div><div>The iron-based high-entropy alloys are poised to become the next generation of high-temperature materials due to their outstanding mechanical properties and cost-effectiveness. In this work, the microstructure, mechanical properties, and tribological behaviors of Fe₅₀Mn₂₅Cr₅Al₁₅Ti₅ iron-based high-entropy alloys are investigated. The grain morphology of Fe₅₀Mn₂₅Cr₅Al₁₅Ti₅ alloy is equiaxed and dominated by BCC structure. Fe₅₀Mn₂₅Cr₅Al₁₅Ti₅ alloy has higher hardness, better resistance to high-temperature softening and superior wear resistance than Hadfield steel (40Mn18Cr3). Within 800 °C, wear rate remains a low order of 10⁻⁵ mm³/N·m. At RT, abrasive wear is the dominant mechanism. At 400 °C, non-dense oxide layer containing unoxidized metal is formed, resulting in delamination, adhesion and abrasion. At 800 °C, a dense wear-resistant oxide glaze layer covers the wear surface.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110423"},"PeriodicalIF":6.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756868","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":"Engineering surface functional groups of 2D organic metal chalcogenides to regulate lubrication performance across scales","authors":"Haowen Luo ,&nbsp;Yaoming Zhang ,&nbsp;Zhuoxuan Lv ,&nbsp;Shaozhen Luo ,&nbsp;Yang Ou ,&nbsp;Huidan Xue ,&nbsp;Guan-E. Wang ,&nbsp;Gang Xu ,&nbsp;Jianxi Liu","doi":"10.1016/j.triboint.2024.110420","DOIUrl":"10.1016/j.triboint.2024.110420","url":null,"abstract":"<div><div>Two-dimensional (2D) layered materials are widely used to enhance lubrication performance in various conditions due to their low friction and sliding interfaces. However, the uncontrolled modification and dispersion of functional groups on 2D materials limit their lubrication performance and ultra-low friction capabilities at different scales. Herein, we developed three Pb-based organic metal chalcogenides nanosheets, Pb(SPh-NH₂/-COOH/-OH), with long-range ordered functional groups on the [PbS₂] layer, to reduce friction and wear across scales. We organically modified these nanosheets prior to exfoliation, achieving micro-lateral and nano-vertical size. As ethanol additives, these nanosheets reduced the coefficient of friction (COF) and wear volume by over 44.8 % and 78.9 %, respectively. Dry tests demonstrated the Pb(SPh-OH) coating on SiO₂/Si substrate reduced the COF from 0.65 to 0.07. Compared to SiO₂/Si substrate, lateral force microscopy revealed friction reducing up to 57.5 %, 85.5 %, and 90.9 % for Pb(SPh-NH₂/-COOH/-OH), respectively. These novel 2D materials provide a heuristic strategy for lubrication, suitable for anti-friction applications under different conditions across scales.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110420"},"PeriodicalIF":6.1,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744352","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 and Wear of Phenolic Composites Reinforced with Halloysite Nanotubes","authors":"Yingying Han ,&nbsp;Ren He ,&nbsp;Huan Li ,&nbsp;Xianqiang Pei ,&nbsp;Ga Zhang","doi":"10.1016/j.triboint.2024.110419","DOIUrl":"10.1016/j.triboint.2024.110419","url":null,"abstract":"<div><div>To decrease the number of interfaces and facilitate the designing of polymer tribo-composites, traditional fillers in phenol-formaldehyde resins (PF) with multiple dimensions and components were replaced with halloysite nanotubes (HNTs). The composites’ tribological performance were studied under a wide range of pv (pressure × speed) conditions. It is revealed that the single incorporation of HNTs significantly lower the friction and wear of PF. In particular, the composites exhibit ultra-low friction and wear under high pv conditions. Mechanism analyses demonstrate that the composites’ tribofilms show distinctly different nanostructures depending on the pv conditions, which was studied thoroughly through morphological and chemical characterizations. Findings of the present work provide new strategies for formulating tribo-composites for applications subjected to harsh sliding conditions.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110419"},"PeriodicalIF":6.1,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744353","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":"On the multi-physics elastoplastic electrical contact of rough surfaces","authors":"You-Hua Li ,&nbsp;Liao-Liang Ke ,&nbsp;Kun Zhou ,&nbsp;Gang-Gang Chang ,&nbsp;Mehmet Ali Güler ,&nbsp;Wei-Wei Shen ,&nbsp;Fei Shen","doi":"10.1016/j.triboint.2024.110418","DOIUrl":"10.1016/j.triboint.2024.110418","url":null,"abstract":"<div><div>Multi-physics coupling effect and elastoplastic deformation of rough surface asperities on contact interfaces are the two critical factors influencing the electrical contact properties. It is challenging to consider both factors in the modeling and efficient computation of rough surface electrical contact problems. To address this challenge, this study proposes a novel and efficient method for the behavior investigation of multi-physics elastoplastic electrical contact of rough surfaces. The electro-thermal and thermo-mechanical coupling equations are derived by incorporating the Joule heating and resultant expansion of material. The J2 plasticity criterion, with both the isotropic and kinematic hardening laws, describes the plastic deformation of contact components. The displacement field caused by the contact pressure of the asperities is calculated using the boundary integral method, while the stresses due to plastic and thermal strains are treated as bulk stresses, and their contribution is solved using the volume integral method. An iterative algorithm is applied to obtain the electrical contact results including electric potential, electrical contact resistance, temperature rise, contact area, contact pressure, displacement, stress, elastic and plastic strains. This method is validated compared with a finite element model. The influence of plastic deformation and multi-physics coupling on the behavior of rough surface electrical contact is investigated.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110418"},"PeriodicalIF":6.1,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744355","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":"Ablation resistance and current-carrying friction performance of WMoCu alloy with different Mo contents","authors":"Xu Wang ,&nbsp;Kexing Song ,&nbsp;Jiang Feng ,&nbsp;Jiandong Xing ,&nbsp;Tao Hang ,&nbsp;Yiming Zhang","doi":"10.1016/j.triboint.2024.110413","DOIUrl":"10.1016/j.triboint.2024.110413","url":null,"abstract":"<div><div>W85Cu15 alloys with different Mo contents of 0, 5, 10 and 15 wt% were fabricated by an infiltration method. The microstructure, comprehensive properties, arc erosion resistance and current-carrying friction properties of WMoCu alloys were studied. The results show that a WMo solid solution has formed between the W phase and the Mo phase, and a clear core-shell structure was found around the W particles in the WMoCu alloy, which improves the interface bonding between Cu and W, thereby enhances the comprehensive properties of the WMoCu alloy. The tensile strength of WMoCu alloy at elevated temperature(600 °C) is 23.8 %∼57.4 % higher than that of WCu alloy. This is due to the good interfacial bonding between the phases in the WMoCu alloy and the high thermal stability of the WMo transition layer. The addition of the element Mo changes the arc erosion behavior, which is related to the fibrous W/Mo phases in the WMoCu alloy. This improves the arc ablation resistance of the WMoCu alloys, prevents concentrated arc erosion, and leaves no ablation pits and microcracks on the erosion surface. Compared with W85Cu15 alloy, the friction coefficient of WMoCu alloy decreases by 2.4 %∼26.1 %, and W70Mo15Cu15 alloy has the lowest wear rate, which is 50 % lower than that of W85Cu15 alloy.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"203 ","pages":"Article 110413"},"PeriodicalIF":6.1,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743364","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 mechanisms of WS2 in humid environments: Investigating H2O adsorption via DFT computations and sliding friction experiments","authors":"Yuqian Huang ,&nbsp;Haiyang Gao ,&nbsp;Kaihuan Yu ,&nbsp;Zhenwei Niu ,&nbsp;Zaixiu Yang ,&nbsp;Bin Zhang ,&nbsp;Kaixiong Gao ,&nbsp;Junyan Zhang ,&nbsp;Ahmet T. Alpas","doi":"10.1016/j.triboint.2024.110416","DOIUrl":"10.1016/j.triboint.2024.110416","url":null,"abstract":"<div><div>Tungsten disulfide is increasingly used for space and nuclear applications owing to its low friction in vacuum, but the friction increases drastically in humid environments. The increased friction has been conventionally attributed to the oxidation of WS₂. This study investigated the frictional behaviour of WS₂ in humid atmospheres through sliding friction experiments combined with density functional theory computations. The results showed that the increased friction can be attributed to the formation of O-H···S type interfacial hydrogen bonds between WS₂ layers by adsorbed H₂O, without significant oxidation. This interaction led to enhanced interlayer bonding and adhesion, consequently elevating friction. This study provides atomistic insights into the friction mechanism of WS₂ and design guidelines for thin films operatable in humid environments.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"203 ","pages":"Article 110416"},"PeriodicalIF":6.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699035","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":"Structure, friction and wear of AlZn5.5MgCu based PEO coatings modified by diamond nanoparticles and silver micropowder","authors":"Elena Torskaya ,&nbsp;Ivan Shkalei ,&nbsp;Alexey Morozov ,&nbsp;Fedor Stepanov ,&nbsp;Vladimir Malyshev ,&nbsp;Alexander Svistkov","doi":"10.1016/j.triboint.2024.110417","DOIUrl":"10.1016/j.triboint.2024.110417","url":null,"abstract":"<div><div>Aluminum alloys, in particular AlZn5.5MgCu, are widely used due to low density. Their tribological properties are poor, plasma electrolytic oxidation (PEO) is often used to improve them. This study proposes modification of PEO coatings, during the formation of which nanodiamonds (ND) and micro dispersed silver were added to electrolyte. A comprehensive method for studying coatings included friction and wear tests at room and elevated temperatures, indentation, and calculating stresses in coated bodies. The failure of coatings with and without modifiers takes place through the mechanism of brittle fracture. The higher the test temperature, the more modifiers must be used to avoid the fracture. Samples with the largest volume of modifiers had COF in the range of 0.34–0.37 at all temperatures.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"203 ","pages":"Article 110417"},"PeriodicalIF":6.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743365","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":"Preparation and tribological properties study of a novel self-lubricating Alumina-based composite coating","authors":"Yiyang Wei ,&nbsp;Zikang Zhu ,&nbsp;Jiwei Zhang ,&nbsp;Yun Xue ,&nbsp;Xiaoqin Zhao ,&nbsp;Jingwei Zhang ,&nbsp;Yulong An","doi":"10.1016/j.triboint.2024.110414","DOIUrl":"10.1016/j.triboint.2024.110414","url":null,"abstract":"<div><div>A self-lubricating composite coating Al₂O₃/C was designed and sprayed via atmospheric plasma spraying (APS), in order to endow the alumina coating with certain lubricating properties under room temperature conditions. The raw feeding powders of boehmite-alumina-graphite (AlO(OH)/Al₂O₃/C) with particle sizes of 30–50 µm were prepared through hydroxylation treatment, physical stirring, and spray granulation process. The tribological properties of the Al₂O₃/C composite coating were systematically studied using a CSM friction tester. The prepared Al₂O₃/C composite coating exhibited fewer defects, lower coefficient of friction (COF), and slighter adhesion wear degree compared to single-component Al₂O₃ coating. The graphite lubrication film was discovered on both the worn surface of the composite coatings and the friction pair after friction. The existence of the graphite lubrication film decreased the COF, and the reduction extent depended on the load, with a maximum reduction of 55 %. The composite coatings presented the best tribological properties when sliding against Si₃N₄ balls at a higher load (5 N) because of the diverse wear mechanisms and the influence of graphite lubrication film, resulting in a reduction in the COF and wear rate by approximately 48 % and 11 times respectively. In addition, part of γ-Al₂O₃ in the Al₂O₃/C composite coating transformed into α-Al₂O₃ after the friction test. But the Al₂O₃ coating remained phase stable, with no phase change occurring before and after the friction. The transformation from the γ-Al₂O₃ to the α-Al₂O₃ phase was positive as for the tribological performance. It could reduce the COF as well as improving the thermal conductivity and mechanical properties of the coating.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"203 ","pages":"Article 110414"},"PeriodicalIF":6.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698936","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":"Improving wear resistance of Ti6Al6V2Sn alloy by reinforcing AlBeSiTiV high-entropy alloy through microwave sintering","authors":"S. Ragunath ,&nbsp;N. Radhika ,&nbsp;S.Aravind Krishna ,&nbsp;Animesh Kumar Basak","doi":"10.1016/j.triboint.2024.110415","DOIUrl":"10.1016/j.triboint.2024.110415","url":null,"abstract":"<div><div>The present study examines the wear performance of microwave-sintered Ti6Al6V2Sn (Ti662) alloy reinforced with 15 wt% AlBeSiTiV High-Entropy Alloy (HEA). The AlBeSiTiV HEA is synthesized by ball milling at 250 rpm for 20 h, resulting in irregular fragments with a mean size of 15 µm and an FCC phase structure. The α-Ti grains decreased with increment of β -Ti grains upon adding HEA reinforcement with the Ti662 alloy. The Ti662/HEA composite exhibited 762 HV microhardness mainly due to refined grains through uniform dissipation in the sintering. The grains sized 0.597 µm on average. The pin-on-disc tribometer is employed to evaluate the wear rate of Ti662/HEA composite under varied process parameters such as applied load, sliding velocity, and sliding distance resulted in enhanced wear resistance through grain refinement, hindering effect, and superior interfacial bonding properties of reinforced HEA particles. Morphological analysis of the worn surfaces reveals wear mechanisms, including delamination, grooves, and the formation of oxide layers. These layers are developed due to the reinforcement of HEA with Ti662 alloy, serving as a protective film over the composite surface against wear.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"203 ","pages":"Article 110415"},"PeriodicalIF":6.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698937","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}