Lubricants最新文献_第9页

An Experimental Study on Ultrasonic Vibration-Assisted Turning of Aluminum Alloy 6061 with Vegetable Oil-Based Nanofluid Minimum Quantity Lubrication 植物油基纳米流体最小量润滑下6061铝合金超声振动辅助车削试验研究

3区工程技术

Lubricants Pub Date : 2023-11-02 DOI: 10.3390/lubricants11110470

Guoliang Liu, Jin Wang, Jintao Zheng, Min Ji, Xiangyu Wang

{"title":"An Experimental Study on Ultrasonic Vibration-Assisted Turning of Aluminum Alloy 6061 with Vegetable Oil-Based Nanofluid Minimum Quantity Lubrication","authors":"Guoliang Liu, Jin Wang, Jintao Zheng, Min Ji, Xiangyu Wang","doi":"10.3390/lubricants11110470","DOIUrl":"https://doi.org/10.3390/lubricants11110470","url":null,"abstract":"Minimum quantity lubrication (MQL) is a potential technology for reducing the consumption of cutting fluids in machining processes. However, there is a need for further improvement in its lubrication and cooling properties. Nanofluid MQL (NMQL) and ultrasonic vibration-assisted machining are both effective methods of enhancing MQL. To achieve an optimal result, this work presents a new method of combining nanofluid MQL with ultrasonic vibration assistance in a turning process. Comparative experimental studies were conducted for two types of turning processes of aluminum alloy 6061, including conventional turning (CT) and ultrasonic vibration-assisted turning (UVAT). For each turning process, five types of lubricating methods were applied, including dry, MQL, nanofluid MQL with graphene nanosheets (GN-MQL), nanofluid MQL with diamond nanoparticles (DN-MQL), and nanofluid MQL with a diamond/graphene hybrid (GN+DN-MQL). A specific cutting energy and areal surface roughness were adopted to evaluate the machinability. The results show that the new method can further improve the machining performance by reducing the specific cutting energy and areal surface roughness, compared with the NMQL turning process and UVAT process. The diamond nanoparticles are easy to embed on the workpiece surface under the UVAT process, which can increase the specific cutting energy and Sa as compared to the MQL method. The graphene nanosheets can produce the interlayer shear effect and be squeezed into the workpiece, thus reducing the specific cutting energy. The results provide a new way for the development of eco-friendly machining.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":"21 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Study of Tool Wear Mechanism Considering the Tool–Chip Interface Temperature during Milling of Aluminum Alloy 考虑刀屑界面温度的铝合金铣削刀具磨损机理研究

3区工程技术

Lubricants Pub Date : 2023-11-02 DOI: 10.3390/lubricants11110471

Xinxin Meng, Youxi Lin, Shaowei Mi, Pengyu Zhang

{"title":"The Study of Tool Wear Mechanism Considering the Tool–Chip Interface Temperature during Milling of Aluminum Alloy","authors":"Xinxin Meng, Youxi Lin, Shaowei Mi, Pengyu Zhang","doi":"10.3390/lubricants11110471","DOIUrl":"https://doi.org/10.3390/lubricants11110471","url":null,"abstract":"ADC12 aluminum alloy has been widely used in the aerospace, ship, and automotive fields because of its high specific strength, excellent die-casting performance, and wear resistance. Adhesion wear is the main wear mechanism of high-speed milling ADC12 aluminum alloy. The most important factor affecting adhesion wear is the tool–chip interface friction, which is directly manifested in the tool–chip interface temperature. Therefore, the temperature variation during the milling of aluminum alloy is analyzed using a temperature field model and infrared temperature measurement technology. Then, the tool wear morphology and the tool wear land width are observed using a scanning electron microscope. Finally, the tool wear mechanism considering the tool–chip interface temperature is discussed. The tool–chip interface temperature is related to the friction angle, tool–chip contact length, and friction force at the rake face, which increases first and then decreases as the cutting speed and feed rate increase. During the formation of the adhesive layer, the tool–chip interface temperature increases, the change rate of the cutting force and the tool wear rate increase, and adhesion, oxidation, and abrasive and delamination wear are generated on the tool surface. With the increase in temperature, the tool wear rate increases, the molten adhesive layer on the tool surface is accompanied by crack propagation, and adhesion wear, oxidation wear, and abrasive wear occur on the tool surface.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":"9 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135934502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Investigating the Wettability, Rheological, and Tribological Properties of Ammonium-Based Protic Ionic Liquids as Neat Lubricants for Steel–Steel and Steel–Aluminium Contacts 氨基质子离子液体作为钢-钢和钢-铝接触纯润滑剂的润湿性、流变性和摩擦学性能研究

3区工程技术

Lubricants Pub Date : 2023-11-01 DOI: 10.3390/lubricants11110469

B. Depu Kumar Patro, P. S. Suvin, Raimondas Kreivaitis, Milda Gumbytė

引用次数: 0

A Review of Electric Potential-Controlled Boundary Lubrication 电位控制边界润滑研究进展

3区工程技术

Lubricants Pub Date : 2023-10-31 DOI: 10.3390/lubricants11110467

Shaowei Li, Chenxu Liu, Wang He, Jie Zhang, Xiaoxi Qiao, Jiang Li, Dong Xiang, Gao Qian, Pengpeng Bai, Yonggang Meng, Yu Tian

{"title":"A Review of Electric Potential-Controlled Boundary Lubrication","authors":"Shaowei Li, Chenxu Liu, Wang He, Jie Zhang, Xiaoxi Qiao, Jiang Li, Dong Xiang, Gao Qian, Pengpeng Bai, Yonggang Meng, Yu Tian","doi":"10.3390/lubricants11110467","DOIUrl":"https://doi.org/10.3390/lubricants11110467","url":null,"abstract":"Tribotronics represents the modulation of friction via an external electric potential, a field with promising ramifications for intelligent devices, precision manufacturing, and biomedical applications. A profound elucidation of mechanisms that allow for potential-controlled friction is foundational to further research in this tribotronic domain. This article provides a comprehensive review of the research progress in electro-controlled friction over the past few decades, approached from the perspective of the boundary lubrication film at the friction interface, a direct influencer of electro-controlled friction performance. The mechanisms of potential-controlled friction are categorized into three distinct classifications, contingent on the formation mode of the boundary lubrication film: potential-induced interfacial redox reactions, interfacial physical adsorption, and interfacial phase structure transformations. Furthermore, an outlook on the application prospects of electro-controlled friction is provided. Finally, several research directions worth exploring in the field of electro-controlled friction are proposed. The authors hope that this article will further promote the application of electro-controlled friction technology in engineering and provide intellectual inspiration for related researchers.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":"108 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135810384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Impact of Water Content on the Superlubricity of Ethylene Glycol Solutions 含水量对乙二醇溶液超润滑性的影响

3区工程技术

Lubricants Pub Date : 2023-10-31 DOI: 10.3390/lubricants11110466

Lvzhou Li, Peng Gong, Pengpeng Bai, Xiangli Wen, Yonggang Meng, Jianning Ding, Yu Tian

{"title":"Impact of Water Content on the Superlubricity of Ethylene Glycol Solutions","authors":"Lvzhou Li, Peng Gong, Pengpeng Bai, Xiangli Wen, Yonggang Meng, Jianning Ding, Yu Tian","doi":"10.3390/lubricants11110466","DOIUrl":"https://doi.org/10.3390/lubricants11110466","url":null,"abstract":"Aqueous solutions of water and ethylene glycol (EG) are prevalently employed in braking, heat transfer, and lubrication systems. However, the precise mechanism through which water content affects the lubricative attributes of EG solutions remains elusive. This research systematically examines the tribological characteristics of EG solutions at varying concentrations using a ceramic–TiAlN friction-pair system. As the concentration of EG increases, the sequential transformation of the associated molecular complex structure in the lubricating medium can be described as follows: [H2O]m·EG → [H2O]m·[EG]n → H2O·[EG]n. Among them, the stoichiometric coefficients “m” and “n” are the simplest mole ratio of H2O and EG in the molecular complex structure, respectively. The most favorable EG concentration was determined to be 50 wt.%. At this concentration, a flexible molecular complex adsorption structure ([H2O]m·[EG]n) with a significant bearing capacity (due to intense hydrogen bonding) forms on the surface of the friction pair, which results in a reduction in the running-in duration and facilitates the achievement of superlubricity, and the coefficient of friction (COF) is about 0.0047. Solutions containing 50 wt.% EG enhance the load-bearing ability and hydrophilicity of the lubricating medium. Moreover, they minimize the roughness of the worn region and curtail the adhesive forces and shear stress at the frictional interface, enabling the realization of superlubricity. Consequently, this research offers valuable insights into the optimal water-to-EG ratio, revealing the mechanism of a superlubricity system that possesses exceptional tribological attributes and holds significant potential for practical applications.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":"96 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135810613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Comparison of Rheological Methods to Measure Grease Degradation 测量油脂降解的流变学方法的比较

3区工程技术

Lubricants Pub Date : 2023-10-31 DOI: 10.3390/lubricants11110468

Alan Gurt, Michael Khonsari

引用次数: 0

Physics-Informed Machine Learning—An Emerging Trend in Tribology 基于物理的机器学习——摩擦学的新兴趋势

3区工程技术

Lubricants Pub Date : 2023-10-30 DOI: 10.3390/lubricants11110463

Max Marian, Stephan Tremmel

{"title":"Physics-Informed Machine Learning—An Emerging Trend in Tribology","authors":"Max Marian, Stephan Tremmel","doi":"10.3390/lubricants11110463","DOIUrl":"https://doi.org/10.3390/lubricants11110463","url":null,"abstract":"Physics-informed machine learning (PIML) has gained significant attention in various scientific fields and is now emerging in the area of tribology. By integrating physics-based knowledge into machine learning models, PIML offers a powerful tool for understanding and optimizing phenomena related to friction, wear, and lubrication. Traditional machine learning approaches often rely solely on data-driven techniques, lacking the incorporation of fundamental physics. However, PIML approaches, for example, Physics-Informed Neural Networks (PINNs), leverage the known physical laws and equations to guide the learning process, leading to more accurate, interpretable and transferable models. PIML can be applied to various tribological tasks, such as the prediction of lubrication conditions in hydrodynamic contacts or the prediction of wear or damages in tribo-technical systems. This review primarily aims to introduce and highlight some of the recent advances of employing PIML in tribological research, thus providing a foundation and inspiration for researchers and R&D engineers in the search of artificial intelligence (AI) and machine learning (ML) approaches and strategies for their respective problems and challenges. Furthermore, we consider this review to be of interest for data scientists and AI/ML experts seeking potential areas of applications for their novel and cutting-edge approaches and methods.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":"55 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136102802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

How Do Substrates Affect the Friction on Graphene at the Nanoscale? 衬底如何影响石墨烯在纳米尺度上的摩擦?

3区工程技术

Lubricants Pub Date : 2023-10-30 DOI: 10.3390/lubricants11110465

Haochen Feng, Ziwen Cheng, Dongxu Long, Tingting Yang, Zhibin Lu, Qichang He

{"title":"How Do Substrates Affect the Friction on Graphene at the Nanoscale?","authors":"Haochen Feng, Ziwen Cheng, Dongxu Long, Tingting Yang, Zhibin Lu, Qichang He","doi":"10.3390/lubricants11110465","DOIUrl":"https://doi.org/10.3390/lubricants11110465","url":null,"abstract":"Substrates supporting two-dimensional materials are omnipresent in micro/nano electromechanical systems. Moreover, substrates are indispensable to all nanotribological experimental systems. However, substrates have rarely been taken into account in first-principles simulations of nanotribological systems. In this work, we investigate the effects of substrates on nanofriction by carrying out first-principles simulations of two systems: (a) one graphene monolayer sliding on another one supported by a metal substrate, denoted as the Gr-Gr/Metal system; and (b) a diatomic tip sliding on a graphene monolayer supported by a metal substrate, named the Tip-Gr/Metal system. Each substrate is made of triatomic layers constituting the minimum period and obtained by cutting a metal through its (111) surface. By varying metal substrates and analyzing the results of the first-principles simulations, it follows that (i) the fluctuation in the sliding energy barriers of the two systems can be modified by changing substrates; (ii) the adsorption type and the pressure affect friction; (iii) the presence of a substrate varies the interfacial binding strength; and (iv) the modulation of friction by substrates lies in altering the interface electron density. These results provide an answer to the important question of how substrates affect the friction on graphene at the nanoscale.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":"294 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136022505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Tribology and Rheology of Polypropylene Grease with MoS2 and ZDDP Additives at Low Temperatures 添加二硫化钼和二硫化钼的聚丙烯润滑脂在低温下的摩擦学和流变学

3区工程技术

Lubricants Pub Date : 2023-10-30 DOI: 10.3390/lubricants11110464

Xinrui Zhao, Chengguang Tian, Lei Hao, Hong Xu, Jinxiang Dong

引用次数: 1

An Investigation on the Teeth Crowning Effects on the Transient EHL Performance of Large-Scale Wind Turbine Spur Gears 大型风力机直齿轮齿冠对瞬态EHL性能影响的研究

3区工程技术

Lubricants Pub Date : 2023-10-29 DOI: 10.3390/lubricants11110462

Hazim U. Jamali, H. S. S. Aljibori, Muhsin Jaber Jweeg, Oday I. Abdullah, Alessandro Ruggiero

{"title":"An Investigation on the Teeth Crowning Effects on the Transient EHL Performance of Large-Scale Wind Turbine Spur Gears","authors":"Hazim U. Jamali, H. S. S. Aljibori, Muhsin Jaber Jweeg, Oday I. Abdullah, Alessandro Ruggiero","doi":"10.3390/lubricants11110462","DOIUrl":"https://doi.org/10.3390/lubricants11110462","url":null,"abstract":"Crowning is applied to wind turbine gears, including spur gears, to ensure adequate stress distribution and contact localization in wind turbine main gearbox gears to improve the gear performance in the presence of misalignments. Each gear tooth is crowned along the face width using a parabolic curve that graduates from a maximum height at the edges and vanishes at the center of the tooth flank. This crowning transfers the elastohydrodynamic contact problem from a line to a point contact case where the surface curvatures and pressure gradient are considered in both directions of the solution space. A wide range of longitudinal crowning heights is considered in this analysis under heavily loaded teeth for typical large-scale wind turbine gears. Furthermore, the variation in the velocities is considered in the analysis. The full transient elastohydrodynamic point contact solution considers the non-Newtonian oil behavior, where the numerical solution is based on the finite difference method. This work is focused on the evaluation of the effectiveness of teeth’s longitudinal crowning in terms of the consequences on the resulting pressure distribution and the corresponding film thickness. The modification of the tooth flank significantly elevates the film thickness levels over the zones close to the tooth edges without a significant increase in the pressure values. Moreover, the zone close to the tooth edges from both sides, where the pressure is expected to drop to the ambient pressure, is extended as a result of the flank modification.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":"69 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136135697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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