Pub Date : 2024-10-09DOI: 10.1016/j.triboint.2024.110307
Xiaoli Li , Yu Liu , Siyu Liu , Chufeng Sun , Jia Li , Yuchen Sun , Chaoyang Zhang , Shuang Sun , Qiangliang Yu , Bo Yu , Meirong Cai , Feng Zhou , Weimin Liu
Glycerol lubricants face limitations in industrial applications due to their inadequate antimicrobial properties. In this study, a functionalized long-chain quaternary ammonium salt ionic liquid, BTA-16-BTA, was synthesized. The antimicrobial and tribological properties of BTA-16-BTA as a lubricant additive in glycerol media with different water contents were investigated. The results show that the antimicrobial performance of the glycerol medium is positively correlated with the amount of BTA-16-BTA added. At the optimal concentration of 1.5% BTA-16-BTA dispersion, excellent friction-reducing, anti-wear, and extreme pressure properties were observed. The friction-reducing and anti-wear effects were further enhanced when 1% water was added to the system. The liquid medium containing BTA-16-BTA can inhibit the growth of Escherichia coli, indicating that BTA-16-BTA possesses antimicrobial properties.
{"title":"Lubrication and Antibacterial Performance and Mechanism of Functionalized Ionic Liquids in Glycerol Media with Different Water Contents","authors":"Xiaoli Li , Yu Liu , Siyu Liu , Chufeng Sun , Jia Li , Yuchen Sun , Chaoyang Zhang , Shuang Sun , Qiangliang Yu , Bo Yu , Meirong Cai , Feng Zhou , Weimin Liu","doi":"10.1016/j.triboint.2024.110307","DOIUrl":"10.1016/j.triboint.2024.110307","url":null,"abstract":"<div><div>Glycerol lubricants face limitations in industrial applications due to their inadequate antimicrobial properties. In this study, a functionalized long-chain quaternary ammonium salt ionic liquid, BTA-16-BTA, was synthesized. The antimicrobial and tribological properties of BTA-16-BTA as a lubricant additive in glycerol media with different water contents were investigated. The results show that the antimicrobial performance of the glycerol medium is positively correlated with the amount of BTA-16-BTA added. At the optimal concentration of 1.5% BTA-16-BTA dispersion, excellent friction-reducing, anti-wear, and extreme pressure properties were observed. The friction-reducing and anti-wear effects were further enhanced when 1% water was added to the system. The liquid medium containing BTA-16-BTA can inhibit the growth of Escherichia coli, indicating that BTA-16-BTA possesses antimicrobial properties.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110307"},"PeriodicalIF":6.1,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417180","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}
Pub Date : 2024-10-09DOI: 10.1016/j.triboint.2024.110308
Alan Gurt, Michael Khonsari
As a grease is used in a bearing, its rheological properties may change substantially due to prolonged shear, causing it to no longer meet its application requirements. The change to grease structural integrity may be succinctly quantified by measuring the change in consistency, corresponding to shear/mechanical stability. There are only two standardized methods for measuring the mechanical stability of greases: prolonged working in a grease worker and subjecting to roller degradation in a roll stability test.
This paper provides a detailed analysis of the shear environment of these two tests and uses recently identified measurement techniques to track the degradation of two different greases over time in each test. Results are then compared to shearing in a rheometer at shear rates that are estimated to be similar. It is shown that the shearing environments within the grease worker and roll stability test can be predicted and reproduced with reasonable accuracy in a rheometer. Various time scales of mechanical stability are identified, with the standard two-hour duration of the roll stability test found to exist within a transient time scale that may not accurately reflect the long-term mechanical stability of a grease. This study demonstrates that both tools can be used to reasonably estimate the changes to mechanical properties of a grease during the churning phase of a bearing or milling process during manufacturing, though it is recommended that the duration of the standard roll stability test be extended beyond the identified transient period.
{"title":"Analysis of Grease Mechanical Degradation in Standard Equipment","authors":"Alan Gurt, Michael Khonsari","doi":"10.1016/j.triboint.2024.110308","DOIUrl":"10.1016/j.triboint.2024.110308","url":null,"abstract":"<div><div>As a grease is used in a bearing, its rheological properties may change substantially due to prolonged shear, causing it to no longer meet its application requirements. The change to grease structural integrity may be succinctly quantified by measuring the change in consistency, corresponding to shear/mechanical stability. There are only two standardized methods for measuring the mechanical stability of greases: prolonged working in a grease worker and subjecting to roller degradation in a roll stability test.</div><div>This paper provides a detailed analysis of the shear environment of these two tests and uses recently identified measurement techniques to track the degradation of two different greases over time in each test. Results are then compared to shearing in a rheometer at shear rates that are estimated to be similar. It is shown that the shearing environments within the grease worker and roll stability test can be predicted and reproduced with reasonable accuracy in a rheometer. Various time scales of mechanical stability are identified, with the standard two-hour duration of the roll stability test found to exist within a transient time scale that may not accurately reflect the long-term mechanical stability of a grease. This study demonstrates that both tools can be used to reasonably estimate the changes to mechanical properties of a grease during the churning phase of a bearing or milling process during manufacturing, though it is recommended that the duration of the standard roll stability test be extended beyond the identified transient period.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110308"},"PeriodicalIF":6.1,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417096","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}
Five multimajor element CoCrFeNi-X(X = Ti,Sn) high entropy alloys (HEA) were prepared by vacuum hot press sintering. The phase composition, mechanical properties and tribological properties of CoCrFeNi-X(X = Ti,Sn) alloys in simulated seawater were investigated. The phase structure of CoCrFeNiTi high-entropy alloy is solid solution FCC phase, R phase, σ phase, and Laves phase. But after addition Sn elements, the phase structure become the FCC phase and Ni-Sn solid solution phase. CoCrFeNiTi alloy has lower density (7.17 g/cm3) and higher hardness (750 HV) than that of CoCrFeNiSn. The compressive yield strength of CoCrFeNiTi HEA is better than CoCrFeNiSn HEA. The CoCrFeNiSn high-entropy alloys showed lower wear rates. The main reason is that SnO2 is generated on the wear scar surface, which has good wetting and corrosion inhibition effects, so CoCrFeNiSn HEA shows better wear resistance in simulated seawater. The main wear mechanism of the CoCrFeNiSn HEA is abrasive wear, oxidative wear, exfoliation wear and corrosive wear.
{"title":"Mechanical properties of CoCrFeNi-X (X = Ti,Sn) high entropy alloy and tribological properties in simulated seawater environment","authors":"Xinghua Zhang , Zisi Jiang , Hao Chen , Muye Niu , Jun Cheng","doi":"10.1016/j.triboint.2024.110306","DOIUrl":"10.1016/j.triboint.2024.110306","url":null,"abstract":"<div><div>Five multimajor element CoCrFeNi-X(X = Ti,Sn) high entropy alloys (HEA) were prepared by vacuum hot press sintering. The phase composition, mechanical properties and tribological properties of CoCrFeNi-X(X = Ti,Sn) alloys in simulated seawater were investigated. The phase structure of CoCrFeNiTi high-entropy alloy is solid solution FCC phase, R phase, σ phase, and Laves phase. But after addition Sn elements, the phase structure become the FCC phase and Ni-Sn solid solution phase. CoCrFeNiTi alloy has lower density (7.17 g/cm<sup>3</sup>) and higher hardness (750 HV) than that of CoCrFeNiSn. The compressive yield strength of CoCrFeNiTi HEA is better than CoCrFeNiSn HEA. The CoCrFeNiSn high-entropy alloys showed lower wear rates. The main reason is that SnO<sub>2</sub> is generated on the wear scar surface, which has good wetting and corrosion inhibition effects, so CoCrFeNiSn HEA shows better wear resistance in simulated seawater. The main wear mechanism of the CoCrFeNiSn HEA is abrasive wear, oxidative wear, exfoliation wear and corrosive wear.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110306"},"PeriodicalIF":6.1,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434440","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}
Pub Date : 2024-10-09DOI: 10.1016/j.triboint.2024.110312
Jiayu He, Faqin Xie, Xiangqing Wu, Lang Li, Rui Luo, Hanming Yang, Shaoqing Wang
PEO composite coatings doped with ZrO2 and MoS2 particles were prepared on the surface of TC21 alloy using the PEO process. The morphologies and phase compositions of the coatings were analyzed using FE-SEM, TEM, XRD refinement and XPS. The tribological and self-lubricating properties of the coatings were investigated through fretting wear experiments. The results indicate co-doping reduced the friction coefficient by approximately 30 %. The co-doped coating demonstrated higher crystallinity, whereas the ZrO2 coating contained a significant amount of amorphous material. The wear mechanisms of the coating included three-body abrasive, adhesive, and oxidative wear. The self-lubricating properties of the coating were derived from the presence of MoS₂ and the destruction and deformation of the coating surface during fretting wear.
{"title":"Preparation and friction wear performance of ZrO2/MoS2 PEO composite coating","authors":"Jiayu He, Faqin Xie, Xiangqing Wu, Lang Li, Rui Luo, Hanming Yang, Shaoqing Wang","doi":"10.1016/j.triboint.2024.110312","DOIUrl":"10.1016/j.triboint.2024.110312","url":null,"abstract":"<div><div>PEO composite coatings doped with ZrO<sub>2</sub> and MoS<sub>2</sub> particles were prepared on the surface of TC21 alloy using the PEO process. The morphologies and phase compositions of the coatings were analyzed using FE-SEM, TEM, XRD refinement and XPS. The tribological and self-lubricating properties of the coatings were investigated through fretting wear experiments. The results indicate co-doping reduced the friction coefficient by approximately 30 %. The co-doped coating demonstrated higher crystallinity, whereas the ZrO<sub>2</sub> coating contained a significant amount of amorphous material. The wear mechanisms of the coating included three-body abrasive, adhesive, and oxidative wear. The self-lubricating properties of the coating were derived from the presence of MoS₂ and the destruction and deformation of the coating surface during fretting wear.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110312"},"PeriodicalIF":6.1,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434444","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}
Pub Date : 2024-10-09DOI: 10.1016/j.triboint.2024.110313
Xiao Yang , Feilong Huang , Yunbo Wang , Weihua Cao , Jinghan Zheng , Xiaowen Qi
To expand the application of MOFs in self-lubricating composites, we synthesized metal organic frameworks (MOFs) MIL-88A tailored for oleylamine (Ole) adsorption, resulting in the Ole@MIL-88A composite with oleylamine adsorbed. This material was incorporated into epoxy resin (EP) to form EP/Ole@MIL-88A composites. The composites were firstly applied to axle sleeves for tribological evaluations. The tests revealed that the EP/10 wt% Ole@MIL-88A composite had the lowest COF (0.137), with a 65.9 % decrease compared to pure EP. The EP/8 wt% Ole@MIL-88A displayed the lowest wear depth, with a 68.4 % reduction compared to pure EP. This research signifies the initial application of MOF-based self-lubricating composites to mechanical components and engineering evaluations, laying the groundwork for their design in future industrial settings.
{"title":"Tribological application of oleylamine incorporated flexible metal-organic frameworks MIL-88A based self-lubricating composite","authors":"Xiao Yang , Feilong Huang , Yunbo Wang , Weihua Cao , Jinghan Zheng , Xiaowen Qi","doi":"10.1016/j.triboint.2024.110313","DOIUrl":"10.1016/j.triboint.2024.110313","url":null,"abstract":"<div><div>To expand the application of MOFs in self-lubricating composites, we synthesized metal organic frameworks (MOFs) MIL-88A tailored for oleylamine (Ole) adsorption, resulting in the Ole@MIL-88A composite with oleylamine adsorbed. This material was incorporated into epoxy resin (EP) to form EP/Ole@MIL-88A composites. The composites were firstly applied to axle sleeves for tribological evaluations. The tests revealed that the EP/10 wt% Ole@MIL-88A composite had the lowest COF (0.137), with a 65.9 % decrease compared to pure EP. The EP/8 wt% Ole@MIL-88A displayed the lowest wear depth, with a 68.4 % reduction compared to pure EP. This research signifies the initial application of MOF-based self-lubricating composites to mechanical components and engineering evaluations, laying the groundwork for their design in future industrial settings.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110313"},"PeriodicalIF":6.1,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446597","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}
Pub Date : 2024-10-05DOI: 10.1016/j.triboint.2024.110302
Han Yan, Leifeng Shi, Dezhi Zeng, Lin Zhang
Friction damage is always a major threat to the wide application of smart anticorrosion coatings. Here, the tribological properties of a smart Ti3C2Tx-based epoxy coating (MLT@EP) is adjusted by the reasonable collocation of mesoporous silica nanocapsules loading onto Ti3C2Tx-based plane (MLT). MLT@EP not only maintains good smart anticorrosion, but also has remarkable anti-friction and anti-wear properties. Its friction coefficient exhibits a low and steady trend, and the wear rate arrived at 1.14 × 10−5 mm3/N·m, which is decreased by 58.3 ∼ 93.3 % compared to control groups. The excellent tribological properties are mainly attributed to the synergistic effect of MXene-based lubrication film, high resistance to plastic deformation, and strong internal interaction.
{"title":"Tribological properties of a smart Ti3C2Tx-based epoxy coating: Providing an idea to solve the weak tribological properties of traditional smart coatings","authors":"Han Yan, Leifeng Shi, Dezhi Zeng, Lin Zhang","doi":"10.1016/j.triboint.2024.110302","DOIUrl":"10.1016/j.triboint.2024.110302","url":null,"abstract":"<div><div>Friction damage is always a major threat to the wide application of smart anticorrosion coatings. Here, the tribological properties of a smart Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-based epoxy coating (MLT@EP) is adjusted by the reasonable collocation of mesoporous silica nanocapsules loading onto Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-based plane (MLT). MLT@EP not only maintains good smart anticorrosion, but also has remarkable anti-friction and anti-wear properties. Its friction coefficient exhibits a low and steady trend, and the wear rate arrived at 1.14 × 10<sup>−5</sup> mm<sup>3</sup>/N·m, which is decreased by 58.3 ∼ 93.3 % compared to control groups. The excellent tribological properties are mainly attributed to the synergistic effect of MXene-based lubrication film, high resistance to plastic deformation, and strong internal interaction.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110302"},"PeriodicalIF":6.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417149","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}
Pub Date : 2024-10-05DOI: 10.1016/j.triboint.2024.110301
G. Prabu , Che-Hua Yang , Ibrahim A. Alnaser , N. Jeyaprakash
The objective of this research is to assess the degree of wear on the pin across different pitch distances. The Laser Powder Bed Fusion (LPBF) process was utilized to manufacture the CuCrZr alloy, and the microstructural examination revealed both columnar and equiaxed structures in the specimen. A study was conducted on the nanowear occurring in the columnar structure at pitch values of 3 µm (deformed-region), 10 µm (plastic-region), and 20 µm (undeformed-region), while applying a force of 1000µN. The wear depths at these pitch values were 2700 nm, 2300 nm, and 2150 nm, respectively. The ploughing wear mechanism occurred consistently across all three pitch values. The wear rates at the 3 µm, 10 µm, and 20 µm pitch were found to be 1.103 × 10-4, 0.920 × 10-4, and 0.85 × 10-4 mm3N-1m-1, respectively.
{"title":"Analysis of tribological behavior of Laser Powder Bed Fusion (LPBF) CuCrZr alloy through reciprocating loading on the columnar structure","authors":"G. Prabu , Che-Hua Yang , Ibrahim A. Alnaser , N. Jeyaprakash","doi":"10.1016/j.triboint.2024.110301","DOIUrl":"10.1016/j.triboint.2024.110301","url":null,"abstract":"<div><div>The objective of this research is to assess the degree of wear on the pin across different pitch distances. The Laser Powder Bed Fusion (LPBF) process was utilized to manufacture the CuCrZr alloy, and the microstructural examination revealed both columnar and equiaxed structures in the specimen. A study was conducted on the nanowear occurring in the columnar structure at pitch values of 3 µm (deformed-region), 10 µm (plastic-region), and 20 µm (undeformed-region), while applying a force of 1000µN. The wear depths at these pitch values were 2700 nm, 2300 nm, and 2150 nm, respectively. The ploughing wear mechanism occurred consistently across all three pitch values. The wear rates at the 3 µm, 10 µm, and 20 µm pitch were found to be 1.103 × 10<sup>-4</sup>, 0.920 × 10<sup>-4</sup>, and 0.85 × 10<sup>-4</sup> mm<sup>3</sup>N<sup>-1</sup>m<sup>-1</sup>, respectively.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110301"},"PeriodicalIF":6.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417179","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}
Pub Date : 2024-10-05DOI: 10.1016/j.triboint.2024.110297
Tao Yang, Xiongfeng Tang, Zhixue Yan, Guoqing Wang, Gai Zhao, Hanmin Peng
This paper establishes a general computational framework to solve the muti-scale contact problem by integrating the statistical contact model with the finite element format. Compared to existing models, the proposed method is applicable to most geometric configurations and can effectively evaluate the pressure distribution. In this work, a modified Karush-Kuhn-Tucker (KKT) condition is proposed by the assumption that asperity height obeys the Gaussian distribution. Therefore, in the variational formula, the contact contribution is decomposed into body contribution and asperity contribution, corresponding to the nominal smooth surface and roughness, respectively. Then the linearization and constraint enforcement of these two components are derived, followed by a nonlinear Newton-Raphson-based iterative algorithm. The contact patch test and Hertz contact test are conducted, and the predicted results are consistent with the theoretical and experimental values, confirming the effectiveness and accuracy of the proposed approach. It is worth noting that in the Hertz contact test, the contact pressure distribution varies progressively with the roughness level and external force, tending to the Hertz limit or Gaussian limit. This means that the proposed method can be applied to any roughness and load. Finally, the contact behaviors of the transmission interface of a piezoelectric actuator, i.e., a typical multi-scale contact problem, are studied as an engineering application case.
{"title":"Physics-based numerical implementation framework towards multi-scale contact problem","authors":"Tao Yang, Xiongfeng Tang, Zhixue Yan, Guoqing Wang, Gai Zhao, Hanmin Peng","doi":"10.1016/j.triboint.2024.110297","DOIUrl":"10.1016/j.triboint.2024.110297","url":null,"abstract":"<div><div>This paper establishes a general computational framework to solve the muti-scale contact problem by integrating the statistical contact model with the finite element format. Compared to existing models, the proposed method is applicable to most geometric configurations and can effectively evaluate the pressure distribution. In this work, a modified Karush-Kuhn-Tucker (KKT) condition is proposed by the assumption that asperity height obeys the Gaussian distribution. Therefore, in the variational formula, the contact contribution is decomposed into body contribution and asperity contribution, corresponding to the nominal smooth surface and roughness, respectively. Then the linearization and constraint enforcement of these two components are derived, followed by a nonlinear Newton-Raphson-based iterative algorithm. The contact patch test and Hertz contact test are conducted, and the predicted results are consistent with the theoretical and experimental values, confirming the effectiveness and accuracy of the proposed approach. It is worth noting that in the Hertz contact test, the contact pressure distribution varies progressively with the roughness level and external force, tending to the Hertz limit or Gaussian limit. This means that the proposed method can be applied to any roughness and load. Finally, the contact behaviors of the transmission interface of a piezoelectric actuator, i.e., a typical multi-scale contact problem, are studied as an engineering application case.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110297"},"PeriodicalIF":6.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417154","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}
Pub Date : 2024-10-05DOI: 10.1016/j.triboint.2024.110305
Jingfen Lu , Jifan He , Guozheng Kang , Bin Lan , Jianhua Liu , Minhao Zhu
With the widespread implementation of maglev technology in fields such as rail transit and military, it is imperative to investigate the effects of magnetic fields on fretting damage in metallic materials. This study conducted multi-parameter fretting wear tests on typical ferromagnetic counterparts in the presence of an external permanent magnetic field. Subsequently, the wear behavior and damage mechanism of the fretting interface were elucidated through multi-scale characterization analysis. The results indicated that the operation state of the fretting interface was shifted towards the partial slip regime under the magnetic field. Meanwhile, the external magnetic field transformed the dominant wear mechanism from abrasive wear to adhesive wear. The influence of the external magnetic field on fretting wear has been demonstrated to manifest in dual aspects: Firstly, the Hertzian contact stress at the interface is enhanced by the magnetic field induction force, resulting in a remarkable reduction of about 79.83 % in accumulated dissipation energy; Secondly, the effectiveness of debris being expelled from the worn interface decreased, and the wear progression was further impeded by the accumulated debris, so that the abrasion loss is significantly reduced by about 60.66 %. These findings provide valuable theoretical data and practical reference for the protection of fretting damage in ferromagnetic materials under the action of a magnetic field.
{"title":"Effect of external magnetic field on the fretting wear mechanism of the ferromagnetic materials","authors":"Jingfen Lu , Jifan He , Guozheng Kang , Bin Lan , Jianhua Liu , Minhao Zhu","doi":"10.1016/j.triboint.2024.110305","DOIUrl":"10.1016/j.triboint.2024.110305","url":null,"abstract":"<div><div>With the widespread implementation of maglev technology in fields such as rail transit and military, it is imperative to investigate the effects of magnetic fields on fretting damage in metallic materials. This study conducted multi-parameter fretting wear tests on typical ferromagnetic counterparts in the presence of an external permanent magnetic field. Subsequently, the wear behavior and damage mechanism of the fretting interface were elucidated through multi-scale characterization analysis. The results indicated that the operation state of the fretting interface was shifted towards the partial slip regime under the magnetic field. Meanwhile, the external magnetic field transformed the dominant wear mechanism from abrasive wear to adhesive wear. The influence of the external magnetic field on fretting wear has been demonstrated to manifest in dual aspects: Firstly, the Hertzian contact stress at the interface is enhanced by the magnetic field induction force, resulting in a remarkable reduction of about 79.83 % in accumulated dissipation energy; Secondly, the effectiveness of debris being expelled from the worn interface decreased, and the wear progression was further impeded by the accumulated debris, so that the abrasion loss is significantly reduced by about 60.66 %. These findings provide valuable theoretical data and practical reference for the protection of fretting damage in ferromagnetic materials under the action of a magnetic field.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110305"},"PeriodicalIF":6.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417098","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}
Pub Date : 2024-10-05DOI: 10.1016/j.triboint.2024.110255
María-Dolores Avilés, Tomás Caparros, Paloma Mostaza, María-Dolores Bermúdez, Francisco J. Carrión-Vilches
Novel biolubricants based on vegetable avocado oils modified by the ionic liquid diethylmethylammonium methanesulfonate (IL), were investigated. Neat (Av) and epoxidized avocado (EAv) oils with 1 wt% IL were studied in a metal-ceramic tribopair under pin-on-disc configuration. The best tribological performance was found for the EAv+ 1 %IL oil, with higher viscosity, and friction coefficient and wear rate up to 74.5 % and 98.8 % lower than that of neat lubricants. The presence of IL and epoxidized oil tribofilm inside the wear tracks was confirmed using X-ray photoelectronic spectroscopy. These results highlight the potential use of ionic liquids as efficient additives in biolubricant oils.
研究了基于经离子液体二乙基甲基铵甲烷磺酸盐（IL）改性的植物鳄梨油的新型生物润滑剂。在针盘配置下的金属陶瓷摩擦对中研究了含有 1 wt% IL 的纯鳄梨油 (Av) 和环氧化鳄梨油 (EAv)。EAv+ 1 %IL 油的摩擦学性能最佳，粘度更高，摩擦系数和磨损率分别比纯润滑油低 74.5 % 和 98.8 %。使用 X 射线光电子能谱确认了磨损轨迹内存在 IL 和环氧化油三膜。这些结果凸显了离子液体作为生物润滑油高效添加剂的潜在用途。
{"title":"Novel vegetable biolubricants containing ionic liquid","authors":"María-Dolores Avilés, Tomás Caparros, Paloma Mostaza, María-Dolores Bermúdez, Francisco J. Carrión-Vilches","doi":"10.1016/j.triboint.2024.110255","DOIUrl":"10.1016/j.triboint.2024.110255","url":null,"abstract":"<div><div>Novel biolubricants based on vegetable avocado oils modified by the ionic liquid diethylmethylammonium methanesulfonate (IL), were investigated. Neat (Av) and epoxidized avocado (EAv) oils with 1 wt% IL were studied in a metal-ceramic tribopair under pin-on-disc configuration. The best tribological performance was found for the EAv+ 1 %IL oil, with higher viscosity, and friction coefficient and wear rate up to 74.5 % and 98.8 % lower than that of neat lubricants. The presence of IL and epoxidized oil tribofilm inside the wear tracks was confirmed using X-ray photoelectronic spectroscopy. These results highlight the potential use of ionic liquids as efficient additives in biolubricant oils.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"202 ","pages":"Article 110255"},"PeriodicalIF":6.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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