Pub Date : 2023-09-05DOI: 10.1080/17515831.2023.2252298
Anoop Gupta, Manpreet Singh, Uma Batra, Sandan Kumar Sharma
ABSTRACT A study on dry sliding wear investigated four alloys: fully austenitized ADI (F-ADI), intercritically austenitized austempered ductile iron (I-ADI), hardened and tempered Boron steel (B-Steel), and hardened and tempered AISI 1045 steel (EN-Steel). Despite their similar hardness levels, these alloys differ in composition and microstructure. Testing was conducted using a Ball-On-Disc setup (ASTM G99-05) with a chrome steel ball, maintaining a constant sliding speed of 0.6 m/s and applying loads between 20 and 80 N. This study aimed to understand the influence of yield strength (σy ), strain hardening coefficient (n), and microstructure on sliding wear under uniform hardness conditions. The findings indicated a strong connection between sliding wear resistance, strain hardening coefficient, toughness, and yield strength. Wear mechanisms varied slightly among materials; F-ADI and I-ADI exhibited deformed layers with increased hardness and oxide formation, while B-Steel and EN-Steel showed micro-cutting and micro-ploughing. F-ADI's high-carbon austenite film and I-ADI's proeutectoid ferrite contributed to improved wear performance. The hardness of the deformation layer on FADI and I-ADI's worn surfaces highlighted the benefits of strain hardening in dry sliding wear. GRAPHICAL ABSTRACT
{"title":"Sliding wear behaviour of austempered ductile iron, boron steel and AISI 1045 steel of similar hardness: effect of microstructure, yield strength, and strain hardening","authors":"Anoop Gupta, Manpreet Singh, Uma Batra, Sandan Kumar Sharma","doi":"10.1080/17515831.2023.2252298","DOIUrl":"https://doi.org/10.1080/17515831.2023.2252298","url":null,"abstract":"ABSTRACT A study on dry sliding wear investigated four alloys: fully austenitized ADI (F-ADI), intercritically austenitized austempered ductile iron (I-ADI), hardened and tempered Boron steel (B-Steel), and hardened and tempered AISI 1045 steel (EN-Steel). Despite their similar hardness levels, these alloys differ in composition and microstructure. Testing was conducted using a Ball-On-Disc setup (ASTM G99-05) with a chrome steel ball, maintaining a constant sliding speed of 0.6 m/s and applying loads between 20 and 80 N. This study aimed to understand the influence of yield strength (σy ), strain hardening coefficient (n), and microstructure on sliding wear under uniform hardness conditions. The findings indicated a strong connection between sliding wear resistance, strain hardening coefficient, toughness, and yield strength. Wear mechanisms varied slightly among materials; F-ADI and I-ADI exhibited deformed layers with increased hardness and oxide formation, while B-Steel and EN-Steel showed micro-cutting and micro-ploughing. F-ADI's high-carbon austenite film and I-ADI's proeutectoid ferrite contributed to improved wear performance. The hardness of the deformation layer on FADI and I-ADI's worn surfaces highlighted the benefits of strain hardening in dry sliding wear. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"9 1","pages":"397 - 411"},"PeriodicalIF":1.3,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74305502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-20DOI: 10.1080/17515831.2023.2246809
F. Aydın
ABSTRACT The demand for magnesium (Mg) alloys is increasing in many industries, such as automotive and aerospace, thanks to their low density and high specific strength. However, the poor tribological performance of Mg alloys is one of the most important disadvantages that limit their widespread use. Researchers have developed different approaches to improve the wear performance of Mg alloys, such as alloying, coatings, surface modifications and composite production. Wear performance of systems with sliding parts are crucial for a lifetime and energy efficiency. The development of Mg matrix composites can significantly reduce energy loss by reducing damage from friction and wear. For this reason, it is crucial to understand the wear behaviour of recent Mg matrix composites. The effect of different parameters such as load, sliding speed, reinforcement content, reinforcement type and temperature on the wear performance of Mg matrix composites were investigated. GRAPHICAL ABSTRACT
{"title":"Tribological aspects of magnesium matrix composites: a review of recent experimental studies","authors":"F. Aydın","doi":"10.1080/17515831.2023.2246809","DOIUrl":"https://doi.org/10.1080/17515831.2023.2246809","url":null,"abstract":"ABSTRACT The demand for magnesium (Mg) alloys is increasing in many industries, such as automotive and aerospace, thanks to their low density and high specific strength. However, the poor tribological performance of Mg alloys is one of the most important disadvantages that limit their widespread use. Researchers have developed different approaches to improve the wear performance of Mg alloys, such as alloying, coatings, surface modifications and composite production. Wear performance of systems with sliding parts are crucial for a lifetime and energy efficiency. The development of Mg matrix composites can significantly reduce energy loss by reducing damage from friction and wear. For this reason, it is crucial to understand the wear behaviour of recent Mg matrix composites. The effect of different parameters such as load, sliding speed, reinforcement content, reinforcement type and temperature on the wear performance of Mg matrix composites were investigated. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"75 1","pages":"363 - 396"},"PeriodicalIF":1.3,"publicationDate":"2023-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83800325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-16DOI: 10.1080/17515831.2023.2245999
Mojtaba Najafizadeh, M. Ghasempour-Mouziraji, Sajad Shahrani, M. Bozorg, C. Goulas, M. Hosseinzadeh, P. Cavaliere, A. Perrone, S. Perrone
ABSTRACT In the present study, the deposition of silicon nitride (Si3N4) coating on Inconel 738 through plasma spray has been investigated. For producing the Si3N4 coating, different times (6, 8 and 10 s), different distances of the plasma spray torch from the substrate (30, 35 and 40 mm) and different currents for plasma spraying (3000, 3250 and 3500 A) were employed. For the characterisation of the coatings, SEM (thickness), XRD, micro-hardness and adhesion of the samples were measured. The coatings’ surface morphology was investigated through SEM. Based on the experimental results, by using a spraying time of 10 s, a distance of the torch of 40 mm and a current of 3500 A, high microhardness and adhesion of the coatings are obtained. On the other hand, the thickness of the coating increased by reducing the distance and increasing spray time and current.
{"title":"Optimization of the Si3N4 coating formation through plasma spraying on Inconel 738","authors":"Mojtaba Najafizadeh, M. Ghasempour-Mouziraji, Sajad Shahrani, M. Bozorg, C. Goulas, M. Hosseinzadeh, P. Cavaliere, A. Perrone, S. Perrone","doi":"10.1080/17515831.2023.2245999","DOIUrl":"https://doi.org/10.1080/17515831.2023.2245999","url":null,"abstract":"ABSTRACT In the present study, the deposition of silicon nitride (Si3N4) coating on Inconel 738 through plasma spray has been investigated. For producing the Si3N4 coating, different times (6, 8 and 10 s), different distances of the plasma spray torch from the substrate (30, 35 and 40 mm) and different currents for plasma spraying (3000, 3250 and 3500 A) were employed. For the characterisation of the coatings, SEM (thickness), XRD, micro-hardness and adhesion of the samples were measured. The coatings’ surface morphology was investigated through SEM. Based on the experimental results, by using a spraying time of 10 s, a distance of the torch of 40 mm and a current of 3500 A, high microhardness and adhesion of the coatings are obtained. On the other hand, the thickness of the coating increased by reducing the distance and increasing spray time and current.","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"34 1","pages":"338 - 351"},"PeriodicalIF":1.3,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74651799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-16DOI: 10.1080/17515831.2023.2245652
Nasim Botshekanan, H. Majidian, M. Farvizi
ABSTRACT The preparation of a thin hard coating is the main challenge in the coating of NiTi articles. To achieve a thin coating of titanium nitride (TiN) on NiTi substrate, physical vapour deposition (PVD) was proposed in this study. Deposition of TiN coating was carried out at the nitrogen flows of 0.79 and 0.93 Pa. Phase composition, thickness, porosity, adhesion strength, hardness, and tribological properties of the TiN coatings were evaluated. The adhesion of the coating to the substrate was acceptable. Increasing of the gas flow resulted in a higher thickness (1 μm), lower porosity and higher adhesion strength. On contrary, the samples prepared with the lower gas flow showed higher hardness and elastic modulus. The coated samples showed smaller width of wear, lower wear rate and lower friction coefficient in comparison to the substrate. The delamination and adhesive wear mechanisms govern the wear process.
{"title":"Thin TiN coating on NiTi substrate through PVD method: improvement of the wear resistance","authors":"Nasim Botshekanan, H. Majidian, M. Farvizi","doi":"10.1080/17515831.2023.2245652","DOIUrl":"https://doi.org/10.1080/17515831.2023.2245652","url":null,"abstract":"ABSTRACT The preparation of a thin hard coating is the main challenge in the coating of NiTi articles. To achieve a thin coating of titanium nitride (TiN) on NiTi substrate, physical vapour deposition (PVD) was proposed in this study. Deposition of TiN coating was carried out at the nitrogen flows of 0.79 and 0.93 Pa. Phase composition, thickness, porosity, adhesion strength, hardness, and tribological properties of the TiN coatings were evaluated. The adhesion of the coating to the substrate was acceptable. Increasing of the gas flow resulted in a higher thickness (1 μm), lower porosity and higher adhesion strength. On contrary, the samples prepared with the lower gas flow showed higher hardness and elastic modulus. The coated samples showed smaller width of wear, lower wear rate and lower friction coefficient in comparison to the substrate. The delamination and adhesive wear mechanisms govern the wear process.","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"68 1","pages":"324 - 337"},"PeriodicalIF":1.3,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72832751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-16DOI: 10.1080/17515831.2023.2246757
Shubham Gupta, Subhodip Chatterjee, Ayush Malviya, A. Chanda
ABSTRACT The traction performance of the footwear deteriorates due to outsole wear which further increases the risk of slip and fall related accidents. To date, several studies have tested footwear tractions across several slippery conditions but only a few studies have attempted to assess their performance considering worn shoes. In this work, nine outsoles, with systematically modified tread geometries, were investigated, to study the effects of tread patterns in new and worn conditions on traction, across common slippery conditions. The outsoles were progressively worn in three wear cycles. Outsoles with increased worn regions generated lower friction and higher fluid pressures, indicating increased slipping risks. Also, diversion of fluid flow due to large worn regions produced high fluid accumulations at other locations over the outsoles. The methods and results are anticipated to help footwear manufacturers with the strategic design of tread patterns that can provide improved friction even when completely worn. GRAPHICAL ABSTRACT
{"title":"Traction performance modeling of worn footwear with perpendicular treads","authors":"Shubham Gupta, Subhodip Chatterjee, Ayush Malviya, A. Chanda","doi":"10.1080/17515831.2023.2246757","DOIUrl":"https://doi.org/10.1080/17515831.2023.2246757","url":null,"abstract":"ABSTRACT The traction performance of the footwear deteriorates due to outsole wear which further increases the risk of slip and fall related accidents. To date, several studies have tested footwear tractions across several slippery conditions but only a few studies have attempted to assess their performance considering worn shoes. In this work, nine outsoles, with systematically modified tread geometries, were investigated, to study the effects of tread patterns in new and worn conditions on traction, across common slippery conditions. The outsoles were progressively worn in three wear cycles. Outsoles with increased worn regions generated lower friction and higher fluid pressures, indicating increased slipping risks. Also, diversion of fluid flow due to large worn regions produced high fluid accumulations at other locations over the outsoles. The methods and results are anticipated to help footwear manufacturers with the strategic design of tread patterns that can provide improved friction even when completely worn. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"2 1","pages":"352 - 362"},"PeriodicalIF":1.3,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87422808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-16DOI: 10.1080/17515831.2023.2232990
Seyed Hossein Mirhosseini, M. Mosallaee, M. Razavi, M. Fotouhi
ABSTRACT This paper aims to study the effect of adding different SiC content on the wear performance of Al2O3-TiB2-SiC ternary composite coatings produced by the air plasma spraying process. The study used SHS powders as primary materials, consisting of H3BO3, Al, and TiO2, and 5, 10, and 15 Vol.% SiC. The microstructure and wear specifications of the coatings were characterised using FESEM, microhardness, and pin-on-disk methods. The results showed that the addition of SiC led to higher hardness and lower wear track width and rate compared to Al2O3-TiB2 composite coatings. The best wear behaviour was observed in Al2O3-TiB2-10%SiC and 15 wt% SiC composite coatings. The main wear mechanisms were found to be brittle fracture, delamination and adhesive for all samples. GRAPHICAL ABSTRACT
{"title":"Plasma-sprayed Al2O3-TiB2-SiC ternary composite coatings and its wear behaviour based on SiC content","authors":"Seyed Hossein Mirhosseini, M. Mosallaee, M. Razavi, M. Fotouhi","doi":"10.1080/17515831.2023.2232990","DOIUrl":"https://doi.org/10.1080/17515831.2023.2232990","url":null,"abstract":"ABSTRACT This paper aims to study the effect of adding different SiC content on the wear performance of Al2O3-TiB2-SiC ternary composite coatings produced by the air plasma spraying process. The study used SHS powders as primary materials, consisting of H3BO3, Al, and TiO2, and 5, 10, and 15 Vol.% SiC. The microstructure and wear specifications of the coatings were characterised using FESEM, microhardness, and pin-on-disk methods. The results showed that the addition of SiC led to higher hardness and lower wear track width and rate compared to Al2O3-TiB2 composite coatings. The best wear behaviour was observed in Al2O3-TiB2-10%SiC and 15 wt% SiC composite coatings. The main wear mechanisms were found to be brittle fracture, delamination and adhesive for all samples. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"3 1","pages":"309 - 323"},"PeriodicalIF":1.3,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88233477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-03DOI: 10.1080/17515831.2023.2232991
E. Georgiou, D. Drees, L. M. Lopes, M. De Bilde, A. Koutsomichalis
ABSTRACT In the wind turbine industry, mechanical components sometimes have to operate under starved lubrication. This occurs mainly after maintenance and/or repairing procedures, when the wind turbine is starting up again after a prolonged inactive period. In field observations have shown that oil starvation is more prominent in warmer climates and of course for longer durations where the mechanical components remained ‘inactive’. To get a better insight on this issue, a validation test procedure was developed based on reciprocating sliding tests. This protocol was used to investigate the starvation behaviour of two commercially available oils on metallic components, which were exposed at different temperatures (ranging from −20° to 40°C) and durations (ranging from 5 to 21 days). Based on these tests the resistance to starvation (failure time) and the effect of critical waiting time and temperature to initiate starvation were assessed.
{"title":"Investigating the effect of temperature and time on the starvation of lubricants for the wind turbine industry","authors":"E. Georgiou, D. Drees, L. M. Lopes, M. De Bilde, A. Koutsomichalis","doi":"10.1080/17515831.2023.2232991","DOIUrl":"https://doi.org/10.1080/17515831.2023.2232991","url":null,"abstract":"ABSTRACT In the wind turbine industry, mechanical components sometimes have to operate under starved lubrication. This occurs mainly after maintenance and/or repairing procedures, when the wind turbine is starting up again after a prolonged inactive period. In field observations have shown that oil starvation is more prominent in warmer climates and of course for longer durations where the mechanical components remained ‘inactive’. To get a better insight on this issue, a validation test procedure was developed based on reciprocating sliding tests. This protocol was used to investigate the starvation behaviour of two commercially available oils on metallic components, which were exposed at different temperatures (ranging from −20° to 40°C) and durations (ranging from 5 to 21 days). Based on these tests the resistance to starvation (failure time) and the effect of critical waiting time and temperature to initiate starvation were assessed.","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"17 1","pages":"179 - 186"},"PeriodicalIF":1.3,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45757507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-03DOI: 10.1080/17515831.2023.2246211
S. Bhaumik
Systematic planning of an activity is a key factor for the success of any event. It is well said that ‘If Well planned, 90% of the work is completed’. But planning a successful activity depends on how sustainable the solutions would be. For machinery too, the maintenance planning is to be sustainable, particularly the lubrication. Additionally, with the concern of the environment now industries are looking for sustainable but environment-friendly economical solutions. Lubricants which form one of the major mechanical elements need to be taken into high consideration. However, it is important to understand the role of these lubricants in mechanical applications and choose the correct lubricant for specific applications. The special issue focuses on various tribological systems from nano to macro scale. This issue brings together interesting contributions both from industry and academia covering applications such as wind turbines, nano-bio-lubricants, self-lubricating nanocomposites, coatings, and natural composite brake pads. The topics covered diverse topics highlighting innovative scientific approaches covering modern lubrication techniques. The special issue is divided into two sections: initial articles focus on the lubrication aspects of industrial applications and later articles focus on the composites and coatings, thus, covering several dimensions in the field of tribology. The issue begins with an interesting manuscript ‘Investigating the effect of temperature and time on the starvation of lubricants for the wind turbine industry’ where Georgiou et al. developed a validation test procedure and reported the effect of temperature and time on lubrication starvation in windmills. Sustainable lubricants are the need of the hour. Biodegradable lubricants are lubricants of interest to the environmental policies of all nations. In ‘Performance Assessment of Some Selected Vegetable Oils as Lubricants in Turning of AISI 1045 Steel Using a Taguchi-Based Grey Relational Analysis Approach’, Abegunde et al. reported the efficacy of vegetable oil in turning AISI 1045. The incorporation of nanotechnology in lubricants had exhibited an improvement in the tribological properties of lubricants. Srivyas et al. evaluated the tribological properties of a hybrid nanoparticle added poly alpha olefin oils in ‘Enhanced Extreme Pressure and Tribological Performance of Hybrid Nano Lubricant’ and reported a significant reduction in frictional coefficient. Furthermore, in ‘Tribological Evaluation of Rice Bran Oil Based Ionanolubricants Containing Ionic Liquids and Nanoparticles’. Garg et al. reported an improvement in the tribological properties of rice bran oil by introducing ionic liquids along with nanoparticles. Recent advances in self-lubricating composites have also been an area of interest in this issue. In several applications, composites need to be wear-resistant and one of the most exciting topics is self-lubricating composites. ‘Investigations on the temper
{"title":"Editorial for the special issue on Sustainable Lubrication","authors":"S. Bhaumik","doi":"10.1080/17515831.2023.2246211","DOIUrl":"https://doi.org/10.1080/17515831.2023.2246211","url":null,"abstract":"Systematic planning of an activity is a key factor for the success of any event. It is well said that ‘If Well planned, 90% of the work is completed’. But planning a successful activity depends on how sustainable the solutions would be. For machinery too, the maintenance planning is to be sustainable, particularly the lubrication. Additionally, with the concern of the environment now industries are looking for sustainable but environment-friendly economical solutions. Lubricants which form one of the major mechanical elements need to be taken into high consideration. However, it is important to understand the role of these lubricants in mechanical applications and choose the correct lubricant for specific applications. The special issue focuses on various tribological systems from nano to macro scale. This issue brings together interesting contributions both from industry and academia covering applications such as wind turbines, nano-bio-lubricants, self-lubricating nanocomposites, coatings, and natural composite brake pads. The topics covered diverse topics highlighting innovative scientific approaches covering modern lubrication techniques. The special issue is divided into two sections: initial articles focus on the lubrication aspects of industrial applications and later articles focus on the composites and coatings, thus, covering several dimensions in the field of tribology. The issue begins with an interesting manuscript ‘Investigating the effect of temperature and time on the starvation of lubricants for the wind turbine industry’ where Georgiou et al. developed a validation test procedure and reported the effect of temperature and time on lubrication starvation in windmills. Sustainable lubricants are the need of the hour. Biodegradable lubricants are lubricants of interest to the environmental policies of all nations. In ‘Performance Assessment of Some Selected Vegetable Oils as Lubricants in Turning of AISI 1045 Steel Using a Taguchi-Based Grey Relational Analysis Approach’, Abegunde et al. reported the efficacy of vegetable oil in turning AISI 1045. The incorporation of nanotechnology in lubricants had exhibited an improvement in the tribological properties of lubricants. Srivyas et al. evaluated the tribological properties of a hybrid nanoparticle added poly alpha olefin oils in ‘Enhanced Extreme Pressure and Tribological Performance of Hybrid Nano Lubricant’ and reported a significant reduction in frictional coefficient. Furthermore, in ‘Tribological Evaluation of Rice Bran Oil Based Ionanolubricants Containing Ionic Liquids and Nanoparticles’. Garg et al. reported an improvement in the tribological properties of rice bran oil by introducing ionic liquids along with nanoparticles. Recent advances in self-lubricating composites have also been an area of interest in this issue. In several applications, composites need to be wear-resistant and one of the most exciting topics is self-lubricating composites. ‘Investigations on the temper","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"17 1","pages":"177 - 178"},"PeriodicalIF":1.3,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44770817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-03DOI: 10.1080/17515831.2023.2243426
A. Radhamani, S. Bhaumik, H. Lau, M. Kamaraj, S. Ramakrishna
ABSTRACT Herein, we report the tribological behaviour of CNT-304 stainless steel composites at room (28°C) and high temperatures (200°C). Nanocomposites of various CNT concentrations, namely 0.2, 0.5, 1.0, 2.0, 3.0, and 4.0 wt%, were prepared. A significant amount of grain refinement resulted in an increase in CNT loading. A tribological study was carried out at 28°C and 200°C. Wear resistance was found to enhance with an increase in CNT concentration at both temperatures. However, a slightly higher wear rate was observed at 200°C for the samples with CNT content < 3 wt% than their corresponding low-temperature values. About 86%, 91% drop-in wear rate was seen in 2.0 wt% CNT-304 SS, and 4.0 wt% CNT-304SS, respectively, as compared to pure SS at 28°C, which is 54% and 88% decrease at 200°C and is very promising. The decrease in wear volume with CNT content at both temperatures can be ascribed to the self-lubricating and reinforcing nature of CNTs in the metal matrix composites. Severe abrasive wear in the pristine SS samples was slowly changed to mild abrasive and lubricated wear in composites. A systematic study on the tribological behaviour of CNT-SS composites can shed light on the benefits and detriments of using them for various applications. Highlights Incorporation of CNTs into 304 SS matrix caused grain refinement. Wear rate decreased with CNT content and 4.0 wt% CNT-SS showed minimum wear rate while pristine gave the maximum at both 28°C and 200°C. About 86% and 54% decrease in wear rate were observed for 2.0 wt% CNT-304 SS at 28°C and 200°C respectively as compared to the pristine 304 SS sample. Wear rate at 200°C was slightly more than that of room temperature (28°C) for CNT content < 3 wt%. The 3.0 wt% CNT-304 SS and 4.0 wt% CNT-304 SS showed nearly the same wear rate at both ambient and 200°C test. GRAPHICAL ABSTRACT
{"title":"Investigations on the temperature-dependent tribological behaviour of spark plasma sintered CNT-304 SS self-lubricating nanocomposites","authors":"A. Radhamani, S. Bhaumik, H. Lau, M. Kamaraj, S. Ramakrishna","doi":"10.1080/17515831.2023.2243426","DOIUrl":"https://doi.org/10.1080/17515831.2023.2243426","url":null,"abstract":"ABSTRACT Herein, we report the tribological behaviour of CNT-304 stainless steel composites at room (28°C) and high temperatures (200°C). Nanocomposites of various CNT concentrations, namely 0.2, 0.5, 1.0, 2.0, 3.0, and 4.0 wt%, were prepared. A significant amount of grain refinement resulted in an increase in CNT loading. A tribological study was carried out at 28°C and 200°C. Wear resistance was found to enhance with an increase in CNT concentration at both temperatures. However, a slightly higher wear rate was observed at 200°C for the samples with CNT content < 3 wt% than their corresponding low-temperature values. About 86%, 91% drop-in wear rate was seen in 2.0 wt% CNT-304 SS, and 4.0 wt% CNT-304SS, respectively, as compared to pure SS at 28°C, which is 54% and 88% decrease at 200°C and is very promising. The decrease in wear volume with CNT content at both temperatures can be ascribed to the self-lubricating and reinforcing nature of CNTs in the metal matrix composites. Severe abrasive wear in the pristine SS samples was slowly changed to mild abrasive and lubricated wear in composites. A systematic study on the tribological behaviour of CNT-SS composites can shed light on the benefits and detriments of using them for various applications. Highlights Incorporation of CNTs into 304 SS matrix caused grain refinement. Wear rate decreased with CNT content and 4.0 wt% CNT-SS showed minimum wear rate while pristine gave the maximum at both 28°C and 200°C. About 86% and 54% decrease in wear rate were observed for 2.0 wt% CNT-304 SS at 28°C and 200°C respectively as compared to the pristine 304 SS sample. Wear rate at 200°C was slightly more than that of room temperature (28°C) for CNT content < 3 wt%. The 3.0 wt% CNT-304 SS and 4.0 wt% CNT-304 SS showed nearly the same wear rate at both ambient and 200°C test. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"17 1","pages":"224 - 236"},"PeriodicalIF":1.3,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41680568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-03DOI: 10.1080/17515831.2023.2237810
A. G. Joshi, Bharath, S. Basavarajappa
ABSTRACT Brake pads are vital parts of automobiles, where tribological properties are prime concern. Usually, asbestos brake pads were used, which were replaced by copper-based in later years. As brake lining materials have evolved, synthetic friction composites were explored as alternatives. Recent works suggest that, natural composites are promising friction material. However, poor thermal conductivity and frictional stability have limited their applications. Surface treatment of fibers and addition of secondary fillers have improved their possibilities. Thus, hybridization of reinforcements has expanded their range of applications. The present article attempts to review various aspects of brake pads and their testing with attention on natural composites. Their properties were studied to conform their ability to meet desired requirements. The article reviews the studies conducted in recent years on various materials properties related to brake pads. The future potential of natural components in the development of friction composite materials for automotive applications is highlighted.
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