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Characterization on Specific Wear Rate of Al Composite Reinforced with nano-Al2O3 Using Taguchi’s Technique 用田口法表征纳米al2o3增强铝复合材料比磨损率
Tribologia: Finnish Journal of Tribology Pub Date : 2023-07-18 DOI: 10.30678/fjt.125959
Md Jalal Uddin Rumi, Muhammad Muzibur Rahman
{"title":"Characterization on Specific Wear Rate of Al Composite Reinforced with nano-Al2O3 Using Taguchi’s Technique","authors":"Md Jalal Uddin Rumi, Muhammad Muzibur Rahman","doi":"10.30678/fjt.125959","DOIUrl":"https://doi.org/10.30678/fjt.125959","url":null,"abstract":"The aim of the investigation was to study and predict wear properties of nano Al2O3 reinforced Al composite fabricated by a two-step stir casting method. A pin-on-disc wear device was used to study the wear characteristics. An L9 Orthogonal array was selected as per Taguchi's method to analyze the results and ANOVA was used to examine the impact of applied force, sliding speed, and duration on specific wear rates with \"smaller the better\" as selection criteria. As per the investigation, applied load significantly influences the particular specific wear rate. Sliding duration is the second most important factor, whereas sliding speed is the factor that has the lowest impact on a given specific wear rate. We created a regression equation with R2 and adj R2 of 99.85% and 99.76% respectively that can estimate the specific wear rate of nano Al2O3 reinforced Al composite. An apple-to-apple comparison between experimental and projected values was built using two confirmation tests, and it revealed an inaccuracy of 2.1% and 6.6%, using a scanning electron microscope. The worn-out surface of the samples with the lowest and greatest specific wear rates was examined and identified with unique oxidation layers and cracks.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46044011","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}
引用次数: 0
Effect of Shot Peening Process on Rolling Contact Fatigue Performance of EN 31 Alloy Steel 喷丸处理对EN 31合金钢滚动接触疲劳性能的影响
Tribologia: Finnish Journal of Tribology Pub Date : 2023-07-18 DOI: 10.30678/fjt.125884
Ranju M R, Kesavan D
{"title":"Effect of Shot Peening Process on Rolling Contact Fatigue Performance of EN 31 Alloy Steel","authors":"Ranju M R, Kesavan D","doi":"10.30678/fjt.125884","DOIUrl":"https://doi.org/10.30678/fjt.125884","url":null,"abstract":"This paper aims to study the effect of shot peening on the Rolling Contact Fatigue (RCF) life of EN 31 Steel subjected to a pure rolling condition. Tests were carried out under lubricated contact conditions using a two-disc on-cylinder test rig. The orthogonal stress distributions and depth of deformation zones under static loading conditions were calculated using an elastic model by Finite Element Analysis (FEA) method. Shot peening increased the surface hardness by 20 % and imparted residual stress, which resulted in a 2-fold improvement of life. The depth of origin of the crack from the sub-surface was found to be in good agreement with the depth of maximum shear region obtained from the finite element model.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46824260","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}
引用次数: 0
Prediction Of The Coefficient Of Friction In The Single Point Incremental Forming Of Truncated Cones From A Grade 2 Titanium Sheet A级钛板截锥单点增量成形的摩擦系数预测
Tribologia: Finnish Journal of Tribology Pub Date : 2023-07-18 DOI: 10.30678/fjt.127844
Marcin Szpunar, T. Trzepieciński
{"title":"Prediction Of The Coefficient Of Friction In The Single Point Incremental Forming Of Truncated Cones From A Grade 2 Titanium Sheet","authors":"Marcin Szpunar, T. Trzepieciński","doi":"10.30678/fjt.127844","DOIUrl":"https://doi.org/10.30678/fjt.127844","url":null,"abstract":"The aim of this paper is to analyze the effect of the process parameters on the coefficient of friction (COF) in the single-point incremental forming process. This investigation may be useful for further FEM analyses where the tool-workpiece contact must be set appropriately to obtain adequate results. The friction was analyzed between a solid tungsten carbide ⌀8 hemispherical ended tool with a radius of 4 mm and a grade 2 pure titanium sheet. As a lubricant, 10W40 engine oil was used. The experiment was of a central composite design and 20 runs in random order were carried out. The influence of input factors, namely spindle speed, tool feed and incremental step depth, was analyzed for the COF response. Two type of equations founded in the literature have been acquired to calculate COF values. An investigation of COF analysis was done for initial tool contact, the first tool full depth contact and stabilized forming region. Additionally, single components of the horizontal force (X-axis and Y-axis) were taken into account. Analysis of variance shows that there is no correlation between the input factors and the COF responses. However, the mean model fitted to the results obtained allows for the prediction of the COF by using the vertical force component and only one horizontal force component. The resulting mean value of the COF between the tool and the workpiece equals 0.4 for Eq. (1) initial contact, stabilized forming: Eq. (1) 0.656 and Eq. (2) 0.469.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43650834","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}
引用次数: 0
Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review 多孔空气静压推力轴承的设计与开发
Tribologia: Finnish Journal of Tribology Pub Date : 2023-07-18 DOI: 10.30678/fjt.125791
MR. Bivash Chakraborty, DR. Prasun Chakraborti
{"title":"Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review","authors":"MR. Bivash Chakraborty, DR. Prasun Chakraborti","doi":"10.30678/fjt.125791","DOIUrl":"https://doi.org/10.30678/fjt.125791","url":null,"abstract":"In several applications demanding precise and ultra-precision movements, porous aerostatic thrust bearings had been employed as a crucial precision engineering component and enabling technology. By acting as a lubricant between the moving part and the stationary part in aerostatic bearings, pressurized air almost completely eliminates friction. Since air acts as the lubricant, oil-based lubricants leave no debris behind. The air prolongs the life of the substances by preventing them from slipping and wearing. The aerostatic type uses graphite as a porous film to disrupt the air uniformly over the surface, or a tiny hole is drilled through the centre of the bearing to let the air circulate and produce a thin layer between the components. With an increased reliance on computational and mathematical methodologies for design and bearing performance optimization, this review paper aims to present the state-of-the-art in aerostatic bearings advancement and research. It also conducts a critical analysis of their future research directions and development trends in the next ten years and beyond. Air bearings are utilized in the production of tools like lathes, CMM, and grinders because they are highly precise in their operation and decrease mistakes and production time. Air bearings are available in a variety of forms and sizes. The assessment of future trends and obstacles in aerostatic bearings investigation, as well as their prospective applications in the precision engineering sectors, concludes the study.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"340 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41258712","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}
引用次数: 0
Influence of the Bowtie Shaped Dimples on the Performance of Sliding Surfaces under Hydrodynamic Lubrication 流体动力润滑条件下领结型凹槽对滑动表面性能的影响
Tribologia: Finnish Journal of Tribology Pub Date : 2023-07-18 DOI: 10.30678/fjt.126885
Hardik Gangadia, S. Sheth
{"title":"Influence of the Bowtie Shaped Dimples on the Performance of Sliding Surfaces under Hydrodynamic Lubrication","authors":"Hardik Gangadia, S. Sheth","doi":"10.30678/fjt.126885","DOIUrl":"https://doi.org/10.30678/fjt.126885","url":null,"abstract":"It covers the tribological behaviour of sliding surfaces, one of which has bowtie-shaped micro-dimples. Against the other fixed, textured wall, one wall is smooth and moving at a constant speed. For the formation of hydrodynamic pressure and tribological behaviour, the effects of bowtie-shaped dimples and orientated bowtie-shaped dimples have been compared with circular-shaped dimples. Additionally, the impact of sliding speed, dimple area density, and dimple depth on tribological behaviour was examined. The findings show that compared to a circular-shaped dimple, an atypical bowtie-shaped and orientated bowtie-shaped dimple generates a higher net hydrodynamic pressure in the fluid domain and offers improved stability between the sliding surfaces. It has been demonstrated that geometrical factors like dimple depth and area density as well as operational factors like sliding speed have a substantial impact on the hydrodynamic average pressure and tribological behaviour of sliding surfaces. The experimental results support the conclusions from the analysis and CFD.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44496799","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}
引用次数: 0
ECOLOGY IN TRIBOLOGY: SELECTED PROBLEMS OFELIMINATING NATURAL OIL-BASED LUBRICANTS FROMMACHINE FRICTION COUPLES 摩擦学中的生态学:从机器摩擦副中去除天然油基润滑剂的选择问题
Tribologia: Finnish Journal of Tribology Pub Date : 2023-06-30 DOI: 10.5604/01.3001.0053.6129
M. Wasilczuk, J. Łubiński, K. Zasińska
{"title":"ECOLOGY IN TRIBOLOGY: SELECTED PROBLEMS OFELIMINATING NATURAL OIL-BASED LUBRICANTS FROMMACHINE FRICTION COUPLES","authors":"M. Wasilczuk, J. Łubiński, K. Zasińska","doi":"10.5604/01.3001.0053.6129","DOIUrl":"https://doi.org/10.5604/01.3001.0053.6129","url":null,"abstract":"The elimination of mineral oil-based lubricants from machines has multiple beneficial effects on the naturalenvironment. Firstly these lubricants are a direct threat to the environment in the event of leaks; secondly their elimination reduces the demand for crude oil from which they are obtained. In addition, in many cases,e.g. when replacing traditional lubricants with water, friction losses in the bearings can also be reduced due tothe lower viscosity of the water, which reduces the energy dissipation in machines.On the other hand, the introduction of self-lubricating materials or water-lubricated bearings causes problemsrelated to the need to adapt the design of machines and materials used to new operating conditions and changedproperties of the lubricants. In the paper, selected examples of problems related to the use of ecologicallubricants are discussed. The high cost of PEEK based polymers resulted in the emergence of cheapersubstitutes on the market; however, in the conducted research, the substitutes presented worse properties thanthose declared by their manufacturers.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"660 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76846058","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}
引用次数: 0
AN EVALUATION OF THE EFFECT OF SILICA DUST ON BRAKEPAD WEAR 二氧化硅粉尘对刹车片磨损影响的评价
Tribologia: Finnish Journal of Tribology Pub Date : 2023-06-30 DOI: 10.5604/01.3001.0053.6126
P. Szczyglak, J. Napiórkowski, Mateusz Sydorczyk
{"title":"AN EVALUATION OF THE EFFECT OF SILICA DUST ON BRAKEPAD WEAR","authors":"P. Szczyglak, J. Napiórkowski, Mateusz Sydorczyk","doi":"10.5604/01.3001.0053.6126","DOIUrl":"https://doi.org/10.5604/01.3001.0053.6126","url":null,"abstract":"The wear of brake pads exposed to silica dust was measured. A novel test stand was developed to analysebrake pads' wear exposed to silica dust. Brake pad wear was determined by measuring pad lining geometryand mass changes. Geometric wear was analysed by determining changes in the thickness of the brake padlining during friction tests. In order to determine changes in mass, the brake pads were weighed before andafter the test. Brake pad wear was evaluated under dust-free conditions and under exposure to silica dust. Thetests revealed significant differences in brake pad wear under dust-free conditions and under exposure to silicadust. Mass loss of brake pad lining at different silica concentrations in airborne dust was described.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75577290","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}
引用次数: 0
EVALUATION OF THE EFFECTS OF ZDDP AND GRAPHENEADDITIVES IN PAO 8 OIL ON THE TRIBOLOGICAL PROPERTIESOF TIALN COATING 评价pao 8油中ZDDP和石墨烯添加剂对涂层摩擦学性能的影响
Tribologia: Finnish Journal of Tribology Pub Date : 2023-06-30 DOI: 10.5604/01.3001.0053.6122
J. Kowalczyk, M. Madej, D. Ozimina
{"title":"EVALUATION OF THE EFFECTS OF ZDDP AND GRAPHENEADDITIVES IN PAO 8 OIL ON THE TRIBOLOGICAL PROPERTIESOF TIALN COATING","authors":"J. Kowalczyk, M. Madej, D. Ozimina","doi":"10.5604/01.3001.0053.6122","DOIUrl":"https://doi.org/10.5604/01.3001.0053.6122","url":null,"abstract":"This paper investigates the tribological effects of graphene and anti-wear zinc dialkyl dithiophosphates(ZDDP). Friction tests have been carried out on a tribological tester which operates as a ball and disc assemblyin a frictional, sliding motion. Tests were carried out with a load of 10 N over a sliding distance of 1000 m.TiAlN coated HS6-5-2C steel discs, and 100Cr6 steel balls were used in the tests. Tests were conducted underlubrication conditions with poly()olefin oil PAO 8 with graphene and/or ZDDP. The chemical compositionof the TiAlN coating was studied using a scanning electron microscope, and the wear marks on the discs andballs were observed. The geometric structure of the samples was analysed before and after the friction testsusing a confocal microscope with interferometric mode. The results indicated that the addition of ZDDP andgraphene to the poly()olefin oil had an effect on reducing the friction coefficient.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84731208","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}
引用次数: 0
THE INFLUENCE OF GRAPHITE ADDITION ON TRIBOLOGICALPROPERTIES OF POLYLACTIDE (PLA) 石墨对聚乳酸(pla)摩擦学性能的影响
Tribologia: Finnish Journal of Tribology Pub Date : 2023-06-30 DOI: 10.5604/01.3001.0053.6123
M. Kujawa, R. Przekop, W. Pawlak, Adam Widuch, Jakub Hanszke
{"title":"THE INFLUENCE OF GRAPHITE ADDITION ON TRIBOLOGICALPROPERTIES OF POLYLACTIDE (PLA)","authors":"M. Kujawa, R. Przekop, W. Pawlak, Adam Widuch, Jakub Hanszke","doi":"10.5604/01.3001.0053.6123","DOIUrl":"https://doi.org/10.5604/01.3001.0053.6123","url":null,"abstract":"Plastics are widely used due to their numerous advantages. Unfortunately, most of their types do not decomposequickly in the natural environment, causing environmental pollution. In order to counteract the problem ofwaste, there is a growing interest in plastics that degrade under the influence of the natural environment.The authors of this article are trying to use biodegradable plastic for sliding elements. Polylactide (PLA)is a biodegradable, environmentally friendly polymer; however, it has a high wear and friction coefficientwhen working with steel. It was decided to check whether the addition of 10% graphite (a commonly used,environmentally friendly modifier) would improve the tribological properties of PLA. Using a pin-on-discstation, the coefficient of friction, wear and temperature of the sample were determined depending on thespeed of cooperation and pressure. The addition of graphite significantly reduced the linear wear of thecomposite in a wide range of parameters (sliding speed and pressure), slightly decreased the coefficient offriction and slightly increased the temperature of the composite.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89128507","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}
引用次数: 0
ANALYSIS OF THE INFLUENCE OF WEAR CRACK OF CHAINDRIVE ON STRESS IN ITS ELEMENTS 链传动磨损裂纹对元件应力的影响分析
Tribologia: Finnish Journal of Tribology Pub Date : 2023-06-30 DOI: 10.5604/01.3001.0053.6125
P. Sokolski
{"title":"ANALYSIS OF THE INFLUENCE OF WEAR CRACK OF CHAINDRIVE ON STRESS IN ITS ELEMENTS","authors":"P. Sokolski","doi":"10.5604/01.3001.0053.6125","DOIUrl":"https://doi.org/10.5604/01.3001.0053.6125","url":null,"abstract":"Pin joints of chain transmissions are areas of stress concentration, which can lead to the formation of cracks inthe links. This process often contributes to a critical weakening of the cross-section in the lugs of these links,which results in its damage and may lead to the failure of the entire drive. The article analyses the influenceof exemplary wear damages of chain transmission elements on the magnitude of stress concentration. Theimpact of the load, crack size, and its location on the level of stress increase was assessed. The location ofcracks in the lugs of chain plates transmission links which lead to the most significant increase in stress levelwas identified.","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81481400","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}
引用次数: 0
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