12 results on '"Worn surface"'
Search Results
2. Optimization of wear parameters of Mg-(5.6Ti+3Al)-2.5B4C composite
- Author
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S., Sathish, V., Anandakrishnan, and Manoj, Gupta
- Published
- 2020
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Catalog
3. Wear behaviour of eutectic and hypoeutectic Al‐Si‐Mg‐Ce alloys
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Abu Seman, Anasyida, Razak Daud, Abdul, and Jameelah Ghazali, Mariyam
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- 2013
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4. Tribocorrosion Properties of NiCrAlY Coating in Different Corrosive Environments
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Cong Li, Zhao Siyong, Qiaoling Zheng, Bo Li, Yunchuan Kang, Yimin Gao, Yefei Li, and Hongjian Guo
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Nial ,Materials science ,Tribocorrosion ,chemistry.chemical_element ,Artificial seawater ,Atmospheric-pressure plasma ,02 engineering and technology ,engineering.material ,lcsh:Technology ,Article ,dense structure ,0203 mechanical engineering ,Coating ,corrosion potential ,General Materials Science ,Composite material ,lcsh:Microscopy ,Corrosion current density ,corrosion rate ,lcsh:QC120-168.85 ,computer.programming_language ,lcsh:QH201-278.5 ,lcsh:T ,021001 nanoscience & nanotechnology ,Nickel ,worn surface ,020303 mechanical engineering & transports ,corrosion-wear performance ,chemistry ,lcsh:TA1-2040 ,engineering ,lcsh:Descriptive and experimental mechanics ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,lcsh:Engineering (General). Civil engineering (General) ,0210 nano-technology ,lcsh:TK1-9971 ,computer ,Solid solution - Abstract
Atmospheric plasma spraying (APS) was taken to fabricate the NiCrAlY coating. The corrosion-wear properties of NiCrAlY coating was measured respectively under deionized water, artificial seawater, NaOH solution and HCl solution. Experimental results presented that the as-sprayed NiCrAlY coating consisted of Ni3Al, nickel-based solid solution, NiAl and Y2O3. In deionized water, the coating with the lowest corrosion current density (icorr) of 7.865 ×, 10&minus, 8 A/cm2 was hard to erode. Meanwhile, it presented a lower friction coefficient and the lowest wear rate. In HCl solution, NiCrAlY coating gave the highest corrosion current density (icorr) of 3.356 ×, 6 A/cm2 and a higher wear rate of 6.36 ×, 6 mm3/Nm. Meanwhile, the emergence of Al(OH)3 on the coating surface could reduce the direct contact between the counter ball and sample effectively, which was conducive to the lowest friction coefficient of 0.24. more...
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- 2020
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5. Two Body Abrasive Wear of Al-Mg-Si Hybrid Composites: Effect of Load and Sliding Distance
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Kaushik Nallan Chakravartula and Narasimha Rao Rajamalla
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lcsh:TN1-997 ,two body abrasive wear ,Materials science ,SEM ,Scanning electron microscope ,020209 energy ,Composite number ,Abrasive ,Alloy ,02 engineering and technology ,engineering.material ,wear resistance ,Wear resistance ,worn surface ,two body abrasive wear, hybrid composites, wear resistance, worn surface, SEM ,0202 electrical engineering, electronic engineering, information engineering ,Stir casting ,engineering ,General Materials Science ,Composite material ,hybrid composites ,lcsh:Mining engineering. Metallurgy - Abstract
The present study investigates on the two body abrasive wear behavior of Al-6082 alloy, Al 6082 alloy-10% SiC (Al-SiC) composites and Al 6082 alloy – 5 % SiC-5 % Gr (Al-SiC-Gr) hybrid composites. These composites were prepared by stir casting process. The wear tests of these materials were conducted at load of 5 – 15 N and sliding distance of 50 – 75 m at grit size of 200 µm. The wear response influenced by these parameters was analyzed and compared with each other. The results show that graphitic composites yielded better wear resistance compared to alloy and single SiC reinforced composite. Worn surfaces of samples were observed by using scanning electron microscope (SEM) and it was revealed that the wear grooves appeared to be narrow and shallow in case of hybrid composites.DOI: http://dx.doi.org/10.5755/j01.ms.22.4.12688 more...
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- 2016
6. Tribological Performance of a Ni-Based Composite Coating in Artificial Seawater
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Zhao Siyong, Yunchuan Kang, Li Bo, Yimin Gao, Hongjian Guo, and Cong Li
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Diffraction ,Materials science ,Artificial seawater ,Atmospheric-pressure plasma ,Surfaces and Interfaces ,engineering.material ,Tribology ,Indentation hardness ,Surfaces, Coatings and Films ,Corrosion ,worn surface ,corrosion-wear performance ,grain boundary ,Coating ,lcsh:TA1-2040 ,synergistic mechanism ,Materials Chemistry ,engineering ,Grain boundary ,Composite material ,lcsh:Engineering (General). Civil engineering (General) ,corrosion rate - Abstract
NiCrAlY and NiCrAlY-Mo coatings were fabricated by atmospheric plasma spraying (APS). The corrosion-wear performance of the coatings was investigated in artificial seawater and the synergistic mechanism between wear and corrosion were evaluated in detail. Results showed that the diffraction peaks of Ni3Al shifted to the right and the microhardness of the coating was improved from 329.8 HV to 342.5 HV with adding the Mo element. Meanwhile, the NiCrAlY-Mo coating had a lower friction coefficient, with a wear rate of 0.26 and 3.69 ×, 10&minus, 6 mm3/Nm, compared to the NiCrAlY coating with a wear rate of 0.37 and 4.67 ×, 6 mm3/Nm. The NiCrAlY coating had severe corrosion and the corrosion mainly occurred in grain boundary. Adding the Mo element, the Mo element was distributed in the grain boundary and the coating had a lower corrosion rate and visibly slighter corrosion. The NiCrAlY-Mo coating had excellent corrosion-wear properties in artificial seawater. more...
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- 2019
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7. Metal to Metal Worn Surface of AA6061 Hybrid Composites Casted by Stir Casting Method
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K. PalanikumarK, K. Umanath, D. Niranjanavarma, and S.T. Selvamani
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wear ,Materials science ,Alloy ,Composite number ,chemistry.chemical_element ,engineering.material ,5005 aluminium alloy ,Metal ,chemistry.chemical_compound ,Aluminium ,Silicon carbide ,Aluminium alloy ,Composite material ,Engineering(all) ,SEM ,Metallurgy ,General Medicine ,Worn surface ,stir casting ,AA6061 ,chemistry ,visual_art ,engineering ,visual_art.visual_art_medium ,Stir casting ,hybrid composites - Abstract
Aluminium alloy (AA6061) is reinforced with fine particulates are produced composite and discussed in this work. The reinforced aluminium alloy hybrid metal matrix composites (HMMCs) with 5 to 25% vol. fractions of Silicon Carbide and Aluminium Oxidereinforcements were created by stir casting technique. The metal to metal wear behavior of these hybrid composite and that of un-reinforced alloy was investigated by pin-on-disc wear testing machine. The optical micrographs in use for the micro structure investigation of the hybrid composite show that the Silicon Carbide and Aluminium Oxideparticulates reinforcement are regularly distributed in the matrix materials. The surfaces of the wear area were analyzed by SEM, which are shown that wear surface of the hybrid composite materials was normally much rougher than that of the non-reinforced alloy more...
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- 2014
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8. The effects of graphite, coke and ZnS on the tribological and surface characteristics of automotive brake friction materials
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Nurettin Yavuz, Rukiye Ertan, Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü., Ertan, Rukiye, and Yavuz, Nurettin
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Brake friction materials ,Tribology ,SB2S3 ,Scanning electron microscope ,Brake lining ,Braking systems ,Performance ,Friction surfaces ,Engineering ,Effect of temperature ,Non-asbestos ,Wear ,Braking system ,Brake ,Automotive brake ,Tests and analysis ,Graphite ,Composite material ,Coefficient of friction ,Brake performance ,Lubricants ,Friction Materials ,Brake Linings ,Pad ,Energy dispersive x-ray ,Friction coefficients ,Coke ,Friction layers ,Friction testers ,Physical properties of materials ,Friction materials ,Positive effects ,Surfaces, Coatings and Films ,Surfaces ,Tribological properties ,General Energy ,Scanning electron microscopy ,Materials science ,Friction ,Engineering, mechanical ,Solid lubricants ,Brake linings ,Zinc sulfide ,MOS2 ,Dry lubricant ,Mechanical Engineering ,Wear behaviors ,Worn surface ,Surface characteristics ,Materials properties ,Coefficient of frictions - Abstract
Purpose - The purpose of this paper is to investigate the role of solid lubricants (graphite, coke, ZnS) on brake performance. Design/methodology/approach - In this study, the tribological and surface characteristic of non-asbestos organic type brake friction materials containing three different solid lubricants (graphite, coke, and ZnS) in different proportions were examined and evaluated experimentally. The coefficient of friction (COF) and wear behavior of the samples were tested on a chase-type friction tester, and particular emphases were given to the effect of temperature and number of braking cycles on the COF. Each of the lubricants was added to the mixtures in different amounts and seven different brake linings were manufactured, provided that the total amount of solid lubricants and other ingredients were not changed. The worn surfaces of the specimens were analyzed using a scanning electron microscope with energy-dispersive X-ray microanalysis. Findings - The experimental results indicate that graphite has a positive effect on the tribological properties of brake linings. However, brake linings containing higher concentrations of ZnS and coke showed an unstable friction coefficient relationship with the temperature and number of braking cycles. The formation of friction layers was detected on the friction surface of these samples, which indicates that an increase in coke and ZnS content increases the discontinuous and unstable friction film areas. Originality/value - This paper fulfils the effects of solid lubricants (graphite, coke, ZnS) in brake friction materials with detailed tests and analysis. more...
- Published
- 2011
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9. The microstructure and high temperature wear performance of a nickel base hardfaced coating
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M. Kamaraj and D. Kesavan
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Surface analysis ,Wear resistance ,Tribology ,Dry sliding wear ,Nickel base ,Nickel coatings ,Substrate (electronics) ,Nickel alloys ,Stainless steel ,Coating ,316L ,Nickel ,Materials Chemistry ,Plasma transferred arc ,Stainless steel substrates ,Microstructure ,Welding process ,Surfaces and Interfaces ,Adhesion ,Plasma welding ,Condensed Matter Physics ,Surfaces, Coatings and Films ,Wear of materials ,Wear mechanisms ,Friction and wear ,Hard facing ,Materials science ,High wear resistance ,engineering.material ,Deposited coatings ,Test temperatures ,Sliding distances ,Coatings ,Room temperature ,Metallurgy ,Tribooxidation ,General Chemistry ,Plasma ,High temperature wear ,High temperature ,Sliding wear tests ,Worn surface ,Nickel matrix ,Pin on disc ,engineering ,Higher temperatures ,Pin-on-disc [B] - Abstract
In the present study, influence of microstructure on high temperature dry sliding wear behavior of nickel base hardfaced coating is discussed in detail. Using plasma transferred arc (PTA) welding process, coating of nearly 4 to 5. mm thickness was deposited on 316 L (N) stainless steel substrate without any defects. The as-deposited coating contains large quantity of precipitates (range from 100nm to 20?m in size) in the ?-nickel matrix which increased the hardness significantly. Sliding wear tests were carried out on the coating for different sliding distances at room temperature (RT) and also higher temperature (573. K, and 823. K). Results showed that the wear resistance of coating improved significantly with increase in test temperature, and the high wear resistance was observed at 823. K. The coating exhibited different operating wear mechanisms depending on sliding distances and also test temperature. The wear mechanisms were identified based on friction and wear values along with worn surface analysis. The operating wear mechanisms at 823. K are adhesion at shorter sliding distance and tribo-oxidation at longer sliding distance. � 2010 Elsevier B.V. more...
- Published
- 2010
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10. Determination of the parameters providing optimum tool life by taguchi technique and observation of tool wear in the machining of AISI1050 and AISI4140 steels with the ceramic cutting tools
- Author
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Uludağ Üniversitesi/Teknik Bilimler Meslek Yüksekokulu/Makine Programı., Motorcu, Ali, Rıza, and G-5458-2017
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Machinability ,Takım aşınması ,Control factors ,Predictive tools ,Ceramic cutting tools ,Ceramic tools ,Seramik kesici takım ,Flank wear ,Work pieces ,Taguchi technique ,Engineering ,Hardness ,Second orders ,Ceramic materials ,Sintering ,Manganese Sulfide ,Feed-rates ,Notch wear ,Tool wear ,Taguchi tekniği ,Metal working tools ,Machine tools ,Tool life ,Taguchi ,Effective factors ,Scanning electron microscopes ,Cutting tools ,Predictive equations ,Tool hardness ,Machining ,Worn surface ,Engineering, multidisciplinary ,Wear of materials ,Ceramic cutting tool ,Takım ömrü ,Crater wear ,Cutting speed ,İşlenebilirlik ,Cutting conditions ,Prediction ,Scanning electron microscopy ,Cutting parameters - Abstract
Bu çalışmada, Ç1050 ve Ç4140 çeliklerinin kaplamasız ve kaplamalı seramik kesici takımlarla işlenmesinde, kesme parametreleri ile iş parçası ve takım sertliklerinin, takım ömrü ve takım aşınması üzerindeki etkileri araştırılmıştır. Taguchi Tekniği kullanılarak en yüksek takım ömrü değerlerini veren optimum kontrol faktörleri belirlenmiştir. Tahminsel takım ömrü denklemleri çıkartılmıştır. Ayrıca, aşınmış uçların SEM görüntüleri incelenerek takım aşınma tipleri belirlenmiştir. Deneysel sonuçlar, sırasıyla iş parçası sertliği, kesme hızı, kesme hızı-ilerleme miktarı etkileşimi, kesme hızı-iş parçası sertliği etkileşimi, talaş derinliği-kesici takım sertliği etkileşimi, ilerleme miktarı-iş parçası sertliği etkileşimi ve ilerleme miktarının takım ömrü üzerinde en etkili faktörler olduğunu göstermiştir. Faktör etkileşimlerinin yer aldığı ikinci dereceden tahminsel denklem daha güvenilir sonuçlar vermiştir. Ç1050 ve Ç4140 çeliklerinin seramik takımlarla işlenmesinde çentik, yan kenar ve krater aşınması gözlenmiştir. In this study, the effects of cutting parameters and the effects of workpiece hardness and tool hardness on tool life and tool wear have been investigated in machining of AISI1050 and AISI4140 steels by uncoated and coated ceramic cutting tools. Optimum cutting conditions for maximum tool life were determined using the Taguchi technique. Predictive tool life equations were derived. In addition, types of tool wear were observed by shown worn surfaces with a scanning electron microscope (SEM). The results indicated that the workpiece hardness, cutting speed, cutting speed-feed rate interaction, cutting speed-workpiece hardness interaction, dept of cut-cutting tool hardness interaction, feed rate-workpiece hardness interaction and feed rate were found out to be the most effective factors among control factors on tool life. It is observed that the second order predictive equation provided more reliable results. In machining AISI1050 and AISI4140 steels, notch wear, flank wear and crater wear observed on ceramic tools. Gazi Üniversitesi TEF-07/2003-38 more...
- Published
- 2009
11. Wear of different aluminum matrix composites under conditions that generate a mechanically mixed layer
- Author
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Mario Roberto Rosenberger, Carlos Enrique Schvezov, and Elena Forlerer
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Materials science ,Composite number ,Alloy ,chemistry.chemical_element ,engineering.material ,Matrix (chemical analysis) ,Aluminium ,ALUMINUM MATRIX COMPOSITES ,Materials Chemistry ,Composite material ,Ciencias Químicas ,MECHANICALLY MIXED LAYER ,Surfaces and Interfaces ,WORN SURFACE ,Tribology ,Condensed Matter Physics ,Surfaces, Coatings and Films ,Química Orgánica ,chemistry ,Volume (thermodynamics) ,Mechanics of Materials ,Volume fraction ,DRY SLIDING ,engineering ,STEEL COUNTERFACE ,Order of magnitude ,CIENCIAS NATURALES Y EXACTAS - Abstract
Wear experiments in a pin-on-ring apparatus were performed using aluminum matrix composite, in which the matrix alloy AA6061, was reinforced with Al 2O3, B4C, Ti3Al, and B2Ti in volume fractions ranging from 5% to 15%. The wear conditions generate in all cases a mechanically mixed layer (MML). The results were compared to those obtained with the non-reinforced alloy, which for the same conditions does not form the MML. The improvement of the wear properties was substantial, decreasing the wear rate in two orders of magnitude, result that is independent of volume fraction and nature of the reinforcement. The analysis of the surface and subsurface of the worn samples shows defects and presence of iron in the MML. These results indicate that different type of reinforcement can generate MMLs with similar wear resistance. Moreover, they are used to introduce new elements of analysis for the development of a mechanism of formation of the MML. Fil: Rosenberger, Mario Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales; Argentina Fil: Forlerer, Elena. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales; Argentina Fil: Schvezov, Carlos Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Constituyentes. Departamento de Materiales; Argentina more...
- Published
- 2005
12. Processing and Evaluation of Dry Sliding Wear Behaviour of B4Cp Reinforced Aluminium Matrix Composites
- Author
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G. L. Rajesh, Virupaxi Auradi, S.A. Kori, and Umashankar
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Materials science ,Metal matrix composite ,Metallurgy ,Composite number ,Alloy ,Dry sliding wear ,General Medicine ,Boron carbide ,engineering.material ,Indentation hardness ,Micro hardness ,law.invention ,worn surface ,chemistry.chemical_compound ,Pin-On-Disc tribometer ,Optical microscope ,chemistry ,law ,Volume fraction ,B4C reinforced AMC's ,engineering ,Composite material ,room temperature ,Tribometer - Abstract
The paper reports a study on wear properties of boron carbide reinforced Al metal matrix composite processed via stir casting route at lower temperature of 775 o C using halide salt K 2 TiF 6 with ratio 0.05Ti/B 4 C p to enhance better wettability. Fairly uniform distribution of B 4 C p in the matrix with no segregation is seen and revealed from SEM microphotographs. Micro hardness of the alloy and the composite was determined using Vickers micro hardness tester and found to increase with increase in volume fraction of B 4 C p addition to as cast 6061Al alloy. Pin-On-Disc tribometer was used to analyze wear behaviour of prepared composite and the alloy by applying normal load of 49.05m/s for a sliding velocity ranging from 3.34m/s - 10m/s up to a sliding distance of 565.4m at room temperature. Minimum wear rate was observed for 6061Al+ 6% B 4 C p at sliding velocity of 6.67m/s, normal load of 49.05N with sliding distance of 565.4N compared to 6061Al+ 4% B 4 C p composite and as cast 6061Al alloy. Worn surface were studied using optical microscopy to understand the wear mechanism exhibited by composites prepared. more...
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