The Experts below are selected from a list of 4476 Experts worldwide ranked by ideXlab platform
S Brusethaug - One of the best experts on this subject based on the ideXlab platform.
-
tribological behavior of al si sicp composites automobile Brake Pad system under dry sliding conditions
Tribology International, 2007Co-Authors: R K Uyyuru, M K Surappa, S BrusethaugAbstract:Tribological behavior of stir-cast $Al-Si/SiC_p$ composites against automobile Brake Pad material was studied using Pin-on-Disc tribo-tester. The Al-metal matrix composite (Al-MMC) material was used as disc, whereas the Brake Pad material forms the pin. It has been found that both wear rate and friction coefficient vary with both applied normal load and sliding speed. With increase in the applied normal load, the wear rate was observed to increase whereas the friction coefficient decreases. However, both the wear rate and friction coefficients were observed to vary proportionally with the sliding speed. During the wear tests, formation of a tribo-layer was observed, presence of which can affect the wear behavior, apart from acting as a source of wear debris. Tribo-layer formed over the worn disc surfaces was found to be heterogeneous in nature. Morphology and topography of worn surfaces and debris were studied using scanning electron microscope (SEM). Chemical composition of different wear products was obtained using electron probe micro analyzer (EPMA) and X-ray diffraction (XRD) techniques. Possible wear mechanisms operative in Al-MMC-Brake Pad tribo-couple have been discussed.
-
tribological behavior of al si sicp composites automobile Brake Pad system under dry sliding conditions
Tribology International, 2007Co-Authors: R K Uyyuru, M K Surappa, S BrusethaugAbstract:Tribological behavior of stir-cast $Al-Si/SiC_p$ composites against automobile Brake Pad material was studied using Pin-on-Disc tribo-tester. The Al-metal matrix composite (Al-MMC) material was used as disc, whereas the Brake Pad material forms the pin. It has been found that both wear rate and friction coefficient vary with both applied normal load and sliding speed. With increase in the applied normal load, the wear rate was observed to increase whereas the friction coefficient decreases. However, both the wear rate and friction coefficients were observed to vary proportionally with the sliding speed. During the wear tests, formation of a tribo-layer was observed, presence of which can affect the wear behavior, apart from acting as a source of wear debris. Tribo-layer formed over the worn disc surfaces was found to be heterogeneous in nature. Morphology and topography of worn surfaces and debris were studied using scanning electron microscope (SEM). Chemical composition of different wear products was obtained using electron probe micro analyzer (EPMA) and X-ray diffraction (XRD) techniques. Possible wear mechanisms operative in Al-MMC-Brake Pad tribo-couple have been discussed.
-
effect of reinforcement volume fraction and size distribution on the tribological behavior of al composite Brake Pad tribo couple
Wear, 2006Co-Authors: R K Uyyuru, M K Surappa, S BrusethaugAbstract:Tribological behavior of aluminium matrix composite (AMC)/Brake Pad tribo-couple under dry sliding conditions was studied using Pin-on-Disc machine. Brake Pad material was used as pins while the AMC formed the rotating disc. Series of experiments were performed to characterize the tribological nature of the tribo-couple. Load and sliding speeds were varied over a range to represent actual braking conditions in passenger cars. Effect of volume fraction and size distribution of reinforcement on wear and friction coefficient has been studied. It was observed that a heterogeneous tribo-layer was formed over the worn surfaces during the wear tests. Presence of tribo-layer was believed to cause two effects: acting as a lubricant layer and acting as a source of wear debris. Morphology and topography of worn surfaces and debris were studied using scanning electron microscope (SEM), electron probe micro analyzer (EPMA), and X-ray diffraction (XRD) techniques. When the reinforcement in the matrix has wide size distribution, wear rate and friction coefficients are found to be higher compared to composite containing mono-size reinforcement.
R K Uyyuru - One of the best experts on this subject based on the ideXlab platform.
-
tribological behavior of al si sicp composites automobile Brake Pad system under dry sliding conditions
Tribology International, 2007Co-Authors: R K Uyyuru, M K Surappa, S BrusethaugAbstract:Tribological behavior of stir-cast $Al-Si/SiC_p$ composites against automobile Brake Pad material was studied using Pin-on-Disc tribo-tester. The Al-metal matrix composite (Al-MMC) material was used as disc, whereas the Brake Pad material forms the pin. It has been found that both wear rate and friction coefficient vary with both applied normal load and sliding speed. With increase in the applied normal load, the wear rate was observed to increase whereas the friction coefficient decreases. However, both the wear rate and friction coefficients were observed to vary proportionally with the sliding speed. During the wear tests, formation of a tribo-layer was observed, presence of which can affect the wear behavior, apart from acting as a source of wear debris. Tribo-layer formed over the worn disc surfaces was found to be heterogeneous in nature. Morphology and topography of worn surfaces and debris were studied using scanning electron microscope (SEM). Chemical composition of different wear products was obtained using electron probe micro analyzer (EPMA) and X-ray diffraction (XRD) techniques. Possible wear mechanisms operative in Al-MMC-Brake Pad tribo-couple have been discussed.
-
tribological behavior of al si sicp composites automobile Brake Pad system under dry sliding conditions
Tribology International, 2007Co-Authors: R K Uyyuru, M K Surappa, S BrusethaugAbstract:Tribological behavior of stir-cast $Al-Si/SiC_p$ composites against automobile Brake Pad material was studied using Pin-on-Disc tribo-tester. The Al-metal matrix composite (Al-MMC) material was used as disc, whereas the Brake Pad material forms the pin. It has been found that both wear rate and friction coefficient vary with both applied normal load and sliding speed. With increase in the applied normal load, the wear rate was observed to increase whereas the friction coefficient decreases. However, both the wear rate and friction coefficients were observed to vary proportionally with the sliding speed. During the wear tests, formation of a tribo-layer was observed, presence of which can affect the wear behavior, apart from acting as a source of wear debris. Tribo-layer formed over the worn disc surfaces was found to be heterogeneous in nature. Morphology and topography of worn surfaces and debris were studied using scanning electron microscope (SEM). Chemical composition of different wear products was obtained using electron probe micro analyzer (EPMA) and X-ray diffraction (XRD) techniques. Possible wear mechanisms operative in Al-MMC-Brake Pad tribo-couple have been discussed.
-
effect of reinforcement volume fraction and size distribution on the tribological behavior of al composite Brake Pad tribo couple
Wear, 2006Co-Authors: R K Uyyuru, M K Surappa, S BrusethaugAbstract:Tribological behavior of aluminium matrix composite (AMC)/Brake Pad tribo-couple under dry sliding conditions was studied using Pin-on-Disc machine. Brake Pad material was used as pins while the AMC formed the rotating disc. Series of experiments were performed to characterize the tribological nature of the tribo-couple. Load and sliding speeds were varied over a range to represent actual braking conditions in passenger cars. Effect of volume fraction and size distribution of reinforcement on wear and friction coefficient has been studied. It was observed that a heterogeneous tribo-layer was formed over the worn surfaces during the wear tests. Presence of tribo-layer was believed to cause two effects: acting as a lubricant layer and acting as a source of wear debris. Morphology and topography of worn surfaces and debris were studied using scanning electron microscope (SEM), electron probe micro analyzer (EPMA), and X-ray diffraction (XRD) techniques. When the reinforcement in the matrix has wide size distribution, wear rate and friction coefficients are found to be higher compared to composite containing mono-size reinforcement.
M K Surappa - One of the best experts on this subject based on the ideXlab platform.
-
tribological behavior of al si sicp composites automobile Brake Pad system under dry sliding conditions
Tribology International, 2007Co-Authors: R K Uyyuru, M K Surappa, S BrusethaugAbstract:Tribological behavior of stir-cast $Al-Si/SiC_p$ composites against automobile Brake Pad material was studied using Pin-on-Disc tribo-tester. The Al-metal matrix composite (Al-MMC) material was used as disc, whereas the Brake Pad material forms the pin. It has been found that both wear rate and friction coefficient vary with both applied normal load and sliding speed. With increase in the applied normal load, the wear rate was observed to increase whereas the friction coefficient decreases. However, both the wear rate and friction coefficients were observed to vary proportionally with the sliding speed. During the wear tests, formation of a tribo-layer was observed, presence of which can affect the wear behavior, apart from acting as a source of wear debris. Tribo-layer formed over the worn disc surfaces was found to be heterogeneous in nature. Morphology and topography of worn surfaces and debris were studied using scanning electron microscope (SEM). Chemical composition of different wear products was obtained using electron probe micro analyzer (EPMA) and X-ray diffraction (XRD) techniques. Possible wear mechanisms operative in Al-MMC-Brake Pad tribo-couple have been discussed.
-
tribological behavior of al si sicp composites automobile Brake Pad system under dry sliding conditions
Tribology International, 2007Co-Authors: R K Uyyuru, M K Surappa, S BrusethaugAbstract:Tribological behavior of stir-cast $Al-Si/SiC_p$ composites against automobile Brake Pad material was studied using Pin-on-Disc tribo-tester. The Al-metal matrix composite (Al-MMC) material was used as disc, whereas the Brake Pad material forms the pin. It has been found that both wear rate and friction coefficient vary with both applied normal load and sliding speed. With increase in the applied normal load, the wear rate was observed to increase whereas the friction coefficient decreases. However, both the wear rate and friction coefficients were observed to vary proportionally with the sliding speed. During the wear tests, formation of a tribo-layer was observed, presence of which can affect the wear behavior, apart from acting as a source of wear debris. Tribo-layer formed over the worn disc surfaces was found to be heterogeneous in nature. Morphology and topography of worn surfaces and debris were studied using scanning electron microscope (SEM). Chemical composition of different wear products was obtained using electron probe micro analyzer (EPMA) and X-ray diffraction (XRD) techniques. Possible wear mechanisms operative in Al-MMC-Brake Pad tribo-couple have been discussed.
-
effect of reinforcement volume fraction and size distribution on the tribological behavior of al composite Brake Pad tribo couple
Wear, 2006Co-Authors: R K Uyyuru, M K Surappa, S BrusethaugAbstract:Tribological behavior of aluminium matrix composite (AMC)/Brake Pad tribo-couple under dry sliding conditions was studied using Pin-on-Disc machine. Brake Pad material was used as pins while the AMC formed the rotating disc. Series of experiments were performed to characterize the tribological nature of the tribo-couple. Load and sliding speeds were varied over a range to represent actual braking conditions in passenger cars. Effect of volume fraction and size distribution of reinforcement on wear and friction coefficient has been studied. It was observed that a heterogeneous tribo-layer was formed over the worn surfaces during the wear tests. Presence of tribo-layer was believed to cause two effects: acting as a lubricant layer and acting as a source of wear debris. Morphology and topography of worn surfaces and debris were studied using scanning electron microscope (SEM), electron probe micro analyzer (EPMA), and X-ray diffraction (XRD) techniques. When the reinforcement in the matrix has wide size distribution, wear rate and friction coefficients are found to be higher compared to composite containing mono-size reinforcement.
-
Characteristics of Tribolayers Observed in A356 Al Alloy — SiCP Composite Discs/Brake Pad During Sliding Wear Tests
World Tribology Congress III Volume 1, 2005Co-Authors: R. C. Shivamurthy, M K SurappaAbstract:Tribological characteristics of A356 Al alloy-10 vol. % SiCP composite discs/Brake Pad has been studied under dry sliding conditions at sliding speeds in the range 2 to 5 m/s and at loads in the range 1–3 MPa. In these tests, disc of Al MMCs and pin of friction Pad made of polymer based composite were used. Wear rates of Al MMC disc as calculated by weight loss method, found to be negative at high sliding speed and high load. Worn surface of disc has been analyzed using EDAX. SEM analyses of worn surfaces of composite disc infer transfer of material from pin to the disc resulting in the formation of tribolayers. Two types of tribolayers were observed on the worn surface, one having shiny appearance of copper rich layer and other is dark in colour consisting of Mg, S, Fe, Ba, Ca, Si, Cu, In and Al. In the later layers were rich in copper and appear as bright patchy layers under SEM. Coverage of copper rich layers increase all along and across the worn track at a sliding speed of 4 and 5 m/s in the load range 2 to 3 MPa. Atomic percent of copper increase with load and consequently affect the wear rate of disc. EDAX analysis of dark tribo layers on wear track of composite disc show continuous increase in the amount of Cu and Ba with increase in speed and load. Hence, wear rate of composite discs were relatively low under all test conditions. These results clearly indicate composition of friction material having profound influence on the wear rate of Al MMC discs.© 2005 ASME
Ranchan Chauhan - One of the best experts on this subject based on the ideXlab platform.
-
optimization of tribological properties of cement kiln dust filled Brake Pad using grey relation analysis
Materials & Design, 2016Co-Authors: Tej Singh, Amar Patnaik, Ranchan ChauhanAbstract:Abstract Cement kiln dust (CKD) filled with different resin (straight phenolic, cashew nut shell liquid (CNSL) modified, Linseed oil modified, Alkyl-benzene modified) based Brake Pad formulations were fabricated and characterized their physical, mechanical and tribological properties. Tribo-performance of the fabricated Brake Pad formulations were evaluated on a Krauss type friction tester as per the ECE R-90 (Economic Commission for Europe Regulation-90) norms. The experimental results indicated that CKD and straight phenolic resin combination were proved best in terms of coefficient of friction, friction stability, and friction fluctuations, but inferior in wear performance and counterface friendliness. The combinations of CKD and CNSL/Linseed oil modified resin were most beneficial for enhancing both recovery and wear performance as well as reducing variability in friction. The formulation with CKD and Alkyl-benzene modified resin was observed the best fade performance and counterface friendliness. The results obtained were considered as criteria and grey relation analysis (GRA) approach was used to determine the complete ranking of the Brake Pad formulation. The results also concluded that the formulation of CKD with straight phenolic resin exhibits the optimal properties.
-
optimization of tribological properties of cement kiln dust filled Brake Pad using grey relation analysis
Materials & Design, 2016Co-Authors: Tej Singh, Amar Patnaik, Ranchan ChauhanAbstract:Abstract Cement kiln dust (CKD) filled with different resin (straight phenolic, cashew nut shell liquid (CNSL) modified, Linseed oil modified, Alkyl-benzene modified) based Brake Pad formulations were fabricated and characterized their physical, mechanical and tribological properties. Tribo-performance of the fabricated Brake Pad formulations were evaluated on a Krauss type friction tester as per the ECE R-90 (Economic Commission for Europe Regulation-90) norms. The experimental results indicated that CKD and straight phenolic resin combination were proved best in terms of coefficient of friction, friction stability, and friction fluctuations, but inferior in wear performance and counterface friendliness. The combinations of CKD and CNSL/Linseed oil modified resin were most beneficial for enhancing both recovery and wear performance as well as reducing variability in friction. The formulation with CKD and Alkyl-benzene modified resin was observed the best fade performance and counterface friendliness. The results obtained were considered as criteria and grey relation analysis (GRA) approach was used to determine the complete ranking of the Brake Pad formulation. The results also concluded that the formulation of CKD with straight phenolic resin exhibits the optimal properties.
Uygur İlyas - One of the best experts on this subject based on the ideXlab platform.
-
Wear response of non-asbestos Brake Pad composites reinforced with walnut shell dust
'Springer Science and Business Media LLC', 2020Co-Authors: Akıncıoğlu Gülşah, Akıncıoğlu Sıtkı, Öktem Hasan, Uygur İlyasAbstract:WOS: 000510276300001With automobile numbers continuing to increase, competition among manufacturers of Brake Pads is also increasing along with the search for additives to serve as alternatives to the materials presently being used. In addition to the cost of the additives used, another important consideration in choosing materials is that they should be safe for the environment and human health. This study investigated the effect on braking performance of Brake Pads produced using walnut shell powder as a natural additive material. Two different types of Brake Pad samples were produced using 3.5 (2A) and 7% (2B) walnut shell dust in the contents. A commercial Clio Brake tip was used as the reference (CO). The produced Brake Pads were subjected to thermal conductivity, friction wear, density, hardness and water and oil absorption tests and microstructure analysis. A Chase type device was used for wear friction tests, and the results were obtained according to SAE-J661(Brake Lining Quality Test Procedure) standards. The experimental data were compared with those of the commercial Brake Pads, and the performances of the natural additive Brake Pads were evaluated. The addition of walnut shell was shown to be compatible within the composition and exhibited a positive effect on the friction coefficient.Scientific Research Project Unit of Duzce UniversityDuzce University [DUBAP-2015/72]This study was supported by the Scientific Research Project Unit of Duzce University (DUBAP-2015/72). The authors also thank Balatacilar Cooperation Inc. for their contributions
-
Advanced Friction-Wear Behavior of Organic Brake Pads Using a Newly Developed System
'Informa UK Limited', 2019Co-Authors: Öktem Hasan, Uygur İlyasAbstract:WOS: 000462325200006The objective of this study was to investigate the influence of an advanced performance system on the tribological behavior of Brake Pad material using a specially designed Brake Pad tester system following standard SAE J-661. The tribological behavior and friction and wear characteristics of the organic Brake Pad samples were evaluated. During braking tests, the samples, in contact with a cast iron disk, were studied at different disc speeds, temperatures, and braking cycles under a constant pressure. In order to understand the friction and wear behavior, the unworn surfaces, worn surfaces, and wear debris were characterized by means of scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX). Furthermore, the surface characteristics and differences in the wear modes of the Brake Pad samples were examined. Wear debris was permitted to deform the Brake Pad surfaces, leading to friction layers and enabling the estimation of the friction behavior of the Brake Pads. The results showed that the best friction-wear behavior was obtained with lower braking cycles at low speeds and temperature. Thus, the newly developed Brake Pad tester system proved very effective in evaluating the performance of the Brake Pad samples. [GRAPHICS] .Scientific Research Project Unit of Kocaeli UniversityKocaeli University [KOU-BAP-2013/68]This study was supported by the Scientific Research Project Unit of Kocaeli University (KOU-BAP-2013/68)