The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
S Basavarajappa - One of the best experts on this subject based on the ideXlab platform.
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dry Sliding Wear behavior of heat treated hybrid metal matrix composite using taguchi techniques
Materials & Design, 2014Co-Authors: T S Kiran, S Basavarajappa, Prasanna M Kumar, B M ViswanathaAbstract:Abstract Dry Sliding Wear behavior of zinc based alloy and composite reinforced with SiCp (9 wt%) and Gr (3 wt%) fabricated by stir casting method was investigated. Heat treatment (HT) and aging of the specimen were carried out, followed by water quenching. Wear behavior was evaluated using pin on disc apparatus. Taguchi technique was used to estimate the parameters affecting the Wear significantly. The effect of HT was that it reduced the microcracks, residual stresses and improved the distribution of microconstituents. The influence of various parameters like applied load, Sliding speed and Sliding distance on Wear behavior was investigated by means and analysis of variance (ANOVA). Further, correlation between the parameters was determined by multiple linear regression equation for each response. It was observed that the applied load significantly influenced the Wear volume loss (WVL), followed by Sliding speed implying that increase in either applied load or Sliding speed increases the WVL. Whereas for composites, Sliding distance showed a negative influence on Wear indicating that increase in Sliding distance reduces WVL due to the presence of reinforcements. The Wear mechanism of the worn out specimen was analyzed using scanning electron microscopy. The analysis shows that the formation and retention of ceramic mixed mechanical layer (CMML) plays a major role in the dry Sliding Wear resistance.
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influence of Sliding speed on the dry Sliding Wear behaviour and the subsurface deformation on hybrid metal matrix composite
Wear, 2007Co-Authors: S Basavarajappa, G. Chandramohan, Arjun Mahadevan, Mukundan Thangavelu, R Subramanian, P GopalakrishnanAbstract:In recent years, more attention is being paid to the structure of both the surface and the subsurface of a material being subjected to Wear. Surface and subsurface deformation can cause a considerable change in the microstructure of the material leading to a change in its properties. The present study investigates the influence of Sliding speed on dry Sliding Wear behaviour and the extent of subsurface deformation in aluminium metal matrix composites, namely Al 2219/15SiCp and Al 2219/15SiCp-3graphite all fabricated by the liquid metallurgy route. Dry Sliding Wear tests were conducted using a pin-on-disc machine. The subsurface deformation was assessed as a measure of variation in microhardness along the depth normal to the cross-section of the worn surface. The results reveal that with increasing Sliding speeds in the mild Wear region the degree of subsurface deformation was also increasing. The graphitic composite exhibited less degree of subsurface deformation in comparison to the graphite free composite.
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Application of Taguchi techniques to study dry Sliding Wear behaviour of metal matrix composites
Materials & Design, 2007Co-Authors: S Basavarajappa, G. Chandramohan, J. Paulo DavimAbstract:Abstract Aluminium metal matrix composites reinforced with SiC and graphite (Gr) particles was prepared by liquid metallurgy route. Dry Sliding Wear behaviour of the composite was tested and compared with Al/SiCp composite. A plan of experiments based on Taguchi technique was used to acquire the data in a controlled way. An orthogonal array and analysis of variance was employed to investigate the influence of Wear parameters like as normal load, Sliding speed and Sliding distance on dry Sliding Wear of the composites. The objective was to investigate which design parameter significantly affects the dry Sliding Wear. It shows that graphite particles are effective agents in increasing dry Sliding Wear resistance of Al/SiCp composite.
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dry Sliding Wear behavior of al 2219 sicp gr hybrid metal matrix composites
Journal of Materials Engineering and Performance, 2006Co-Authors: S Basavarajappa, G. Chandramohan, K Mukund, M Ashwin, M PrabuAbstract:The dry Sliding Wear behavior of Al 2219 alloy and Al 2219/SiCp/Gr hybrid composites are investigated under similar conditions. The composites are fabricated using the liquid metallurgy technique. The dry Sliding Wear test is carried out for Sliding speeds up to 6 m/s and for normal loads up to 60 N using a pin on disc apparatus. It is found that the addition of SiCp and graphite reinforcements increases the Wear resistance of the composites. The Wear rate decreases with the increase in SiCp reinforcement content. As speed increases, the Wear rate decreases initially and then increases. The Wear rate increases with the increase in load. Scanning electron microscopy micrographs of the worn surface are used to predict the nature of the Wear mechanism. Abrasion is the principle Wear mechanism for the composites at low Sliding speeds and loads. At higher loads, the Wear mechanism changes to delamination.
R Narayanasamy - One of the best experts on this subject based on the ideXlab platform.
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dry Sliding Wear behaviour of zinc oxide reinforced magnesium matrix nano composites
Materials & Design, 2014Co-Authors: B Selvam, P Marimuthu, R Narayanasamy, V Anandakrishnan, Khin Sandar Tun, Manoj Gupta, M KamarajAbstract:Abstract The main objective of the present work is to investigate the dry Sliding Wear behaviour of a magnesium matrix composite reinforced with zinc oxide nano-particles. Magnesium matrix composites have many applications, especially in the automotive and aerospace industries, due to their superior specific properties. A magnesium matrix composite with 0.5 vol.% ZnO nano-reinforcement was prepared using powder metallurgy and was hot extruded to eliminate pores. The Wear behaviour of the Mg/ZnO nano-composite was investigated by conducting dry Sliding tests as a function of Wear with an oil-hardened non-shrinking (OHNS) steel disc as the counterpart on a pin-on-disc apparatus. Wear tests were conducted for normal loads of 5, 7.5 and 10 N at Sliding velocities of 0.6, 0.9 and 1.2 m/s at room temperature. The variations of the friction coefficient and Wear rate with the Sliding distances (500 m, 1000 m and 1600 m) for different normal loads and Sliding velocities were plotted and analysed. To study the dominant Sliding Wear mechanism for various test conditions, the worn surfaces were analysed using scanning electron microscopy. The Wear rate was found to increase with the load and Sliding velocity.
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dry Sliding Wear behaviour of aa 6351 zrb2 in situ composite at room temperature
Materials & Design, 2010Co-Authors: Naveen G Kumar, R Narayanasamy, S Natarajan, S Kumaresh P Babu, K Sivaprasad, S SivasankaranAbstract:Abstract In the present work, AA 6351-xZrB2 [x = 0, 3, 6 and 9 weight percentage (wt.%)] in situ composites have been prepared by the reaction of mixture of K2ZrF6 and KBF4 with molten aluminium alloy at a reaction temperature of 850 °C. The in situ prepared composites were characterized by using scanning electron microscope (SEM), X-ray diffractometer (XRD), and microhardness analysis. The Sliding Wear properties of the prepared composite at room temperature were estimated by a pin-on-disc Wear testing equipment using the composite material; the pins were machined according to standard sizes, and the tests were conducted as per the standards recommended by the ASTM G99-95a designation of different weighing percentage at room temperature. The Wear characteristics of the composite in the as-cast, the solutionized and the solutionized-aged conditions were studied by conducting Sliding Wear test at the load of 9.81 N. The results indicated that the Wear rate was decreased with an increase in the weight percentage of ZrB2 and the Wear resistance was increased with an increase in the fraction of ZrB2 particulates in composite before and after heat treatment.
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Sliding Wear behaviour of al 6063 tib2 in situ composites at elevated temperatures
Materials & Design, 2009Co-Authors: S Natarajan, R Narayanasamy, S Kumaresh P Babu, G Dinesh, Anil B Kumar, K SivaprasadAbstract:Abstract A low cost system of Al 6063 − x TiB 2 ( x = 0, 5, 10 wt.%) in situ metal matrix composites (MMCs) were prepared by the reaction mixture of K 2 TiF 6 and KBF 4 with molten alloy. These in situ prepared composites were characterized by using scanning electron microscope, X-ray diffractometer, and microhardness analysis. The dry Sliding Wear behaviour of the prepared composite was investigated by using a Pin on Disc method at different applied loads of 9.8, 19.6 and 29.4 N for various temperatures (100, 200 and 300 °C). The study at room temperature was also carried out for comparison purpose. The results indicate that the Wear rate decreases with the increase in the weight percentage of TiB 2 , while it increases with the increase in the applied load.
Baoluo Shen - One of the best experts on this subject based on the ideXlab platform.
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effect of dc plasma nitriding temperature on microstructure and dry Sliding Wear properties of 316l stainless steel
Surface & Coatings Technology, 2008Co-Authors: Guijiang Li, Qian Peng, Cong Li, Ying Wang, Shuyuan Chen, Jun Wang, Baoluo ShenAbstract:A Wear resistant nitrided layer was formed on 316L austenitic stainless steel substrate by DC plasma nitriding (DCPN). The structural phases, micro-hardness and dry-Sliding Wear behavior of the nitrided layer were investigated by optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDS), micro-hardness tester and ring-on-block Wear tester. The results show that a single expanded austenite layer (S-phase) and a single CrN nitride layer were formed at 400 °C and 480 °C, respectively. In addition, the S-phase layers formed on the samples exhibited the best dry-Sliding Wear resistance under ring-on-block contact configuration test. Wear of the untreated 316L was sever and characterized by strong adhesion, abrasion and oxidation mechanism, whilst Wear of the DCPN-treated 316L was mild and dominated by plastic deformation, slight abrasion and frictional polishing.
G. Chandramohan - One of the best experts on this subject based on the ideXlab platform.
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influence of Sliding speed on the dry Sliding Wear behaviour and the subsurface deformation on hybrid metal matrix composite
Wear, 2007Co-Authors: S Basavarajappa, G. Chandramohan, Arjun Mahadevan, Mukundan Thangavelu, R Subramanian, P GopalakrishnanAbstract:In recent years, more attention is being paid to the structure of both the surface and the subsurface of a material being subjected to Wear. Surface and subsurface deformation can cause a considerable change in the microstructure of the material leading to a change in its properties. The present study investigates the influence of Sliding speed on dry Sliding Wear behaviour and the extent of subsurface deformation in aluminium metal matrix composites, namely Al 2219/15SiCp and Al 2219/15SiCp-3graphite all fabricated by the liquid metallurgy route. Dry Sliding Wear tests were conducted using a pin-on-disc machine. The subsurface deformation was assessed as a measure of variation in microhardness along the depth normal to the cross-section of the worn surface. The results reveal that with increasing Sliding speeds in the mild Wear region the degree of subsurface deformation was also increasing. The graphitic composite exhibited less degree of subsurface deformation in comparison to the graphite free composite.
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Application of Taguchi techniques to study dry Sliding Wear behaviour of metal matrix composites
Materials & Design, 2007Co-Authors: S Basavarajappa, G. Chandramohan, J. Paulo DavimAbstract:Abstract Aluminium metal matrix composites reinforced with SiC and graphite (Gr) particles was prepared by liquid metallurgy route. Dry Sliding Wear behaviour of the composite was tested and compared with Al/SiCp composite. A plan of experiments based on Taguchi technique was used to acquire the data in a controlled way. An orthogonal array and analysis of variance was employed to investigate the influence of Wear parameters like as normal load, Sliding speed and Sliding distance on dry Sliding Wear of the composites. The objective was to investigate which design parameter significantly affects the dry Sliding Wear. It shows that graphite particles are effective agents in increasing dry Sliding Wear resistance of Al/SiCp composite.
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dry Sliding Wear behavior of al 2219 sicp gr hybrid metal matrix composites
Journal of Materials Engineering and Performance, 2006Co-Authors: S Basavarajappa, G. Chandramohan, K Mukund, M Ashwin, M PrabuAbstract:The dry Sliding Wear behavior of Al 2219 alloy and Al 2219/SiCp/Gr hybrid composites are investigated under similar conditions. The composites are fabricated using the liquid metallurgy technique. The dry Sliding Wear test is carried out for Sliding speeds up to 6 m/s and for normal loads up to 60 N using a pin on disc apparatus. It is found that the addition of SiCp and graphite reinforcements increases the Wear resistance of the composites. The Wear rate decreases with the increase in SiCp reinforcement content. As speed increases, the Wear rate decreases initially and then increases. The Wear rate increases with the increase in load. Scanning electron microscopy micrographs of the worn surface are used to predict the nature of the Wear mechanism. Abrasion is the principle Wear mechanism for the composites at low Sliding speeds and loads. At higher loads, the Wear mechanism changes to delamination.
Shijia Yang - One of the best experts on this subject based on the ideXlab platform.
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microstructure and dry Sliding Wear properties of tic reinforced composite coating prepared by plasma transferred arc weld surfacing process
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2007Co-Authors: J S Mu, Xiangyang Xu, Shijia YangAbstract:Abstract A Wear resistant TiC titanium carbide-reinforced composite coating was fabricated on 1Cr18Ni9Ti austenitic stainless steel substrate by plasma-transferred arc (PTA) weld-surfacing process using Fe–Ti–C powder blends. The microstructure, microhardness and dry-Sliding Wear behavior of the composite coating were investigated using optical microscopy (OM), X-ray diffraction (XRD), scanning electron micrograph (SEM), energy-dispersive X-ray analysis (EDS), microhardness tester and ring-on-ring Wear tester. The formation mechanism of the composite coating has been discussed. Results show that the composite coating consists of primary TiC carbide as the reinforcing phase and TiC/γ-Fe eutectics as the matrix. The composite coating is metallurgically bonded to the 1Cr18Ni9Ti austenitic stainless steel substrate. The TiC/γ-Fe composite coating has high hardness and excellent Wear resistance under dry-Sliding Wear test condition.