S. Sendhil Kumar

Bio: S. Sendhil Kumar is an academic researcher from Info Institute of Engineering. The author has contributed to research in topics: Ultimate tensile strength & Suspension (vehicle). The author has an hindex of 2, co-authored 3 publications receiving 9 citations.

Investigation of mechanical behavior of friction stir welded joints of AA6063 with AA5083 aluminum alloys

Abstract: Aluminum alloy finds its applications in various sectors of engineering. This paper discusses the investigation ofmechanical characteristics of buttweld joints of aluminum alloy AA6063 along with AA5083. An experiment was conducted for different tool rotational speeds of 600 rpm, 800 rpm and 1000 rpm. Specifications of friction stir welding machine were 4 kN axial load and welding speed of 40 mm/min. Friction stir welded (FSW) joints of higher tensile strength, lower flexural strength and lower impact strength with maximum hardness, for the work piece fabricated at 1000 rpm using a high speed steel tool with a cylindrical profile was observed. Better understanding of the effect of tool rotational speed and mechanical properties was illustrated through the experimental result.

Investigation of mechanical and wear behaviour of graphene reinforced aluminium alloy 6061 metal matrix composite

Abstract: Owing to its outstanding mechanical and thermal properties, graphene has shown enormous potentials as an improvement material for composites. This paper investigates the properties of graphene-reinforced 6061 aluminium alloy Metal Matrix Composites (MMCs) with varying weight percentages (5 and 10 wt.% graphene) of reinforcement. Energy Dispersive Spectroscopy (EDS) and Scanning Electron Microscope (SEM) studies of the MMC confirm the presence and distribution of graphene particles in the Al6061 matrix materials. Mechanical properties such as tensile strength, hardness, and impact strength of MMCs were studied and assessed. Tensile and impact strength of the MMC’s increased from 25 to 60 % by the addition of 10 wt.% graphene in aluminium 6061 alloys. The percentage of elongation diminished with the addition of reinforcement in the matrix. The most significant improvement in hardness can be found in additional graphene particles. Wear-test had been performed using the pin-on-disc machine at 10 N load. It was observed that the tribological behaviour of the composite improved after the addition of graphene in Al6061. K e y w o r d s: aluminium alloy 6061, graphene, tensile strength, impact strength, voids, debris

Investigation of Forced Frequency in a Commercial Vehicle Suspension System

Abstract: Vehicle suspension plays a vital role in maintaining the center of gravity to achieve perfect balancing of the vehicle to provide the comfortable ride. While designing the suspension system of automobile, vibration is the main aspect to be considered. This paper aims to analyze the automobile front and rear suspension for a four wheeler using analytical and numerical approach. Existing details of the suspension is collected using the concept of reverse engineering. Natural and forced frequency of the front and rear suspension system is calculated theoretically based on the collected data’s. The natural frequency and forced frequency is numerically computed for front and rear suspension. The amplitude of vibration is reduced by replacing the spring material and its forced frequency is reduced by 1.18 % and 1.56 % for front and rear suspension system respectively. This result reveals that low carbon steel has ability to reduce the forcing frequency and can produce comfort ride.

Studies on microstructural characteristics and mechanical properties of hybrid Al-4032 AMC reinforced with SiC and granite marble powder

Abstract: The present work reports the impact of granite marble powder (GMP) and SiC on the physical, microstructural, and mechanical characterization of the hybrid aluminium-based metal matrix composite (AMC). Al-4032/SiC/GMP composites with 4, 6, and 8 weight % of SiC and GMP (equal proportion) have been fabricated through stir casting. The impact on properties like density, porosity, ultimate tensile strength (UTS), elongation, microhardness, and impact strength were analyzed according to ASTM standards. A maximum of 1.07% increase in theoretical density and a maximum of 4.86% decrease in experimental density have been recorded for 8% reinforcement. Microstructure of the as-cast specimens were analyzed using optical microscope (OM), XRD (X-ray diffraction), and SEM (scanning electron microscope) equipped with EDS (energy dispersive spectroscopy). Owing to ceramic particles, mechanical properties like UTS, microhardness, and impact strength of the AMC got enhanced from 69.4 MPa to 146 MPa, 131.4 HV to 190.2 HV, and 22.4 J to 32.8 J, respectively.

A Study on Corrosion Resistance and Mechanical Performance of 6061 Aluminium Alloy: Galvanized Mild Steel Electron Beam Welds at Varying Welding Parameters

Abstract: Dissimilar welds of steel and aluminium alloys have an inherent problem of the vast difference in solid solubility which questions their integrity. The present study elaborates on the mechanical failure and corrosion degradation of 6061 Al—galvanized mild steel lap joints fabricated by electron beam welding as a function of varying parameters such as processing speed, voltage and current. The interfaces of two weld specimens were examined using scanning electron microscopy, phase analysis by micro-area X-ray diffraction and hardness testing by Vickers micro-hardness tester. Results showed the generation of the intermetallic layer at the weld seam–mild steel interface in the specimens. The composition of the Al–Fe intermetallics in the layer was confirmed by micro-XRD analysis. The layer width increased with increased heat input and average width varied between 11 and 16 µm in the specimens. The micro-hardness of the layer was found to increase with a decrease in processing speed during welding. The corrosion resistance and mechanical strength of welds were evaluated as per ASTM G 67-04 and D 1002, respectively. The microstructures at weld interfaces have shown intergranular corrosion after nitric acid exposure for 24 h according to ASTM G 67-04. Weight loss analysis was done after the corrosion test. It was identified that welds fabricated at higher voltage exhibited greater weight loss of 55.9 mg and specimen joined at lower voltage was found to exhibit a weight loss of 41.1 mg, respectively. High intermetallic layer thickness in the welds resulted in failure at the weld seam region during lap shear testing.

Analysis of Spectroscopic, Morphological Characterization and Interaction of Dye Molecules for the Surface Modification of TiB2 Nanoparticles

Abstract: Nanoparticles of titanium diboride (TiB2) coated with a conductive polymer and subjected to an oxidizing agent was carried out in this research. TiB2 nanoparticles coated with polypyrrole (PPy) were studied using XRD and TEM techniques. Nitrogen adsorption and desorption properties of nanoparticles are covered with modified polypyrrole to understand better the surface zone, structural features, and pore geometries of the nanoparticles. The water-based hazardous anionic Congo red (CR) dye was removed using polypyrrole-coated titanium diboride (PPy@TiB2) nanoparticles. Numerous cutting-edge experimental techniques, including FTIR, FE-SEM, EDXS, and element mapping analysis, were used to confirm the CR color’s adhesion to the PPy@TiB2 nanoadsorbent study. While conducting batch experiments, coated TiB2 nanoadsorbents with polypyrrole enhanced the adsorption behaviour. One of the factors evaluated in the adsorption tests was pH; another was contact time, and a third was dose. At pH = 4 , 98.75% of Congo red dye was detached using 60 mg of PPy-coated TiB2 nanoadsorbent. Several sorption-desorption cycles were performed on this nanoadsorbent to determine its reusability. An excellent adsorption capacity for water treatment is reported in PPy-coated TiB2 nanoadsorbent.