ELAIYARASAN U
@srmeaswari.ac.in
ASSISTANT PROFESSOR
EASWARI ENGINEERING COLLEGE
RESEARCH, TEACHING, or OTHER INTERESTS
Mechanical Engineering, Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
B. Vinod, F. Anand Raju, U. Elaiyarasan, and S. Suresh
Springer Science and Business Media LLC
Bakkiyaraj Murugesan, U Elaiyarasan, Jambulingam Ananth, and Parasumanna Krishnamurthy Nagarajan
SAGE Publications
In this experimental investigation, rotary friction welding (RFW) was employed to fabricate dissimilar Al-Cu joints, and the RFW variables were rotated against the ultimate tensile strength (UTS) in an effort to strengthen the dissimilar AA1100 and pure copper (Al-Cu) joint using response surface methodology (RSM) with a three-factorial design. Following this, micro-hardness, metallurgical characterization, and fatigue properties studies were done on the dissimilar joints fabricated under the optimized conditions. As a result of this investigation, the UTS of 208 MPa was attained as a maximum as the rotation speed was set at 1800 rpm, the friction time was 10 s, and the forging load was 5 kN. The dissimilar joint exhibits a better fatigue strength of 98.5 MPa when compared to the AA1100 base metal. At optimized conditions, the feature of the fracture image was found to be brittle due to the development of new compounds in the weld interface. A significant dip in micro hardness (52 Hv) was noticed in the region that connects TMAZ and HAZ of the AA1100 side of the dissimilar joint, which was concluded to be the weakest zone as the dissimilar joints were fractured in the same location during the tensile test. The observed results benefit the automotive sector, especially when fabricating components that require effective thermal management and weight reduction, like electrical connectors, heat dissipation systems, and radiators. For heat exchanger applications, improved fatigue strength in dissimilar Al-Cu joints is important because it guarantees longer structural integrity and improved durability.
K. Nallathambi, C. Senthilkumar, U. Elaiyarasan, and M. Seeman
Elsevier BV
S. Srikanth, C. Senthilkumar, and U. Elaiyarasan
Elsevier BV
S. Srikanth, C. Senthilkumar, and U. Elaiyarasan
Springer Science and Business Media LLC
U. Elaiyarasan, B. Vinod, and K. Nallathambi
Springer Science and Business Media LLC
K. Nallathambi, C. Senthilkumar, and U. Elaiyarasan
Springer Science and Business Media LLC
Gurunathan Saravanan, G. B. Bhaskar, Uthirapathi Elaiyarasan, and Raman Mookkan Alagu
EDP Sciences
Nowadays, usages of laminated composites have been extended to various applications such as automotive, aircraft and aerospace due to its high strength-weight ratio. Generally, aluminium alloys are developed using various casting techniques to achieve the required properties. However, laminated aluminium composites have received great attention among the scientist due to the weight reduction, the damping capacity they offer etc. In this present investigation, carbon and glass fibre laminated aluminium (Al2024-T3) composites are prepared by hand lay-up technique. Different form of aluminium structure namely sheet and mesh are used to fabricate − the composites. Different composites are prepared namely carbon fibre aluminium sheet laminate (CFASL), carbon fibre aluminium mesh laminate (CFAML), glass fibre aluminium sheet laminate (GFASL) and carbon fibre aluminium mesh laminate (GFAML). Effects of reinforcement of fibre on tensile, bending and flexural strength are studied. The microstructure of the composites is captured using scanning electron microscope (SEM) to study the failure mechanism. It was revealed that the CFASL and CFAML offered superior mechanical properties compared to the GFASL and GFAML. Higher tensile, bending and flexural strengths were obtained with carbon fibre and aluminium sheet laminated composites. They withstand the higher stresses due to less debonding and matrix cracking. Debonding and fibre breaking mechanisms observed in the glass fibre laminated composites caused reduced strength. CFASL composites showed superior mechanical properties followed by CFAML, GFASL and GFAML.
B. Vinod, S. Suresh, S. Sunil Kumar Reddy, D. Sudhakara, and U. Uthirapathi Elaiyarasan
Springer Science and Business Media LLC
C Rajaravi, U Elaiyarasan, B Gobalakrishnan, and R Ganapathy Srinivasan
IOP Publishing
Abstract Aluminium and its alloys are widely used for fabricating components are used in aircraft, automobile, defence and structural applications. Due to its light weight and high strength, it is applied in the various commercial purposes such as window, doors, construction member etc. However, machining of aluminium alloys using conventional machining methods is difficult. In this present investigation, an endeavour has been made to drill TiB2 in situ aluminium metal matrix composite alloy developed using stir casting method. During the casting two different salts namely K2TiF6 and KBF4 are added with matrix materials to form TiB2. The paper is studied the surface roughness (SR) of drilled TiB2 in situ aluminium metal matrix composite viz speed, feed rate and TiB2 addition. Empirical relationship is developed for SR in order to identify the dominating factors. The percentage contribution of SR is 96.35% that showed the empirical model is adequate. The normal probability plot showed the points of residuals are equally distributed over the straight line. The lack of fit value was 3.65 which is less than the standard point. Therefore, the SR model is satisfactory. SR increased with increasing of speed, feed rate and addition of TiB2. The removal of TiB2 particles causes small pits and voids due to the inclusion of reinforcement. The minimum SR was achieved at lowest speed (1260 rpm), feed rate (0.05 mm rev−1) and TiB2 addition (2%). As speed and feed increased, the surface hardness increased.
U Elaiyarasan, V Satheeshkumar, C Senthilkumar, and C Nandakumar
IOP Publishing
Abstract The present paper is studied the mathematical and artificial neural network (ANN) model in electrical discharge deposition of magnesium alloy. Surface coating is covering the workpiece surface with desired coating materials to improve the surface properties. Electrical discharge coating (EDC) is an electro thermal process, used for creating hard coating over the workpiece. In this present study, magnesium alloy is deposited using WC-Cu composite electrode by EDC. RSM is used to develop design matrix for carrying out EDC experiments. Compaction load, discharge current and pulse on time are controlled, whereas material deposition rate (MDR) and surface roughness (SR) are measured as response. The objective of this investigation is to predict the MDR and SR using neural network technique. ANN model developed by back propagation algorithm is proposed in this study for predicting the responses. ANOVA is conducted to identify the dominating parameter, which significantly affects the responses. Correlation coefficient between the ANN and RSM is 0.99, which is close to the unity for ANN. It was revealed that the prediction of proposed ANN was found to be excellent to the RSM model. MDR increased with increasing discharge current and pulse on time. SR decreased with increasing compaction load.
N. ANANTHI, U. ELAIYARASAN, V. SATHEESHKUMAR, C. SENTHILKUMAR, and S. SATHIYAMURTHY
World Scientific Pub Co Pte Ltd
Nowadays, coated surfaces have been used in the diverse of applications, such as automobile, aerospace and biomedicals. Different surface modification techniques have been used to improve the surface properties. Electrical discharge deposition (EDD) is an electro-thermal process widely used to deposit the hard composite coating on the workpiece with powder metallurgy electrode. To increase the deposition rate, powder composite electrode plays important role in this EDD process. In this work, tungsten carbide–copper composite coating is developed on ZE41A magnesium alloy surface using EDD. Process parameters used in the study are compaction load, current and pulse-on time, and the responses are material deposition rate (MDR) and microhardness (MH). The effects of process parameters on MDR and MH are studied. MDR and MH increased with increasing current and pulse-on time at low compaction loaded WC70-Cu30 electrode. Compaction load was found as the dominating parameter in the study followed by current and pulse-on time. Layer thicknesses of WC70-Cu30 and WC50-Cu50 electrodes are 92.12 and 72.88[Formula: see text][Formula: see text]m, respectively. MH decreased for the low compaction loaded electrode for both types of electrodes. This could be due to the minimum deposition of the tungsten particles. Uniform depositions with large spherical globules were observed at the surface deposited using WC70-Cu30 electrode. Larger craters were observed at WC50-Cu50 electrode. At the intermediate pulse-on time of WC70-Cu30 electrode, voids were formed which diminished the hardness of the surface.
Sonagiri Suresh, Baridu Vinod, Sangireddy Sunil Kumar Reddy, and Uthirapathi Elaiyarasan
Taiwan Association of Engineering and Technology Innovation
This study investigates the mechanical properties and the wear behavior of Al 7075/Al2O3/SiCNP composites. The hybrid composites are manufactured using the stir casting technique. In this work, the Al 7075 alloy is reinforced with five different weight fractions of Al2O3 and a constant SiCNp, with an average particle size of 50 nm. The aluminum metal matrix composites are examined through surface morphology and X-ray diffraction (XRD) patterns to identify the material behavior. The material characteristics and the wear behavior of the metal composites are examined using a pin-on-disk test. Wear measurements are performed by varying loads, sliding speeds, and sliding distances. The results reveal that the composites reinforced with 4% of Al2O3 particulates exhibit superior properties. The wear rate and the coefficient of friction (COF) decrease with the increase in the reinforcement content.
V. Vinoth, S. Sathiyamurthy, N. Ananthi, and U. Elaiyarasan
Inderscience Publishers
U Elaiyarasan, V Satheeshkumar, and C Senthilkumar
IOP Publishing
Abstract Electrical discharge coating is a material transfer process of EDM used for fabricating composite coating on the workpiece surface. It is applied in the several applications such as surface texturing, die and mould making industries in order to increase the wear and corrosion resistance. In this investigation, ZE41A magnesium alloy is coated with tungsten carbide- Copper (WC-Cu) powder metallurgy electrode. Electrodes are prepared under three different load conditions (150, 175 and 200 MPa). Effects of process parameters on microstructure of the coated surfaces are studied. EDC experiment is carried out by varying the process parameters viz. compaction load (CL), current (I) and pulse on time (Ton). Response characteristics considered in this study are material migration rate (MMR), layer thickness (LT) and micro hardness (MH). MMR, LT and MH increases with increase in current and pulse on time at low compaction loaded electrode. Conversely, it is decreased with low current and pulse on time at high compaction loaded. Average micro hardness of the deposited surface was 125 HV and average layer thickness was 91.6 μm. Different surface defects were identified in the deposited surface such as cracks, craters and globules. Bigger craters were observed at surface deposited with higher current (4 A) that reduced the hardness of the surface.
Narayanasamy Ananthi, Uthirapathi Elaiyarasan, Vinaitheerthan Satheeshkumar, Chinnamuthu Senthilkumar, Subbarayan Sathiyamurthy, and Kaliyamoorthi Nallathambi
EDP Sciences
Magnesium and its alloys play a vital role in various applications such as automobile, aircraft, biomedical and military etc. Mg alloys have superior characteristics such as light weight, high strength, good damping capacity and easily castability etc. Eventhough it has attractive range of properties, the machining of magnesium alloys using conventional machining methods is difficult. To overcome that issue, non traditional machining is considered as a potential process. EDM is an electro thermal process extensively used for machining hard materials. In this investigation, the ZE41A magnesium alloy is machined using EDM with copper electrode. In order to improve surface characteristics such as material removal rate (MRR) and surface roughness (SR), various parameters namely current, pulse on time and pulse off time were selected. The regression values of MRR and SR are 97.20% and 99.62% respectively indicating an empirical relationship between the parameters and responses. Pulse off time was found as a significant parameter on the response followed by pulse on time and current. MRR and SR increased with increasing current, pulse on time and pulse off time. At a current of 5A, the produced spark density is high so that the removed quantity of material from the workpiece is high. At a pulse on time of 95 μs, the spark intensity is high affecting the local temperature in the machined zone, and hence MRR increases. SR drastically increases at increasing current. At higher current, large size crater are observed on the machined surface that made the surface rough, and hence SR increases.
Uthirapathi Elaiyarasan, Vinaitheerthan Satheeshkumar, and Chinnamuthu Senthilkumar
Walter de Gruyter GmbH
Abstract The present paper elucidates an experimental study on the surface modification of a ZE41 A magnesium alloy by electrical discharge coating (EDC) process with a tungsten carbide-copper (WC-Cu) powder metallurgy (PM) electrode. Investigated EDC parameters were compaction load, current and pulse on time. Measurement of coating characteristics such as material transfer rate (MTR) and surface roughness (Ra) were undertaken on the coated workpiece. As the design of experiment, response surface methodology was applied and analysis of variance (ANOVA) test was completed to study the influence of process parameters. Mathematical models were developed for coating characteristics to optimize the parameters. In this study, the reliability of the regression model is considered satisfactory with a value larger than 99 %. It was found from the study that the current plays a vital role in increasing the material transfer rate and minimizing the surface roughness of the coated surface followed by compaction load and pulse on time. Various studies such as scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were carried out to determine the characteristics of the coated layer. These analyses confirmed the presence of the electrode materials in the coated surface.
Uthirapathi Elaiyarasan, Vinaitheerthan Satheeshkumar, and Chinnamuthu Senthilkumar
EDP Sciences
The present paper studied the experimental investigation on electrical discharge coating of ZE41A magnesium alloy (EDC) with tungsten carbide-copper (WC/Cu) powder metallurgy (PM) electrode. In order to attain the surface characteristics, three parameters were selected such as compaction load, current and pulse on time. Response characteristics such as material transfer rate (MTR) and surface roughness (Ra) were considered in this study. Central composite design in response surface methodology was applied to conduct experiments. Empirical models were developed for MTR and SR. AVOVA test was conducted to identify the most influence parameters. Additionally, optimized parameters were identified by response surface optimizer. It is observed that the current play a vital role in increasing the MTR and minimize the SR of the coated surface followed by compaction load and pulse on time. Various studies such as scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were carried out on the coated surface. Bulk mass deposition and bigger craters were observed in the surface coated with 150 MPa and 3A respectively.
U. Elaiyarasan, V. Satheeshkumar, and C. Senthilkumar
Polish Academy of Sciences Chancellery
© 2021. The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/deed.en which permits the use, redistribution of the material in any medium or format, transforming and building upon the material, provided that the article is properly cited, the use is noncommercial, and no modifications or adaptations are made. Arch. Metall. Mater. 66 (2021), 2, 391-396
U. Elaiyarasan, V. Satheeshkumar, and C. Senthilkumar
Springer Science and Business Media LLC
U. Elaiyarasan, V. Satheeshkumar, and C. Senthilkumar
Walter de Gruyter GmbH
Abstract In this study, an endeavour have been made to depositing the electrode materials over the surface of the magnesium alloy using electrical discharge machining (EDM) with WC-Cu powder compacted sintered electrode. Various process parameters such as compaction load, discharge current and pulse on time are selected to carry out the experiment in order to attain the maximum material migration rate (MMR) or deposition rate and microhardness (MH). It was concluded that the MMR and MH increased with increase in discharge current and pulse on time at low compacted electrode but it is decreased at lower discharge current and pulse on time. Highest MMR and MH were attained successfully at partial sintered low compaction load electrode. Microstructure evaluation has been carried out on deposited surface using scanning electron microscopy (SEM) and presence of electrode element in the deposited surface was confirmed by energy dispersive spectroscopy (EDS). Defects mechanism such as globules and craters are formed during EDC with high current and pulse on time respectively, which diminishes the surface roughness. It was observed that the compaction load is the influence parameter on the MMR and MH.
U Elaiyarasan, V Satheeshkumar, and C Senthilkumar
IOP Publishing
In this research, electro discharge deposited ZE41A magnesium alloy with semi sintered and sintered electrode are studied. Parameters used in this study were compaction load, current and pulse on time and coating responses were material deposition rate (MDR), micro hardness (MH). For the electrical discharge coating (EDC), electrodes were prepared using tungsten carbide and copper powder by powder metallurgy method. It was observed that the MDR and MH increased when increased current and pulse on time in low compaction load for semi sintered and sintered electrode. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were analysed in the deposited surface to study the microstructure and presence of electrode materials respectively. Comparative microstructure study on electrical discharge coating of ZE41A magnesium alloy with powder metallurgy semi sintered and sintered electrode was carried. Among two conditioned electrode, semi sintered electrode has the higher material deposition rate and micro hardness. Further increased the sintering temperature the deposition is formed with the large cracks and craters.
U. Elaiyarasan, V. Satheeshkumar, and C. Senthilkumar
Springer Science and Business Media LLC
U. Elaiyarasan, V. Satheeshkumar, and C. Senthilkumar
Inderscience Publishers
U. Elaiyarasan, V. Satheeshkumar, and C. Senthilkumar
American Scientific Publishers