P S SATHEESH KUMAR
@nprcet.org
Head & Professor, Department of Science & Humanities
NPR College of Engineering and Technology
RESEARCH, TEACHING, or OTHER INTERESTS
Materials Science, Condensed Matter Physics, Surfaces, Coatings and Films
Scopus Publications
Scopus Publications
Nitin Kundlik Kamble, R. S. Sankarasubramanian, P. S. Satheesh Kumar, Balachandra Pattanaik, Ram Subbiah, Suresh Seetharaman, and P. Satishkumar
Springer Science and Business Media LLC
S. Vijayakumar, P. S. Satheesh Kumar, Pappula Sampath kumar, Selvaraj Manickam, Gurumurthy B. Ramaiah, and Hari Prasadarao Pydi
Hindawi Limited
This present investigation focusing on preparation of Al-based hybrid composites in which Al6082 is engaged as the main alloy reinforced with two reinforcements of ZrSiO₄/TiC. The combination of the stir-squeeze process helps to make different specimen by change of four parameters such as stir speed, stir time, reinforcements, and squeeze pressure. In this process, two reinforcements are reserved as constant about 7.5 wt%. The four levels of each parameter are stir speed (300, 400, 500, and 600 rpm), stir time (10, 15, 20, and 25 min), reinforcement (2.5, 5, 7.5, and 10 wt%), and squeeze pressure (50, 60,70, and 80 MPa). According to the L16 orthogonal array Taguchi design, the specimens are created to analyze the mechanical properties of tensile strength and hardness along with porosity. In addition, the optimization technique is used to determine the optimal parameter on improving tensile strength. The optimization process can be assisted by the software namely Minitab-17 which helps to study analysis of variance, regression model, and contour plots. The observed result of ANOVA showed that stir speed (41.8%) is the maximum influenced parameter that increases TS, followed by squeeze pressure (25.7%), stir time (12.7%), and reinforcement (1.96%), and optimum tensile strength is found at the parameters of stir speed 600 rpm, stir time 10 min, reinforcement 2.5 wt%, and squeeze pressure 80 MPa. The fractured surface of tensile strength also examined by the SEM test. The combined parameters of S4-T1-R1-P4 achieve the highest TS, and it is observed that there are nearly no pore defects and good diffusion as a result of the reinforcements to be properly mixed. It is noticeable that the TiC and Al 6082 matrix, as well as the various ZrSiO4 exhibit stronger bonds.
A. U. Rao, K. Ramasamy, A. Pradeep, P. S. Satheesh Kumar, Srikanth Karumuri, and Bhiksha Gugulothu
Hindawi Limited
This research concentrated on material characteristics such as tensile property (TS) and hardness (HV) for AA-5083 manufactured using the stir casting (SC) process. The reinforcing elements silicon carbide (SiC-7.5%) and flyash (FA-5%) in the form of powders will be added to Al alloy to improve the characteristics of composites. Response surface methodology (RSM) was a scientific technique to make optimizing task at stir casting parameters. As per central composite design (CCD), 20 samples (L1-L20) were fabricated at a variation of factors such as stirrer speed (A) 350-550 rpm, stir time (B) 15-35 min, and stir temperature (C) 750-950°C. The result presented that best TS and HV exhibited at experiments L5 (A2-450 rpm, B1-15min, and C1-750°C) and L6 (A1-350 rpm, B1-15min, and C1-750°C). Design expert software (DES) is one of the optimization tools that employed to determine analysis of variance (ANOVA) and the best optimal parameter levels of SC. ANOVA helped to check contribution of SC factors on TS and HV, and it was noticed that mechanical properties were improved with increasing stir speed and stir time but it was reduced with rising of temperature.
Bhiksha Gugulothu, P. S. Satheesh Kumar, Bathula Srinivas, Alapati Ramakrishna, and S. Vijayakumar
Hindawi Limited
This study explained about machining parameters of Al5086/Flyash/Sic hybrid metal matrix composites by the Taguchi technique. Al5086 reinforced in SiC (5–10 wt %) and 8% weight of flyash are retained as constants. The specimens are prepared with the help of the stir casting method. The material removal rate was examined by electrochemical machining under various parameters such as feed rate (0.15–0.30 mm/min), voltage (10–20 V), and electrolyte concentration (20–35 g/litre). Taguchi’s L16 orthogonal array was selected for design of experiments (DOEs), and 16 experimental tests were conducted to examine the effect of the selected machining parameters employed to identify the best optimal levels and also to investigate the effect of electrochemical machining parameters on MRR determined by Minitab-18.
R. Sangeetha, K. Karthigaivel, and P.S. Satheesh Kumar
Elsevier BV
P.S. Satheesh Kumar, R. Sangeetha, R. Sivakumar, and L. Amalraj
Elsevier BV
Abstract SnSe thin films were prepared by nebulized spray deposition method at different substrate temperature of 250–325 °C. The effects of deposition temperature on the structural, morphological, electrical and optical properties of the films were evaluated using XRD, SEM, Hall Effect, UV and PL. The X-ray diffraction study reveals that the all films present an orthorhombic structure of preferred orientation along the (1 1 1) direction. From the recorded optical data indicates the existence of direct allowed band gap in the range of 1.14–1.24 eV was obtained. The electrical resistivity shows that the prepared films are semiconducting nature and resistivity is found to be low at the temperature of 300 °C.
Palanichamy S., Raj Mohamed J., Deva Arun Kumar K., Satheesh Kumar P.S., Pandiarajan S., and Amalraj L.
Elsevier BV
S. Palanichamy, J. Raj Mohamed, P. S. Satheesh Kumar, S. Pandiarajan, and L. Amalraj
Springer Science and Business Media LLC
S. Palanichamy, J. Raj Mohamed, P. S. Satheesh Kumar, S. Pandiarajan, and L. Amalraj
Springer Science and Business Media LLC
T. Rajesh Kumar, M. Vimalan, P. S. Satheesh Kumar, P. Sagayaraj, Alka B. Garg, R. Mittal, and R. Mukhopadhyay
AIP
Single crystals of bimetallic ZnCd(SCN)4 (abbreviated as ZCTC) are grown by slow cooling method and third order optical nonlinearities are investigated by single beam Z‐scan technique with a He:Ne laser operated at 632.8 nm. The nonlinear refractive index, absorption coefficient and third order susceptibility are estimated to be −1.76×10−12cm2/W, 8.65×10−6cm/W and 6.05×10−9esu respectively. The surface feature is investigated by AFM.