Sunil Kumar

@amrita.edu

Assistant Professor, Department of Mechanical Engineering
Amrita Vishwa Vidyapeetham, Chennai Campus



              

https://researchid.co/sunilnits18

RESEARCH INTERESTS

Thin film, Tribology, Surface modification, Optimization, Product Design, Multi-Criteria Decision-Making

57

Scopus Publications

881

Scholar Citations

18

Scholar h-index

29

Scholar i10-index

Scopus Publications

  • An Optimal Family of Eighth-Order Methods for Multiple-Roots and Their Complex Dynamics
    Sunil Kumar, Janak Raj Sharma, and Lorentz Jäntschi
    MDPI AG
    We present a new family of optimal eighth-order numerical methods for finding the multiple zeros of nonlinear functions. The methodology used for constructing the iterative scheme is based on the approach called the ‘weight factor approach’. This approach ingeniously combines weight functions to enhance convergence properties and stability. An extensive convergence analysis is conducted to prove that the proposed scheme achieves optimal eighth-order convergence, providing a significant improvement in efficiency over lower-order methods. Furthermore, the applicability of these novel methods to some real-world problems is demonstrated, showcasing their superior performance in terms of speed and accuracy. This is illustrated through a series of three examples involving basins of attraction with reflection symmetry, confirming the dominance of the new methods over existing counterparts. The examples highlight not only the robustness and precision of the proposed methods but also their practical utility in solving the complex nonlinear equations encountered in various scientific and engineering domains. Consequently, these eighth-order methods hold great promise for advancing computational techniques in fields that require the resolution of multiple roots with high precision.

  • Investigating tool wear rate and surface quality of hardened tool steel: a fuzzy-MARCOS analysis and response surface methodology study
    P. V. Ahijith Kumar, Lokeswar Patnaik, Kiran Bharati, V. S. S. Venkatesh, and Sunil Kumar
    Springer Science and Business Media LLC


  • Coating material selection for bulk metal forming dies: A MEREC-integrated approach with multiple MCDM methods
    Sunil Kumar, P. V. Ahijith Kumar, Kiran Bharati, Lokeswar Patnaik, Saikat Ranjan Maity, and Magdalena Łepicka
    Springer Science and Business Media LLC

  • Predictive Analytics for Website User Behavior Analysis
    Pawan Vankhede and Sunil Kumar
    IEEE
    This study examines the application of predictive analytics to user behavior analysis on websites, with a particular emphasis on a dataset of customer behavior from e-commerce. To forecast behavioral patterns, the study will apply the random forest method. Additionally, exploratory data analysis (EDA) will be carried out to extract insights from the dataset. The dataset employed in this study includes a variety of factors, such as purchase history, browsing habits, and consumer demographics, among other pertinent data. The research attempts to derive useful insights that can improve the comprehension and prediction of user behavior on the website by utilizing predictive analytics approaches. In this study, the random forest algorithm which is well-known for its capacity to manage intricate datasets and generate precise predictions is employed. The method builds several decision trees and combines their predictions to produce more reliable and accurate outcomes by utilizing ensemble learning. Predicting different aspects of user behavior, including browsing patterns, chance of making a purchase, and customer segmentation, is the aim. When paired with the insights from EDA, the outcomes of the behavioral analysis prediction made with the random forest algorithm can provide e-commerce companies with useful data. Gaining insight into user behavior can help with customer engagement, website design optimization, personalization, and overall user experience enhancement.

  • Multi-step methods for equations
    Sunil Kumar, Janak Raj Sharma, and Ioannis K. Argyros
    Springer Science and Business Media LLC

  • Vibration Analysis of Cracked Cantilever Beam Using Response Surface Methodology
    DevDatt Pathak, Subrata Kushari, SaikatRanjan Maity, Lokeswar Patnaik, Sunil Kumar, and Sudip Dey
    Springer Science and Business Media LLC

  • Processing and evaluation of nano SiC reinforced aluminium composite synthesized through ultrasonically assisted stir casting process
    V.S.S. Venkatesh, Ganji Prabhakara Rao, Lokeswar Patnaik, Nakul Gupta, Sunil Kumar, Kuldeep K. Saxena, B.D.Y. Sunil, Sayed M. Eldin, and Fatima Hiader Kutham Al- kafaji
    Elsevier BV

  • A NOVEL BWM INTEGRATED MABAC DECISION-MAKING APPROACH TO OPTIMIZE THE WEAR PARAMETER OF CRN/TIALSIN COATING
    Sunil Kumar, , Saikat Ranjan Maity, Lokeswar Patnaik, and
    American Institute of Mathematical Sciences (AIMS)
    <p style='text-indent:20px;'>Using a multi-criteria decision-making (MCDM) method combined with a Taguchi (<inline-formula><tex-math id="M1">\\begin{document}$ L_{16} $\\end{document}</tex-math></inline-formula>) design of experiment, the wear parameter for CrN/TiAlSiN coated hardened DAC-10 tool steel is optimized. Temperature, sliding velocity, applied load, and sliding distance together forms the wear parameter. Wear rate, friction coefficient, surface roughness, wear depth, and worn surface hardness were all tested to see how it affected by the wear parameters. The criteria weight was derived using the best-worst method (BWM) and combined with the Multi-Attributive Border Approximation area Comparison (MABAC) approach to rank the alternatives. The obtained data were then subjected to sensitivity testing using three-phase techniques. The suggested MCDM technique was validated through all phases of sensitivity analysis, with alternative <inline-formula><tex-math id="M2">\\begin{document}$ {WP}_6 $\\end{document}</tex-math></inline-formula> (T = 100 <inline-formula><tex-math id="M3">\\begin{document}$ ^{\\circ} $\\end{document}</tex-math></inline-formula>C, Sv = 0.05 m/s, L = 5 N, and Sd = 2000 m) showing as the best alternative. Furthermore, the proposed method BWM-MABAC was tested on previously published outcomes, and the results showed an excellent correlation between present and past studies, with a rank correlation coefficient value of greater than 0.99.</p>

  • Fuzzy CODAS Based Analysis of Wear and Temperature Induced Responses of Si Doped a-C film and CFRPEEK Tribopair
    Lokeswar Patnaik, Sunil Kumar, Saikat Ranjan Maity, Magdalena Łępicka, and A. Anderson
    Springer Science and Business Media LLC

  • Wear parameter optimization for CrN/TiAlSiN coating using novel BWM integrated TODIM decision-making approach
    Sunil Kumar, Lokeswar Patnaik, Syed Mahammad Shafi, V. S. S. Venkatesh, and Saikat Ranjan Maity
    Springer Science and Business Media LLC

  • Wear Parameter Optimization of Ceramic Coating Using the Fuzzy Integrated PSI-CODAS Decision-Making Framework
    Sunil Kumar, Saikat Ranjan Maity, and Lokeswar Patnaik
    Springer Science and Business Media LLC

  • Effect and optimization of tribological parameters upon wear responses of TiAlN coating
    Sunil Kumar, Saikat Ranjan Maity, and Lokeswar Patnaik
    Thomas Telford Ltd.
    This study investigated the relative effects of tribological process parameters and their optimization for wear responses of a TiAlN thin film deposited on heat-treated and plasma-nitrided novel MDC-K hot work tool steel. The effects of tribological process parameters were studied by conducting a tribological test on the TiAlN thin film against a tungsten carbide (WC) counterbody. The researchers considered three tribological process parameters – namely, sliding velocity, applied load and sliding distance – to conduct the tribological test and study the effect of the parameters on five different wear responses – namely, friction coefficient, surface roughness (R a), wear depth, wear mass loss and hardness. The relative effects of the process parameters were studied using contour plots, and the individual effects and contributions were analyzed using an analysis of variance test. Further, the overall evaluation criteria method was employed to select the optimal settings of tribological process parameters based on the experimental results. Finally, the surface morphology of the worn TiAlN surface against the best and worst parametric settings was evaluated using scanning electron microscopy integrated with energy-dispersive X-ray spectroscopy to investigate the underlying wear mechanisms.

  • EXTENDED COMPARISON BETWEEN TWO NEWTON-JARRATT SIXTH ORDER SCHEMES FOR NONLINEAR MODELS UNDER THE SAME SET OF CONDITIONS
    Janak Raj Sharma, Sunil Kumar, Ioannis K. Argyros, and Christopher I. Argyros
    Institute of Mathematics, Polish Academy of Sciences


  • Effect of wear parameters and their optimization for wear characteristics of TiCrN thin film using novel MCDM method
    Gurram Hareesh, Lokeswar Patnaik, Shubrajit Bhaumik, Saikat Ranjan Maity, and Sunil Kumar
    Elsevier BV

  • Hydroxyapatite/si-doped tin interlayer coatings as potential candidates for surface modification of medical-grade 316 LVM stainless steel for bioimplant applications
    SYED MAHAMMAD SHAFI, LOKESWAR PATNAIK, SAIKAT RANJAN MAITY, SUNIL KUMAR, KULDEEP K. SAXENA, CHANDER PRAKASH, and DHARAM BUDDHI
    World Scientific Pub Co Pte Ltd
    Hydroxyapatite (HAp) was deposited by plasma spraying technique with TiSiN adhesive interlayer on the medical-grade 316 LVM stainless steel. The surface topographies of HAp and HAp/TiSiN were evaluated using X-ray diffraction (XRD), Raman spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The important mechanical properties of the films such as hardness ([Formula: see text]) and elastic modulus ([Formula: see text]) were determined by the nanoindentation test. Lastly, the adhesion and anti-scratch behaviors of the films were evaluated by Rockwell-C indentation and nanoscratch test, respectively. The elemental analysis showed the values of Ca/P (at.%/at.%) ratio to be 1.80 and 1.59 in HAp and HAp/TiSiN coatings, respectively. The mechanical properties of HAp film with TiSiN interlayer were greatly improved from 1.23[Formula: see text][Formula: see text][Formula: see text]0.26[Formula: see text]GPa to 10.6[Formula: see text][Formula: see text][Formula: see text]1.12[Formula: see text]GPa for hardness and from 18[Formula: see text][Formula: see text][Formula: see text]3[Formula: see text]GPa and 29.8[Formula: see text][Formula: see text] 5[Formula: see text]GPa for elastic modulus, respectively. The results of the Rockwell-C indentation test showed a significant reduction in HAp coating delamination with TiSiN interlayer which can be categorized with HF2 or HF3 Daimler–Benz quality ranking. What is more, the nanoscratch profile of HAp coating showed wider scratch with evidence of deformation at the edges which got significantly reduced with the TiSiN interlayer. The results are suggestive of improved mechanical properties, viz. hardness and elastic modulus, and improved adhesion strength of HAp coating with TiSiN interlayer.

  • Carbon-fibre-reinforced-PEEK and silicon doped amorphous carbon as a potential tribopair for implant application
    Lokeswar Patnaik, Sunil Kumar, Jatin Gajjar, Amarapalli Deepak, Jayketh Naidana, V.S.S. Venkatesh, Magdalena Lepicka, Saikat Ranjan Maity, Syed Mahammad Shafi, and Shiela Chetri
    Informa UK Limited

  • Parametric Optimization of Tribological Process Parameters and Their Comparative Effect on Wear Responses of TiCrN Coated Cold Work Tool Steel
    Sunil Kumar, Saikat Ranjan Maity, Lokeswar Patnaik, and Sumit Bhowmik
    Springer Nature Singapore

  • Effect of Surface Modification on the Nanomechanical and Wear Properties of AISI D3 Cold Work Tool Steel
    Sunil Kumar, Saikat Ranjan Maity, and Lokeswar Patnaik
    Springer Nature Singapore

  • Effect of Mean Stress on Ratcheting of Austenitic Stainless Steel (AISI 304) at Room Temperature
    Saikat Ranjan Maity, Sunil Kumar, and Lokeswar Patnaik
    Pleiades Publishing Ltd

  • Application of Integrated BWM Fuzzy-MARCOS Approach for Coating Material Selection in Tooling Industries
    Sunil Kumar, Shubrajit Bhaumik, Lokeswar Patnaik, Saikat Ranjan Maity, and Viorel Paleu
    MDPI AG
    The life of metal forming dies and the efficiency of tooling industries depends on the mechanical and wear properties of tool steel. These properties can be further improved by depositing the ceramic coating on heat-treated tool steel. Numerous coating materials with various excellent features are already available commercially; however, the selection of the best coating material is still an immense challenge for users. Compared to various studies related to material selection problems in the contrasting area of utilization, remarkably, little research work has been done in tooling industries. In the present work, we have identified eight coating materials (alternatives) and nine evaluation criteria under the consultation of an expert in the tooling application and tribological field. To deal with this coating material selection problem, an integrated fuzzy-multi attributed decision-making method is proposed which comprises best worst method and fuzzy-Measurement Alternatives and Ranking according to the Compromise Solution method. This integrated fuzzy- multi attributed decision-making method is used to evaluate the alternatives, and the obtained results were scrutinized via utilizing various sensitivity analysis procedures. In the first phase of analysis, seven scenarios of criteria weight change were used, which was derived by the best-worst method; dynamic matrices are used in the second phase of analysis. In the third and fourth phases, obtained ranks were compared with those obtained by different weight calculation methods and ranking methods, respectively. In the present study, AlCrN/TiAlN coating (alternative Cm5) was found to be the best coating material based on the results obtained after sensitivity analysis. Further, in this study, we have proposed a novel method that helps to solve the coating material selection problem or any kind of selection complications.

  • Morphology and Wear Behavior of Monolayer TiAlN and Composite AlCrN/TiAlN-Coated Plasma-Nitrided DAC-10 Tool Steel
    Sunil Kumar, Saikat Ranjan Maity, and Lokeswar Patnaik
    Springer Science and Business Media LLC

  • Comparative study on the structural make-up and mechanical behavior of silicon and silver doped amorphous carbon films
    Lokeswar Patnaik, Saikat Ranjan Maity, and Sunil Kumar
    Springer Science and Business Media LLC


RECENT SCHOLAR PUBLICATIONS

  • Optimization of spark plasma sintered parameters of Al–SiC–kaolin hybrid composite using Taguchi–grey relational analysis
    VSS Venkatesh, PR Ganji, S Kumar, L Patnaik
    Bulletin of Materials Science 48 (1), 1-13 2025

  • Box–Behnken based investigation of surface quality and tool wear rate and FEM analysis of tool wear in TiAlN/CrN coated carbide tool
    L Patnaik, S Kumar, J Gajjar, P Dash, SR Maity, M Łępicka, PB Devi
    International Journal on Interactive Design and Manufacturing (IJIDeM) 18 (9 2024

  • Carbon-fibre-reinforced-PEEK and silicon doped amorphous carbon as a potential tribopair for implant application
    L Patnaik, S Kumar, J Gajjar, A Deepak, J Naidana, VSS Venkatesh, ...
    Advances in Materials and Processing Technologies 10 (4), 2761-2779 2024

  • Investigating tool wear rate and surface quality of hardened tool steel: a fuzzy-MARCOS analysis and response surface methodology study
    PV Ahijith Kumar, L Patnaik, K Bharati, VSS Venkatesh, S Kumar
    International Journal on Interactive Design and Manufacturing (IJIDeM) 18 (6 2024

  • Coating material selection for bulk metal forming dies: A MEREC-integrated approach with multiple MCDM methods
    S Kumar, PV Ahijith Kumar, K Bharati, L Patnaik, S Ranjan Maity, ...
    International Journal on Interactive Design and Manufacturing (IJIDeM), 1-16 2024

  • Comparative study on surface modification of heat-treated hot work tool steel using plasma nitriding and thin film deposition technique
    AJ Ashvita, L Patnaik, SR Maity, S Kumar
    Materials Today: Proceedings 2024

  • Vibration analysis of cracked cantilever beam using response surface methodology
    DD Pathak, S Kushari, SR Maity, L Patnaik, S Kumar, S Dey
    Journal of Vibration Engineering & Technologies 11 (5), 2429-2452 2023

  • Processing and evaluation of nano SiC reinforced aluminium composite synthesized through ultrasonically assisted stir casting process
    VSS Venkatesh, GP Rao, L Patnaik, N Gupta, S Kumar, KK Saxena, ...
    Journal of Materials Research and Technology 24, 7394-7408 2023

  • Effect of wear parameters and their optimization for wear characteristics of TiCrN thin film using novel MCDM method
    G Hareesh, L Patnaik, S Bhaumik, SR Maity, S Kumar
    Materials Today: Proceedings 2023

  • Fuzzy CODAS based analysis of wear and temperature induced responses of Si doped aC film and CFRPEEK tribopair
    L Patnaik, S Kumar, SR Maity, M Łępicka, A Anderson
    Silicon 15 (6), 2829-2847 2023

  • Wear parameter optimization for CrN/TiAlSiN coating using novel BWM integrated TODIM decision-making approach
    S Kumar, L Patnaik, SM Shafi, VSS Venkatesh, SR Maity
    International Journal on Interactive Design and Manufacturing (IJIDeM) 17 (2 2023

  • A novel BWM integrated MABAC decision-making approach to optimize the wear parameter of CrN/TiAlSiN coating
    S Kumar, SR Maity, L Patnaik
    Journal of Industrial and Management Optimization 19 (4), 2676-2703 2023

  • Wear parameter optimization of ceramic coating using the fuzzy integrated PSI-CODAS decision-making framework
    S Kumar, SR Maity, L Patnaik
    Arabian Journal for Science and Engineering 48 (3), 3819-3841 2023

  • HYDROXYAPATITE/Si-DOPED TiN INTERLAYER COATINGS AS POTENTIAL CANDIDATES FOR SURFACE MODIFICATION OF MEDICAL-GRADE 316 LVM STAINLESS STEEL FOR BIOIMPLANT APPLICATIONS
    SM Shafi, L Patnaik, SR Maity, S Kumar, KK Saxena, C Prakash, ...
    Surface Review and Letters, 2340004 2023

  • Effect and optimization of tribological parameters upon wear responses of TiAlN coating
    S Kumar, SR Maity, L Patnaik
    Emerging Materials Research 12 (1), 68-77 2023

  • Susceptor-Assisted Rapid Microwave Sintering of Al-Kaolin Composite in a Single-Mode Cavity
    VSS Venkatesh, S Kumar, L Patnaik
    Archives of Metallurgy and Materials, 799-806-799-806 2023

  • Effect of Mean Stress on Ratcheting of Austenitic Stainless Steel (AISI 304) at Room Temperature
    SR Maity, S Kumar, L Patnaik
    Physics of Metals and Metallography 123 (14), 1509-1517 2022

  • Morphology and wear behavior of monolayer TiAlN and composite AlCrN/TiAlN-coated plasma-nitrided DAC-10 tool steel
    S Kumar, SR Maity, L Patnaik
    Arabian Journal for Science and Engineering 47 (12), 15519-15538 2022

  • Enhancement of microstructure and mechanical performance of spray formed Al-6Si-18Pb alloy by warm rolling
    B Venkata Ramana Reddy, SR Maity, L Patnaik, S Kumar, KM Pandey
    Advances in Materials and Processing Technologies 8 (sup4), 2262-2276 2022

  • Relative effect of wear parameters on the wear behavior of TiAlN coated tool steel and parametric optimization using MCDM method
    S Kumar, L Patnaik, SM Shafi, SR Maity
    Advances in Materials and Processing Technologies 8 (sup4), 1961-1982 2022

MOST CITED SCHOLAR PUBLICATIONS

  • Comprehensive structural, nanomechanical and tribological evaluation of silver doped DLC thin film coating with chromium interlayer (Ag-DLC/Cr) for biomedical application
    L Patnaik, SR Maity, S Kumar
    Ceramics International 46 (14), 22805-22818 2020
    Citations: 83

  • Friction and tribological behavior of bare nitrided, TiAlN and AlCrN coated MDC-K hot work tool steel
    S Kumar, SR Maity, L Patnaik
    Ceramics International 46 (11), 17280-17294 2020
    Citations: 80

  • Status of nickel free stainless steel in biomedical field: A review of last 10 years and what else can be done
    L Patnaik, SR Maity, S Kumar
    Materials Today: Proceedings 26, 638-643 2020
    Citations: 78

  • Effect of heat treatment and TiN coating on AISI O1 cold work tool steel
    S Kumar, SR Maity, L Patnaik
    Materials Today: Proceedings 26, 685-688 2020
    Citations: 48

  • Effect of tribological process parameters on the wear and frictional behaviour of Cr-(CrN/TiN) composite coating: an experimental and analytical study
    S Kumar, SR Maity, L Patnaik
    Ceramics International 47 (11), 16018-16028 2021
    Citations: 46

  • Mechanical and tribological assessment of composite AlCrN or aC: Ag-based thin films for implant application
    L Patnaik, SR Maity, S Kumar
    Ceramics International 47 (5), 6736-6752 2021
    Citations: 42

  • Processing and evaluation of nano SiC reinforced aluminium composite synthesized through ultrasonically assisted stir casting process
    VSS Venkatesh, GP Rao, L Patnaik, N Gupta, S Kumar, KK Saxena, ...
    Journal of Materials Research and Technology 24, 7394-7408 2023
    Citations: 39

  • Optimization of surface roughness and material removal rate in milling of AISI 1005 carbon steel using Taguchi approach
    S Kumar, I Saravanan, L Patnaik
    Materials Today: Proceedings 22, 654-658 2020
    Citations: 39

  • Modeling of wear parameters and multi-criteria optimization by box-behnken design of AlCrN thin film against gamma-irradiated Ti6Al4V Counterbody
    L Patnaik, SR Maity, S Kumar
    Ceramics International 47 (14), 20494-20511 2021
    Citations: 30

  • Die casting parameters and simulations for crankcase of automobile using MAGMAsoft
    L Patnaik, I Saravanan, S Kumar
    Materials Today: Proceedings 22, 563-571 2020
    Citations: 27

  • Effect of lubricated sliding wear against CFRPEEK on the nanomechanical properties of Ag alloyed Cr/DLC thin film
    L Patnaik, SR Maity, S Kumar
    Journal of the Mechanical Behavior of Biomedical Materials 118, 104478 2021
    Citations: 24

  • Morphology and wear behavior of monolayer TiAlN and composite AlCrN/TiAlN-coated plasma-nitrided DAC-10 tool steel
    S Kumar, SR Maity, L Patnaik
    Arabian Journal for Science and Engineering 47 (12), 15519-15538 2022
    Citations: 22

  • A comparative study on wear behaviors of hot work and cold work tool steel with same hardness under dry sliding tribological test
    S Kumar, SR Maity, L Patnaik
    Materials Today: Proceedings 44, 949-954 2021
    Citations: 22

  • Mechanical and scratch behaviour of TiAlN coated and 3D printed H13 tool steel
    S Kumar, SR Maity, L Patnaik
    Advances in Materials and Processing Technologies 8 (sup2), 337-351 2022
    Citations: 21

  • Evaluation of crack resistance and adhesive energy of AlCrN and Ag doped aC films deposited on chrome nitrided 316 LVM stainless steel
    L Patnaik, SR Maity, S Kumar
    Advances in Materials and Processing Technologies 8 (sup3), 1048-1069 2022
    Citations: 20

  • Wear assessment of Cr2O3‐/TiAlN‐coated DAC‐10 tool steel against steel and Al2O3 counterbodies
    S Kumar, SR Maity, L Patnaik
    International Journal of Applied Ceramic Technology 19 (3), 1678-1690 2022
    Citations: 20

  • Lubricated sliding of CFRPEEK/AlCrN film tribo-pair and its effect on the mechanical properties and structural integrity of the AlCrN film
    L Patnaik, SR Maity, S Kumar
    Materials Chemistry and Physics 273, 124980 2021
    Citations: 20

  • Optimization of wear parameters for Duplex-TiAlN coated MDC-K tool steel using fuzzy mcdm techniques
    S Kumar, SR Maity, L Patnaik
    Operational Research in Engineering Sciences: Theory and Applications 5 (3 2022
    Citations: 19

  • Effect of annealing on structural, mechanical and tribological properties of Cr-(CrN/TiAlN) coating
    S Kumar, SR Maity, L Patnaik
    Advances in Materials and Processing Technologies 8 (sup3), 1569-1582 2022
    Citations: 18

  • DLC/CrN or AlCrN/CrN composite films: The better candidate in terms of anti-Wear performance and lesser ion release in hip implant
    L Patnaik, SR Maity, S Kumar
    Materials Today: Proceedings 44, 1214-1220 2021
    Citations: 17