rakesh kumar gunda

@mgit.ac.in

Assistant Professor, Mechanical Engineering Department
mahatma gandhi institute of technology

rakesh kumar gunda


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https://researchid.co/kumarrakeshgunda

RESEARCH, TEACHING, or OTHER INTERESTS

Mechanical Engineering, Industrial and Manufacturing Engineering, Mechanics of Materials, Aerospace Engineering
15

Scopus Publications

Scopus Publications

  • Processing of B4C particulate reinforced with aluminium die-casting-10 using automatic feeder stir squeeze casting method
    Suresh Bommanagouder, Rakesh Kumar Gunda, Chennakesava Sai Pitchi, Suresh Kumar Reddy Narala
    Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science, 2026
    This study investigates the fabrication of aluminium die-casting (ADC-10) composites with varying weight percentages of boron carbide (B 4 C) particles, using Al-5Ti-B as a grain refiner through mechanical automatic feeder stir squeeze casting process. Five compositions are developed: pure ADC-10 and blends with 0.5%, 1%, 2%, and 3% B4C, designated R-0, R-0.5, R-1, R-2, and R-3, each containing Al-5Ti-B grain refiner. The samples having 2 wt.% of B 4 C exhibit maximum grain refinement. As a result significant enhancement in hardness and toughness values are observed. However, the increase in higher reinforcement level (3 wt.%) leads to particle agglomeration thereby negatively impacting the mechanical properties. Fracture studies have indicated increased brittle failure with more B 4 C content, while the best specific strength and elongation are achieved at sample containing 2 wt.%, B 4 C. This can be attributed to improved interfacial strength and uniform particle distribution. Overall, the combination of B 4 C reinforcement and grain refinement with mechanical stir casting notably enhanced the mechanical strength of the composites, underlining the importance of particle uniformity and nucleation site development in improving mechanical properties.
  • Investigation of the Wear Behaviour of Electrostatically coated CrN Nano-Composite and Compared with Uncoated Dry and MQSL Environmental Conditions
    Rakesh Kumar Gunda
    Lecture Notes in Mechanical Engineering, 2024
  • Effect of coir fiber loading on the mechanical, thermal, and physical properties of natural composites in applications of packaging
    Vallala Srikanth, Karuka Raja Narender Reddy, Sunil Dutta, Gunda Rakesh Kumar
    Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, 2024
    An increasing number of environmental regulations have shifted the spotlight toward the creation of ecological composite materials. This study examines, the effect of loading fiber and sodium hydroxide (NaOH) surface treatment on the water absorption, mechanical, physical, thermal, and morphological characteristics of coir fibers (CF) reinforced in a Kondagogu gum (KGG) matrix. The mechanical properties enhanced with the 10 wt% of CF composites, achieving tensile, flexural, and impact values of 2.30 MPa, 2.36 MPa, and 715.74 J/m2, respectively. Furthermore, coir fibers were treated with NaOH subsequent increases in the tensile, flexural, and impact properties with 6.08%, 78.38%, and 15.13%, respectively. The scanning electron microscopic (SEM) images, Fourier transform infrared (FTIR) spectrum, and water absorption of the composites were observed to ensure their suitability in packaging applications. With their advantageous hydrophilic properties, reduced density, and ability to remain thermally stable up to 255 °C, the treated NaOH CF/KGG composite is an appropriate fit for the interiors of the automobile sector.
  • Tribological behaviour of SiC and AL2O3 filled glass-epoxy composite
    Venkata Kasi Viswanadham Kolipakula, Chandra Sekhara Kumar Aduru, Ravinder Reddy Pinninti, Rakesh Kumar Gunda
    Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology, 2022
    Metal glass fibre reinforced composites which are considered as advanced composite materials play a significant role in aerospace, marine and automotive industries. In the current study, an attempt has been made to examine the tribological characteristics of glass fibre reinforced plastic (GFRP) composite filled with aluminium oxide (Al2O3) and silicon carbide (SiC) powder particles. Experiments were performed on pin-on-disc tribometer to evaluate the friction and wear rate as a function of normal load and sliding velocity under different conditions. For each composition of glass-epoxy composite filled with and without fillers, sliding tests were performed with normal load (20 N, 40 N, 60 N, 80 N 100 N) and sliding velocity (2.62 m/s, 4.18 m/s, 5.23 m/s, 6.85 m/s, 7.85 m/s) respectively. The metal GFRP composites were fabricated using hand-lay-up technique. The filler content (SiC & Al2O3) in epoxy-glass composite were varied. SiC was varied from 0 to 10% while Al2O3 was kept constant at 5%. To study the worn surface of glass-epoxy composite material scanning electronic microscopy is used. Before and after the experiment, weights of the composites (pin specimens) were studied on digital balance for wear loss. The present studies reported that the fabricated metal epoxy-fibre composite has performed excellent wear resistance when compared with epoxy-fibre composite without metal powders. The present work findings offer new insights into reinforcement in epoxy-glass composites with metal powders.
  • Analysis of electrostatic solid lubricant spray process parameters during turning Ti-6Al-4V alloy
    Rakesh Kumar Gunda, Suresh Kumar Reddy Narala
    Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture, 2020
    Titanium alloys are considered as hard-to-cut material due to its relatively high resistance to corrosion, low thermal conductivity and high chemical reactivity. Effective penetration of sufficient amount of lubricant in the metalworking process is of utmost importance to (a) reduce frictional resistance at the high-temperature tool–workpiece interface and (b) avert the formation of built-up edge in machining process. Traditionally, the lubricant forms a thin fluid film to reduce the friction. In order to reduce or eliminate coolant usage and to apply lubri-coolant efficiently at tool–chip–workpiece interface, a novel near-dry machining technique called electrostatic charged solid lubricant spray system has been developed. In electrostatic charged solid lubricant spray technique, the aerosolized micro-droplet particles were sprayed from the nozzle tip which uses a phenomenon called contact-charge electrification principle. The quick penetration and wettability of charged atomized droplet particles are impinged with high velocity at the tool–chip interface. The focus of the present experimental research is to analyse the optimum lubrication process parameters of the experimental set-up in terms of effectively applying cutting fluid in the machining zone. The study shows that the desired atomization and machining performance of the electrostatic charged solid lubricant spray technique can be obtained by governing different spray parameters (lubricant flow rate, air pressure, spray nozzle position, nozzle distance, electrostatic voltage). The results revealed that when the charged lubricants are applied with high velocity and large number of droplets, it will have significant influence on surface roughness and cutting force. The fabricated electrostatic charged solid lubricant spray technique provides us with an efficient and economic machining solution by applying solid lubricants effectively at tool–material interface during turning of Ti-6Al-4V alloy material. The present approach and the obtained results will help in better understanding of the machinability of hard-to-cut materials in manufacturing industries.
  • Evaluation of Surface Roughness and Cutting Temperature of EN31 Steel with Varying MQSL Parameters
    Sai Kiran Chary Nalband, Kalyan Pamidimukkala, Prathik Akkapally, Muralidhar Reddy Challa, Yeshwanth Prasanna Kirupakaran, Hitesh Dammu, Ajay Thati, Sachin Jacob Abraham, Rakesh Kumar Gunda
    Iop Conference Series Materials Science and Engineering, 2020
    In the present-day manufacturing industry, achieving machining accuracy, high production rate, high material removal rate and increasing tool cutting life is becoming more vital and a particularly difficult task. Machining of hard material imposes a lot of challenges, mainly high temperature generation between tool-workpiece interface. Enormous heat generation adversely affects surface roughness, tool life, dimensional quality of the workpiece and deteriorates the tool life significantly. The use of proper lubrication in machining processes is critically important to modify the conditions of contact area by effective control over frictional interaction which should ensure change in tool-chip interface and machining mechanics. In the present work an experimental investigation was carried out on various MQSL parameters on surface roughness and tool temperature in turning EN 31 steel and the results are compared with dry turning. In order to apply lubricants at shearing interface (chip flow at the rake face of the tool) high velocity MQSL set-up is fabricated. The present work has achieved significant results and helped in concluding the influence of lubricant parameters of MQSL in turning process.
  • Effect of minimum quantity solid lubrication (MQSL) parameters on cutting force and temperature during turning of EN31 steel
    Saikiran Chary Nalband, Kalyan Pamidimukkala, Rakesh Kumar Gunda, Uma Maheshwera Reddy Paturi
    Materials Today Proceedings, 2020
    Considering the trends in the contemporary manufacturing and machining industry, dimensional accuracy, tool wear and quality of surface finish is becoming increasingly important. Hard-to-cut materials imposes two major difficulties, generation of high cutting temperature at tool and workpiece interface which subsequently leads to the increase in cutting force of the tool which ultimately increases the tool wear. The implementation of a proper lubrication system critically improves the surroundings of contact area by controlling the frictional relation which would ensure change in the machining mechanics. Minimum quantity solid lubrication (MQSL) is the process of supplying solid lubricant (molybdenum disulfide and graphite) along with oil at minimum quantities. In the present study turning experiments were performed by varying MQSL parameters (nozzle distance, compressed air pressure, lubricant flow rate and concentration of solid in lubricant) to comprehend the MQSL performance on cutting force and cutting temperature in turning EN31 steel. For this, a portable and cost-effective high velocity MQSL set-up was developed. MQSL performance was compared with wet and dry turning results. The present work offers a comprehensive picture which helps in ultimate the effect of lubricant parameters of MQSL in turning of EN31 steel.
  • Finite element simulations of machinability parameters in turning of Inconel 718
    Uma Maheshwera Reddy Paturi, Sumanth Methuku, Sumanth S. Siripragada, Yeshwanth Sangishetty, Rakesh Kumar Gunda
    Materials Today Proceedings, 2020
    Investigations of machinability characteristics by practical machining runs are inevitably tedious and costly routes. The aim of the current work is to model and simulate machinability characteristics in turning of Inconel 718. The DEFORM 3D finite element (FE) software was employed for this purpose. Machinability parameters like cutting force, cutting temperature, tool wear and chip formations are predicted under different cutting conditions. The predicted machinability parameters in this study are related with the experimental results found in the literature. A significant agreement has been observed between the obtained values through FE simulations and the values follow the trend when compared with results found in the literature. The FE simulations provide some direction to machinists to select the best possible cutting conditions for practical machining without conducting too many costly experimental runs.
  • Tribological studies of EN31 steel and Ti-6Al-4V alloy materials using pin-on-disc tribometer
    Gunda Rakesh Kumar, Narala Suresh Kumar Reddy
    Materials Today Proceedings, 2019
  • Electrostatic high-velocity solid lubricant machining system for performance improvement of turning Ti–6Al–4V alloy
    Rakesh Kumar Gunda, Suresh Kumar Reddy Narala
    Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture, 2019
    In any machining operation, a major division of energy is converted into heat which creates detrimental effects on tool wear, tool life and surface quality of machined work material. Effective cooling/lubrication in the machining zone is essential to improve friction and temperatures by efficient heat dissipation which increases tool life and surface quality. But adverse health effects caused by use of flood cooling are drawing manufacturers’ attention to develop methods for controlling occupational exposure to cutting fluids. In demanding the improvement of productivity and product quality of machining, use of solid lubricant thin film was suggested as one of the necessary alternative machining techniques to apply lubricants effectively to the high-temperature zone. There is a general concern in the machining process in terms of applying lubricants effectively to the machining zone. Therefore, this research work contributes to the development of a novel approach to apply lubricants effectively to the rake face and flank face of the cutting tool without polluting the environment. Electrostatic high-velocity solid lubricant assisted machining is a novel technique used in the machining process with a very low flow rate (1–20 mL/h) to enhance the process performance of turning difficult-to-cut materials. The performance of electrostatic high-velocity solid lubricant technique is studied in comparison to minimum quantity solid lubricant, minimum quantity lubricant and dry and wet (flood cooling) to assess the performance considering surface roughness, cutting force and tool wear as performance indices. The experimental results revealed that electrostatic high-velocity solid lubricant with MoS2 solid lubricant at low volume and constant flow rate has observed high potential to apply lubricants effectively in the machining zone when compared with the considered environmental conditions. This work is expected to form a scientific basis toward developing electrostatic high-velocity solid lubricant technique for reducing the manufacturing impact in the machining of aerospace components such as Ti–6Al–4V alloy in terms of both machinability and environmental perspectives.
  • Experimental investigation to study the performance of solid lubricant during turning EN31 steel and Ti-6Al-4V alloy
    Rakesh Kumar Gunda, Suresh Kumar Reddy Narala, Venkata Kasi Viswanadham Kolipakula, Sreenivasulu Reddy Goda
    Materials Today Proceedings, 2019
  • Evaluation of friction and wear characteristics of electrostatic solid lubricant at different sliding conditions
    Rakesh Kumar Gunda, Suresh Kumar Reddy Narala
    Surface and Coatings Technology, 2017
  • Performance assessment of MQSL: Minimum quantity solid lubricant during turning of Inconel 718
    A Marques, Suresh Kumar Reddy Narala, AR Machado, Rakesh Kumar Gunda, Sravan Kumar Josyula, RB Da Silva, MB Da Silva
    Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture, 2017
  • Tribological studies to analyze the effect of solid lubricant particle size on friction and wear behaviour of Ti-6Al-4V alloy
    Rakesh Kumar Gunda, Suresh Kumar Reddy Narala
    Surface and Coatings Technology, 2016
  • A Novel Technique to Achieve Sustainable Machining System
    Rakesh Kumar Gunda, Narala Suresh Kumar Reddy, H.A. Kishawy
    Procedia CIRP, 2016