Dr. Madeva Nagaral
@hal-india.co in
Manager (Design) Aircraft Research and Design Centre
Hindustan Aeronautics Limited, Bangalore
Dr. Madeva Nagaral is working as a Manager in Configuration and Mass Properties Group, Aircraft Research and Design Centre (ARDC), Hindustan Aeronautics Limited (HAL). He has done his BE and M.Tech from Basaveshwar Engineering College, Bagalkot. He has pursued his Ph.D from Visvesvaraya Technological University, Belagavi in the year 2020 in the field of Mechanical Engineering and Sciences. Previously, he worked as an Assistant Professor in the Department of Mechanical Engineering, MVJ College of Engineering, Bangalore, for the period of three years (2009-2011). Also, has worked as an Engineer in Bharat Electronics Limited, for the period of one year.
Aerospace domain requires lightweight and high strength advanced materials. As a part of these requirements a lot of research is carried out all over the world. Always in the aerospace since long Al-alloys and Ti-alloys are playing huge role in the development of aircrafts and satellites.
If one uses the Al alloys the strength will be n
EDUCATION
Ph.D in Mechanical Engineering Sciences
RESEARCH INTERESTS
Advanced Aerospace Materials, Additive Manufacturing, Diffusion Bonding, Metal composites, polymer Composites, Testing of materials
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Rashmi P. Shetty, T. Hemanth Raju, Madeva Nagaral, Nithin Kumar, and V. Auradi
Springer Science and Business Media LLC
Babu Erappa Rajj, Madeva Nagaral, Sanjay Chintakindi, Raman Kumar, Ali E. Anqi, Ali A. Rajhi, Alaauldeen A. Duhduh, Gedala Sridevi, Chander Prakash, Raman Kumar,et al.
American Chemical Society (ACS)
Aluminum metal cast composites (AMCCs) are frequently used in high-tech sectors such as automobiles, aerospace, biomedical, electronics, and others to fabricate precise and especially responsible parts. The mechanical and wear behavior of the metal matrix composites (MMCs) is anticipated to be influenced by the cooling agent’s action and the cooling temperature. This research paper presents the findings of a series of tests to investigate the mechanical, wear, and fracture behavior of hybrid MMCs made of Al7075 reinforced by varying wt % of nano-sized Al2O3 and Gr and quenched with water and ice cubes. The heat-treated Al7075 alloy hybrid composites were evaluated for their hardness, tensile, and wear behavior, showcasing a significant process innovation. The heat treatment process greatly improved the hybrid composites’ mechanical and wear performance. The samples quenched in ice attained the highest hardness of 119 VHN. There is a 45.37% improvement in the hardness of base alloy with the addition of 3% of Al2O3 and 1% of graphite particles. Further, the highest tensile and compression strengths were found in the ice-quenched 3% Al2O3 and 1% graphite hybrid composites with improvements of 34.2 and 48.83%, respectively, compared to the water-quenched base alloy. Under the samples quenched in ice, the mechanical and wear behavior improved. The tensile fractured surface showed voids, particle pullouts, and dimples. The worn-out surface of wear test samples of the created hybrid composite had micro pits, delamination layers, and microcracks.
M. S. Raksha, Adaveesh Basavalingappa, Madeva Nagaral, Chandrashekar Anjinappa, B. Omprakash, Abdul Razak, and Nasim Hasan
Wiley
AbstractMicron‐sized graphite particles additions to Al2011 alloy were investigated to know their impact on mechanical properties. The stir cast method was used to manufacture the Al2011 alloy with 2 and 4 wt% of graphite particles reinforced composites. The microstructural analysis and mechanical properties of the synthesized composites were tested. Scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) spectrums were used to characterize the microstructure of the samples that were obtained from the casting. SEM micrographs indicated the homogeneous distribution of particles and the EDS patterns confirmed the presence of graphite particles. Al2011 alloy hardness was decreased with the addition of graphite particles. Further, with the addition of 2 and 4 wt% of graphite particles in the Al2011 alloy, the ultimate tensile and yield strengths of composites were increased with increase in elongation. SEM micrographs of tensile fractured surfaces were used to study the various fractured behaviors in the Al2011 alloy‐graphite composites.
Veeranna Modi, Prasad B. Rampure, Atul Babbar, Raman Kumar, Madeva Nagaral, Abhijit Bhowmik, Raman Kumar, Shatrudhan Pandey, S.M. Mozammil Hasnain, Muhammad Mahmood Ali,et al.
Elsevier BV
Kumar M Hemanth, , R. Saravanan, Madeva Nagaral, Samuel Dayanand, V. Auradi, , , , and
MIM Research Group
In the current studies microstructure and mechanical behavior of Al7085 metal alloy with 4 and 8 wt. % of B4C composites. Liquid metallurgy method was used to create composites of Al7085 alloy with 4 and 8 weight percent of B4C particles. Microstructural analysis by SEM/EDS was performed on the prepared composites. Furthermore, ASTM E8 and E10 standards were used to examine the tensile and hardness properties of Al7475 alloy reinforced with B4C composites. The SEM analysis revealed that the particles were uniformly dispersed throughout the base alloy. EDS spectrums confirmed the reinforcement particles presence in the Al7085 alloy in the form of boron and carbon elements. Moreover, the incorporation of B4C particles into Al7085 alloy has enhanced the material's mechanical behavior. The hardness and tensile strength of Al7085 alloy was improved 27.59% and 35.91% respectively with the combination of boron carbide particles. After boron carbide particles were added to Al7085, the alloy lost some of its ductility and density. The prepared composites were then subjected to tensile fractured surfaces to investigate ductile and brittle modes of fracture.
Revanna Kambaiah, Ramappa Suresh, Madeva Nagaral, Virupaxi Auradi, Chandrashekar Anjinappa, Komal Garse, Amar Pradeep Pandhare, and Anteneh Wogasso Wodajo
Wiley
AbstractIn the present work, hybrid composites made of Al2214 alloy with B4C and graphite were produced by using a liquid metallurgical process. Al2214 alloy was utilized to create hybrid composites that had 1.5–6 wt% of B4C particles and a constant 3 wt% of graphite particles. Microstructural analysis using scanning electron microscope (SEM), energy dispersion spectroscopy (EDS), and X‐ray diffraction (XRD) was done on the produced composites. The density, hardness, ultimate, yield strength, and elongation as a percentage were carried out using ASTM E8 for tensile and E10 standard for hardness test. The wear behavior of Al2214‐B4C and graphite composites was examined as per ASTM G99 standard using a wear testing device under a variety of loads and rotation speeds. Graphite and boron carbide particles were equally dispersed throughout the Al2214 alloy, according to SEM photographs. Graphite and B4C particles were detected in the Al2214 alloy by EDS and XRD analyses. The density of Al alloy composites was decreased by adding dual particles to the matrix. The Al2214 alloy's hardness, ultimate strength, yield strength, and wear resistance were all enhanced by the inclusion of dual particles, which increased these properties by 15.4%, 40.4%, and 46.7%, respectively. The presence of hybrid particles in the Al2214 alloy was revealed by EDS and XRD patterns. The density of Al alloy composites was decreased by adding dual particles to the matrix. Tensile force micrographs provided further evidence of the unique fracture behaviors shown by the Al2214 alloy and its composites. In order to examine the wear mechanisms and different morphologies of worn surfaces, scanning electron micrographs were taken.
Ananthakrishna Somayaji, Madeva Nagaral, Chandrashekar Anjinappa, Meshel Q. Alkahtani, Ravikiran Kamath Billady, Nithin Kumar, Virupaxi Auradi, Saiful Islam, J. Ranga Raya Chowdary, Abdul Razak,et al.
American Chemical Society (ACS)
In the current study, a two-stage stir cast process was used to produce Al6082 reinforced with sized graphite particulates, and the material’s mechanical and tribological properties were analyzed. The graphite content in the Al6082 alloy was increased from 2 to 6% in steps of 2 wt %. The impact of graphite addition to Al6082 was evaluated using microstructural micrographs, hardness test, tensile test, and wear test outcomes. The matrix alloy’s microstructure and particle distribution were analyzed using scanning electron microscopy and energy-dispersive spectroscopy. The microstructure of Al6082 shows that the reinforcement particles are evenly distributed throughout the matrix. Although the hardness of metal–matrix composites was slightly reduced when graphite was added at concentrations of up to 6 wt %, the material’s tensile strength and wear resistance were significantly improved. Micrographs taken by a microscope were used to examine the fractured surfaces of tensile test specimens. Wear experiments were performed using a conventional pin-on-disc tribometer to examine the tribological properties of both unreinforced matrix and graphite composites. With the addition of 2, 4, and 6 wt % of graphite particles, the composites’ wear resistance was significantly improved. Wear of alloys and their composites was analyzed to determine how load and sliding speed impacted wear loss.
Manjunath Vatnalmath, Virupaxi Auradi, Varun Kumar M J, Bharath Vedashantha Murthy, Madeva Nagaral, A. Anbarasa Pandian, Saiful Islam, Mohammad Shahiq Khan, Chandrashekar Anjinappa, and Abdul Razak
American Chemical Society (ACS)
The present study aims at producing transient liquid phase (TLP) bonded Al2219 joints with pure Cu (copper) as an interlayer. The TLP bonding is carried out at the bonding temperatures in the range of 480 to 520 °C while keeping the bonding pressure (2 MPa) and time (30 min.) constant. Reaction layers are formed at the Al-Cu interface with a significant increase in diffusion depth with the increase in the bonding temperature. The microstructural investigations are carried out using scanning electron microscopy and energy-dispersive spectroscopy. X-ray diffraction study confirms the formation of CuAl2, CuAl, and Cu9Al4 intermetallic compounds across the interface of the bonded specimens. An increase in microhardness is observed across the bonding zone with the increase in the bonding temperature, and a maximum hardness value of 723 Hv is obtained on the diffusion zone of the specimen bonded at 520 °C. Furthermore, the fractography study of the bonded specimens is carried out, and a maximum shear strength of 18.75 MPa is observed on the joints produced at 520 °C.
S.B. Angadi, M. Nagaral, V. Pilankar, P. Yarnalkar, B. Purohit, and S. Shewale
MAFTREE
Due to the superior qualities nowadays, composite materials are already replacing conventional materials as constituents. The incorporation of micro particles brings about an innovation in the material world. Micro particles also affect manufacturing and mechanical characteristics. In the current study, three different types of samples are fabricated by stir casting method by reinforcing the 0% wt., 2.5% wt. and 5% wt. of boron carbide (B4C) micro particles in aluminium alloy (Al2011) matrix. Finally, mechanical and microstructural properties are evaluated by conducting tensile, compression and hardness tests on fabricated samples. The study revealed that by the addition of 2.5% wt. and 5% wt. of B4C micro particles to Al2011 alloy then on comparing to the pure Al2011 alloy, the mechanical properties of the matrix with the Al2011 particles are improved. Additionally, the findings of the experiments demonstrate that the addition of B4C micro particles reduces the ductility of the composites. Furthermore, micrography analysis by SEM and FEA analysis has been carried out on the developed composites, SEM analysis shows that uniform a distribution of B4C particles in the Al2011 matrix. Also, FEA analysis revealed that there is closeness amongst FEA results and analytical results.
M. S. Raksha, Adaveesh B, Madeva Nagaral, Satish Babu Boppana, Chandrashekar Anjinappa, Mohammad Shahiq Khan, Mohammed Osman Abdul Wahab, Saiful Islam, Vivek Bhardwaj, Rohini Kumar Palavalasa,et al.
American Chemical Society (ACS)
Micron-sized B4C addition to the Al2011 alloy was investigated for its impact on mechanical and wear performance. The stir-casting method was used to manufacture the Al2011 alloy metal matrix composites reinforced with varying percentages of B4C particulates (2, 4, and 6). The microstructural, mechanical, and wear properties of the synthesized composites were tested. scanning electronic microscope (SEM) microscopy and XRD patterns were used to characterize the microstructure of the samples that were obtained. The XRD patterns confirmed the presence of B4C particles. The addition of B4C reinforcement increased the metal composite’s hardness, tensile strength, and compressive strength. Incorporating the reinforcement resulted in a decrease in elongation for the Al2011 alloy composite. The wear behavior of the prepared samples was examined under various load and speed conditions. In terms of wear resistance, the microcomposites were far superior. SEM observations of the Al2011–B4C composites revealed numerous fracture and wear mechanisms.
Zeeshan Ali, , V Muthuraman, P Rathnakumar, P Gurusamy, Madeva Nagaral, , , , and
MIM Research Group
Bharath Vedashantha Murthy, Virupaxi Auradi, Madeva Nagaral, Manjunath Vatnalmath, Nagaraj Namdev, Chandrashekar Anjinappa, Shanawaz Patil, Abdul Razak, Abdullah H. Alsabhan, Shamshad Alam,et al.
American Chemical Society (ACS)
Manjunath Vatnalmath, C.R. Raghavendra, V. Auradi, V. Bharath, N. Nagaraj, and Madeva Nagaral
MAFTREE
Recent advancements in the field of coating have shown that the Ni-Al2O3 electrodeposited coatings are of excellent wear-resistant, corrosion-resistant. In this study, Ni-Al2O3 composite coating is produced by electrodeposition process by using standard watts bath due to the advantage over other coating techniques. Al2O3 nanoparticles are co-deposited on AA6061 with Nickel. There are many parameters that influence the coating characteristics, however, in this study temperature, current density and percentage of nanoparticle loading are considered as significant parameters. Optimization of the coating parameters is examined by using the Taguchi method. The coating morphology and microstructure are studied using Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). The dry sliding wear behaviour of composite coatings is tested on a pin-on-disc wear test rig.
M. D. Kiran, H K Govindaraju, Nithin Kumar, Madeva Nagaral, Dhananjay Vasant Khankal, Amar Pradeep Pandhare, E. R. Babu, Chandrashekar Anjinappa, Abdul Razak, and Anteneh Wogasso Wodajo
Wiley
AbstractIn present research the fracture behavior of carbon fabric‐epoxy composites (CE composites) was evaluated with the addition of 0.1, 0.2, 0.5, and 0.75 weight percentages of carbon nano tubes (CNTs) at different temperatures. The CE composites with different wt.% of CNT were fabricated using land layup method and cured by hot pressing. The fracture toughness of fabricated composites was evaluated in mode–I condition at different temperature. From the results it was shown that the highest fracture toughness was observed at 0.75 wt.% of reinforcement of CNT functional fillers. The fracture toughness of 0.75 wt.% CNT filled CE composites was increased by 19.73% compared to unfilled CE composites. The fracture toughness of CNT filled CE composites diminishes with increase in temperature and the composite filled with 0.75 wt.% CNT exhibits better fracture toughness than the unfilled CE composite at all the temperatures. The fracture toughness was improved by 57.76% and 71.65% at 40 and 60°C, respectively, at 0.75 wt.% reinforcement of CNT fillers. The fractured surfaces of composites were analyzed using Scanning Electron Microscope (SEM) to study the filler contribution to enhance the fracture toughness and failure mechanism of composites.
T V Vineeth Kumar, , N Shanmugapriya, Arun S, Madeva Nagaral, , , and
MIM Research Group
Kotresha Mydur, Mahendra Kumar S., Madeva Nagaral, Virupaxi Auradi, Bharath V., and Sudarshan T.A.
EDP Sciences
In the present study looked into how incorporating B4C particles with a size range of 20–25 microns would affect the mechanical, wear and physical properties of composites made from Al7010 alloy. The stir cast method accounted for of the total production of B4C composites. Different mechanical properties, such as hardness, tensile behaviour, wear and density, were measured and analysed for these synthetic composites. Microstructure was characterised by scanning electron microscopy and X-ray diffraction analysis to determine the distribution and phases of particles smaller than a micron. Wear tests were conducted on all the samples at varying loads and speeds. Hardness and tensile strength of Al7010 alloy were improved by adding B4C particles sized 20–25 microns, with only a minor decrease in elongation. Further, as B4C particles accumulated, the density of the Al7010 alloy decreased. SEM examination revealed a wide range of fracture behaviours upon tensile stress. Load and sliding speeds affected the wear behaviour of Al7010 alloy and its composites.
Manjunath Vatnalmath, V. Auradi, V. Bharath, Madeva Nagaral, N. Nagaraj, and A. Haiter Lenin
Hindawi Limited
Solid-state diffusion bonding of AA2219 alloy is carried out under the nonvacuum condition to form AA2219/AA2219 joints. In the currently adopted method, AA2219 alloys are joined under the bonding temperature of 450–500°C, bonding pressure of 10 MPa, and bonding time of 30 min. Chemical cleaning is adopted to protect the joining surfaces from reoxidation before the diffusion bonding process. Microstructure evolution at the bonded joints is characterized using optical microscopy, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The hardness at the bonded joints increased with the increase in the bonding temperature. The parent metal structure is achieved at 500°C bonding temperature with an increase in hardness of 112.14 Hv at the bond interface. There is no evidence of intermetallic found at the interface, as confirmed by X-ray diffraction (XRD).
Nithin Kumar, H. S. Vasanth Kumar, T. Hemanth Raju, Madeva Nagaral, V. Auradi, and R. K. Veeresha
Springer Science and Business Media LLC
H.S. Vasanthkumar, U.N. Kempaiah, Madeva Nagaral, and K. Revanna
MAFTREE
Al6061 alloy with 80-to-90-micron sized B4C reinforced metal composites were synthesized using two steps stir cast process. The developed composites were characterized for microstructural characterization with SEM/EDS and XRD. Al6061 alloy with 9% wt. of B4C reinforced composites were shown uniform particles distribution in Al matrix. Furthermore, EDS and XRD patterns confirmed the availability of these reinforced particles in the metal composites. Hardness, tensile, compression, impact and fatigue tests were done to discover the effect of adding B4C to the base alloy on the mechanical properties of the composites. The first four strengths as above were discovered to be more with the addition of B4C particles. There was a slight decline in the fatigue life and elongation of Al6061-B4C composites when compared with the base alloy.
Mahadeva Reddy, B. Adaveesh, and Madeva Nagaral
MAFTREE
Polymer Matrix Composites (PMCs) are composed of a variety of continuous or short fibres with organic based polymer matrices. In PMCs, the reinforcement gives stiffness and high strength. The role of matrix material is to tie the fibres together and to transfer load between them. In this research epoxy (LY 556), with hardener (HY 0951) are reinforced with the Pine Apple Leaf Fibre (PALF), graphite powder and Silicon Carbide (SiC) using traditional hand lay-up technique. The attempt is made to evaluate the influence of SiC and PALF on the tribological behaviour. Results show that SiC particulate hybrid composites show higher wear resistance compared to all tested composites. PALF and graphite reinforcement provides a cushioning effect and solid lubrication to the composites that lead to higher wear resistance.
G. Veeresha, B. Manjunatha, V. Bharath, Madeva Nagaral, and Virupaxi Auradi
Gruppo Italiano Frattura
In the current studies an investigations were made to know the effect of 63 micron sized B4C particles addition on the mechanical and wear behavior of aerospace alloy Al2618 metal composites. Al2618 alloy with different weight percentages (2, 4, 6 and 8 wt. %) of 63 micron sized B4C particles reinforced composites were produced by stir cast process. These synthesized composites were tested for various mechanical properties like hardness, compression strength and tensile behavior along with density measurements. Further, microstructural characterization was carried by SEM/EDS and XRD analysis to know the micron sized particles distribution and phases. Wear behavior of Al2618 alloy with 2 to 8 wt. % of B4C composites were studied as per ASTM G99 standards with varying loads and sliding speeds. By adding 63 micron sized B4C particles hardness, compression and tensile strength of Al2618 alloy was enriched with slight decrease in elongation. Further, wear resistance of Al2618 alloy was enriched with the accumulation of B4C particles. As load and speed on the specimen increased, there was increase in wear of Al2618 alloy and its composites. Various tensile fracture surface morphology and worn surface behavior was observed by SEM analysis.
Kotresha Mydur, S. Mahendra Kumar, Madeva Nagaral, V. Bharath, and V. Auradi
Informatics Publishing Limited
In the current studies an investigations were made to know the effect of 20 to 25 micron sized B4C particles addition on the physical and mechanical behaviour of Al7010 alloy metal composites. Al7010 alloy with 4 and 8 wt.% of B4C composites were produced by stir cast process. These synthesized composites were tested for numerous mechanical properties like hardness and tensile behaviour along with density measurements. Further, microstructural characterization was carried by SEM and XRD analysis to know the micron sized particles distribution and phases. By adding 20 to 25 micron sized B4C particles hardness and tensile strength of Al7010 alloy was enriched with slight decrease in elongation. Further, density of Al7010 alloy was decreased with the accumulation of B4C particles. Various tensile fracture behaviours were observed by SEM analysis.