Siddesh Kumar N M
@siddu
Research Scholar
EDUCATION
M Tech in Manufacturing Engineering and Technology at Manipal Institute of Technology
B E in Mechanical Engineering at The National Institute of Engineering
RESEARCH, TEACHING, or OTHER INTERESTS
Multidisciplinary, Mechanical Engineering, Materials Science, Agricultural and Biological Sciences
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
N.M. Siddesh Kumar, B.M. Promod Kumar, Bheem Kumar Haloor, Pranadhi Haran, K.S. Manoj Gowda, and S.S. Hemashree
CRC Press
B.M. Promod Kumar, K.S. Manoj Gowda, S.S. Heemashree, N.M. Siddesh Kumar, S. Tejas, Pranadhi Haran, and C.M. Vikas
CRC Press
N. M. Siddesh Kumar
Springer Science and Business Media LLC
N. M. Siddesh Kumar, T. N. Shashank, N. U. Dheeraj, Dhruthi, Amir Kordijazi, Pradeep K. Rohatgi, and M. Sadashiva
Springer Science and Business Media LLC
H. R. Lakshmi Narasimha Murthy, Ramesh Kurbet, N. M. Siddesh Kumar, K. Jashwanth, and P. Bhargav
AIP Publishing
Siddesh Kumar N. M., Mohammad Rafi. H. Kerur, Nouman Khan, and Shashank T. N.
AIP Publishing
Siddesh Kumar N M, Chethan S, Talluri Nikhil, and Dhruthi
IOP Publishing
Abstract An enormous amount of research has been conducted on aluminium alloys in friction stir processing (FSP), despite magnesium alloys reporting severe weight reduction when compared to aluminium alloys; a very slight amount of research has testified for FSP of magnesium alloys. Magnesium is highly reactive and susceptible to corrosion in the presence of an aggressive environment. This highly corrosive nature of magnesium limits its applications. Surface properties like crystal structure, composition, and microstructure influence the corrosion and wear properties of the material. Coating techniques and alloying techniques like laser surface modifications are performed to passivate the magnesium surface from corrosion. Coating techniques, however, have been found to be insufficient in corrosion protection due to coating defects like pores, cracks, etc, adhesion problems due to poor surface preparation of the substrate, and impurities present in the coating which provide microgalvanic cells for corrosion. The current study gives a detailed overview of different types of surface modification methods, such as physical vapour deposition, chemical vapour deposition, chemical conversion coating, and ion implantation coating techniques, and also focuses on a few alloying or surface processing methods, such as laser surface modification – namely laser surface melting, laser surface cladding, laser shot peening, laser surface alloying and FSP. FSP is a novel surface modification method derived from friction stir welding, which modifies the microstructure and composition of surface layer without changing the bulk properties to enhance corrosion resistance. FSP enhances and homogenizes the microstructure but also eliminates the breakup of the brittle-network phases and cast microstructure imperfections. Indeed, FSP can produce particle and fibre-reinforced magnesium-based surface composites. FSP empowers the manufacturing of magnesium by adding additives. The different methods of coating and surface modification are compared with FSP.
M. Sadashiva, N.M. Siddeshkumar, J. Monica, M.R. Srinivasa, N. Santhosh, and S. Praveenkumar
MAFTREE
Aluminium and its alloys have an excellent mechanical property in that metal matrix composite has a promising role in the field of automobile and aviation. This work aims to investigate the hardness and impact strength of aluminium Al2024, Al6061 and Al7075 alloy reinforced with a weight fraction of fine greenish silicon carbide 7% and chopped E-glass fiber 3%. The metal matrix composite plates were welded by using the friction stir welding process at 550, 850 and 1150 rpm with a feed rate of 40, 80, 120 mm/min. Hardness specimens are prepared as per ASTM-E-92 and investigated the hardness of welded and unwelded (base metals and composite metal) in nugget zone, HAZ and TMAZ with the help of Vickers hardness test machine. Impact strength specimens are prepared as per ASTM-E-23. The results were compared with welded and unwelded aluminium specimens.
N.M. Siddesh Kumar, Dhruthi, G.K. Pramod, P. Samrat, and M. Sadashiva
Elsevier BV
N. M. Siddesh Kumar, T. N. Shashank, Nouman Khan, K. J. Mahendra Babu, and S. L. Ajit Prasad
Springer Science and Business Media LLC
Spur gears are used to transmit power and motion from one shaft to another shaft when the shafts are parallel. While running, gear drives are subjected to variable speed and load. Imperfection in the gears leads to an increase in the sound level and vibration level. The imperfections which cause the vibration are eccentricity, pitting, broken gear tooth, and crack. The best design practice of spur gear leads to a decrease in the vibration level in the gear drive. In the present work 20MnCr5 alloy steel is considered as gear and pinion material. Two different gears are modelled using Solid Works one is healthy gear and another is single tooth broken gear then it is analysed for modal response and harmonic response at three different torque values. The results show that natural frequency is higher at 6th mode and the corresponding mode shape is torsion and bending. Deformation and stress amplitude at Y-axis is more with a high amplitude of vibration. Also, total deformation is supreme in single tooth broken gear at the torque of 58875 N-mm.
N.M. Siddesh Kumar, M. Sadashiva, J. Monica, and S. Praveen Kumar
Elsevier BV
N M Siddesh Kumar, T. Shashank and Dhruthi
Gowri Shankar M. C et al., Gowri Shankar M. C et al., and
Transstellar Journal Publications and Research Consultancy Private Limited
In the present investigation, an attempt is made to fabricate the Duralumin(DA) based Silicon Carbide (SiCp-6
and 12% wt.) reinforced composite by cold compacting the ball milled powders. The mechanically mixed powders taken
into the die cavity are applied with a steady axial load in the range 22-30 T to produce the cylindrical compacts.
The compacts are further subjected to sintering by holding it at a constant temperature of 5800C in Muffle furnace for 5 h and allowed to cool in the same for 18 h. The hardness of sintered composite is found to have improved as compared to the sintered duralumin compact prepared under similar process conditions. The SEM images showed the uniform
distribution of the reinforcements in the matrix and the elemental composition is confirmed by the EDAX spectrum.
The sintered specimens were further subjected to age hardening heat treatment. Specimens were soaked at 5500C for 2 h followed by water quenching at room temperature. The quenched specimens were artificially aged in the furnace at temperatures of 100, 150, and 2000C for various durations of time. The peak hardness obtained because of aging heat treatment is found to be much better than the corresponding sintered compacts. Compacts peak aged at 1000C exhibited better tensile strength than the other category of specimens. The composites developed in the present study would be most suitable in the applications requiring high strength and resistance to heat and wear.
Y. M. Shivaprakash et al., Y. M. Shivaprakash et al., and
Transstellar Journal Publications and Research Consultancy Private Limited
In the present study Duralumin(DA) based Mild Steel particles (MSp-6% wt. and 12% wt.) reinforced composite
are fabricated by cold compacting the milled powders. The mechanically mixed powders are compacted in a die cavity by
applying a uniaxial steady load in the range 22-38 T. The hardness of green compacts produced are increased by
sintering. The SEM images showed an even dispersion of MSp in the duralumin alloy and elemental composition is
confirmed by the EDAX spectrum. The sintered specimens were further subjected to aging treatment. Compacts were
soaked at 5500C for a span of 2 h and then are quenched in water at ambient temperature. The temperatures selected for
aging treatment are 100, 150, and 2000C and hardness was checked for every 60 minutes of time. The peak hardness
obtained because of aging heat treatment is found to be much better than the corresponding sintered compacts. Compacts peak aged at 1000C exhibited better tensile strength than the rest of the other specimens