C. Siddaraju

• Professor (Assistant) at Ramaiah Institute of Technology

Low-carbon steel's characteristics are mostly dictated by critical cooling rate, recrystallization temperature, and cooling medium. Higher cooling temperatures increase the possibility of coarse grain development in the martensite structure. Lower cooling rates, on the other hand, encourage the development of tiny grains inside a martensite and pea...

Leading edge erosion (LEE), which often begins near the blade’s tip, is one of the most important degradation processes that affect gas turbine blade. Optimizing blade maintenance and choosing the best leading edge protection (LEP) system involve a thorough understanding of the leading edge erosion (LEE) process and the effects of damaged LEs on ae...

In this research paper, thin films of polyethersulfone reinforced with different concentrations of the zinc-nickel ferrite nanoparticles [ZnNiFe] using the spin coating technique is presented and briefly discussed. The polymer chosen was polyethersulfone. Optical characterization of the test samples was carried out using different spectroscopic tec...

This project aims to investigate and compare the tribological properties of copper-based alloys produced by the die-casting method. Tribological properties, such as wear resistance and frictional behavior, play a crucial role in determining the suitability of materials for various engineering applications. Copper has many useful properties, such as...

The primary objective of this research is to analyse the synergistic impact of incorporating nanocopper particles (nCu) into carbon fibre-reinforced epoxy composites, aiming to enhance wear resistance. Additionally, the study seeks to develop an artificial neural network (ANN) model for predictive analysis. The fabrication process involves crafting...

Mg alloys are emerging as potential and very promising alternatives for replacing permanent metallic implant materials such as steels and titanium in applications where the implants need to be removed following healing through revision surgery. Use of Mg alloys for implant application is seen as a game changer and Mg alloys are almost perfect mater...

Aluminum alloys are widely used engineering materials in a various field. AA2024 alloy is one of the most used alloys in the aerospace as well as automobile industry. At the time of the casting of the alloy, casting defects like porosity, shrinkage, etc. are induced in the alloy. The casting defects can be minimized by optimizing the gating system...

Thin films of the polymer, polyvinylpyloridate, reinforced with zinc-nickel ferrite nanoparticles (Zn0.5Ni0.5Fe2O4) and prepared using the technique of spin coating is the central theme of presentation and discussion in this research paper. The zinc-nickel ferrite nanoparticles were used to reinforce a thin film of the chosen polymer and for varyin...

p>Metal matrix composite plays an important role in automobile and aerospace applications. Among all the metals, aluminium is considered as the lighter metal. In present investigation aluminium-2024 is considered as the base alloy and reinforced with boron carbide to increase its hardness. Aluminium metal matrix composite is obtained by combining d...

p>Smart grid is a network created through information technology, communication technology and electrical power systems. It is simply a “smarter” power grid which ensures a two-way communication between user and the power supplier. This work proposes a smart microgrid design hybrid renewable energy system based on solar, grid and wind energy resour...

The steel alloys tubes used to manufacture boilers which are used in high temperature environment in thermal power plants are often subjected to high temperature corrosion. Therefore, to protect the surface of boiler tubes, protective coatings are used to counter the corrosion. In this work FeCrNiC and FeCrNiC/Cenosphere coatings deposited on T22 b...

The Al6061-ZrB 2 metal matrix composites were prepared by stir-casting approach via in-situ reaction, using aluminium master alloys comprising 3% Boron and 10% Zirconium. Developed in-situ composites were rolled at a temperature of 400 • C. Both the as-cast and hot-rolled alloys and their in-situ composites were studied for microstructure, friction...

The present investigation deals to improve the solid-particle erosion resistance of boiler steel material. FeCrNiC and FeCrNiC with 5, 10 and 15wt.% cenosphere composite coatings were deposited on A387 Grade 22 steel using plasma spray technique. Powder and as-sprayed coatings are characterized using Scanning Electron Microscope (SEM), X-ray diffra...

Aluminum metal matrix composites with improved mechanical and chemical properties are used widely in automotive, aerospace, electrical, structural applications due to their high strength to weight ratio, fatigue resistance, and good electrical conductivity. This paper summarizes the effects of reinforcements such as SiC and CNT in the aluminium mat...

A commercial ZE41 Mg alloy was processed by equal channel angular pressing (ECAP) using route BC (90o sample rotation after each pass) and route C (180o sample rotation after each pass) at 250, 300 and 350 oC for up to 4 passes. Significant grain refinement from ∼150 μm to ∼33 μm occurred at the higher third and fourth ECAP passes. The most effecti...

As cast Al-Mg-Si alloy was hot-rolled at a temperature of 400 ° C. After rolling, the alloy was subjected to T6 heat treatment by solutionising at 530 ° C for 2 hours followed by quenching in water media. Heat-treated rolled Al-Mg-Si alloy was subjected to microstructural studies, microhardness test and tensile properties (In rolling direction, 45...

This study highlights the influence of carbon nanotubes (CNT) and silicon carbide (SiC) particles on microstructure, nanohardness and tribological behavior of copper nanocomposites. All the samples were fabricated via conventional powder metallurgy process involving high-energy ball milling, consolidation, sintering and hot forging. Microstructure...

High-temperature wear and friction properties of ZE41 alloy were evaluated using a pin on disc tribometer. The microstructure of the alloy has the equiaxed grains of 72±20µm decorated with the rare earth rich precipitates. Result shows that wear rate decreases upto 100°C and then increases until 250°C for all the loading conditions. The wear mechan...

The Mg-Zn-Gd-Zr alloy is one of the important aerospace alloys in the aircraft gearbox applications. The complex geometry of the gearbox introduces several stress concentration points with various intensities. These regions are susceptible to catastrophic failure under mixed loading condition. Therefore, it is important to understand the deformatio...

In India, imparting practical knowledge about industrial automation to engineering students is still in its infancy. Technical facilities are available only at a few engineering colleges. As a result, it is necessary to share these facilities. One efficient way of doing this is through a remotely operated laboratory, where equipment related to auto...

This paper explains the evaluation of erosion profiles in metal mesh supported SCR plate catalyst structures in which the glass fibers concentration in the catalyst material is considered as prime factor for erosion resistance and mechanical strength. The samples are prepared and tested at the specified and constant conditions like velocity as 30m/...

The objective of this research is to evaluate certain specific mechanical properties of certain stainless steel wire mesh supported Selective catalytic reduction catalysts structures wherein the physical properties of the metal wire mesh and also its surface treatments played vital role thereby influencing the mechanical properties. As the adhesion...

Erosive wear is caused by the action of sliding or impact of solids, liquids, gases or the combination of these. Solid particle erosion is an important material degradation mechanism encountered in a number of engineering systems such as gas turbine engines, thermal power plants, coal slurry pipe lines. Erosive action results from the impact of par...

Nano composites have been attracted the materials community since last decade and a lot of emerging technologies have been developed to refine the grain size to nano and submicron level. Metal matrix composites are promising materials for number of applications in the field of aerospace, defence and automobile industries for their good strength and...

The effect of thermal exposure on the mechanical properties of a C355.0 aerospace grade aluminum-silicon alloy (5% Si - 1.2% Cu - 0.5% Mg) was investigated in the present study. The alloy specimens were subjected to T6 (solution treatment and artificial ageing treatment) temper treatment to enhance the strength properties through precipitation hard...

Equal channel angular pressing (ECAP) is an effective metal forming method to produce an ultra-fine grained structure in the metal. In the present paper sever plastic deformation (SPD) of aluminium 6% titanium boride is deformed through ECAP at a temperature of 200°C up to 4 passes by using route B c where samples is rotated by 180° after each pass...

Fretting is a phenomenon occurring between two surfaces having relative oscillatory motion of small amplitude. Fretting damage occurs on the surfaces of contacting components. An accurate assessment of critical fretting variables such as contact traction, contact condition (stick & slip) and contact stresses over the blade-disc attachment is essent...

Brake pads are the most important component of an automobile braking system. It help in smooth retardation of a vehicle and finally bringing it to halt. Brake pads convert the vehicle's kinetic energy into thermal energy by friction. The effectiveness of the brakes depends completely on frictional material used, which in turn affect the performance...