K. Raju

St. Joseph Engineering College · Department of Mechanical Engineering

Nickel electroplating is known to be industrially effective for enhancing various substrate properties. In the present work, nickel coatings were developed on copper substrates by electroplating using standard nickel plating solution at various electrolyte bath temperatures ranging from 40 ± 2°C to 60 ± 2°C in steps of 10°C. Energy dispersive spect...

In the present study, nanocrystalline nickel (Ni) and nickel-chromium (Ni-Cr) alloy coatings were developed on copper (Cu) substrate using pulse current. The pulse current parameters include a cycle time of 240 milliseconds at a duty cycle of 0.5 and 4.17 Hz frequency. The surface morphology, texture, hardness, scratch resistance and porosity were...

In this chapter, a solar powered pesticide-spraying RFID robot has been designed and developed for its use in different types of fruits and vegetable fields. The robot is equipped with DC motors, DC pump, a solar panel, and an ultrasonic sensor. The robot's navigation has been automated using RFID (radio frequency identification) technology. An ult...

A new, inexpensive domestic electronic cradle that can compete with current imported, expensive models has been a long-time need. This study describes the design and implementation of a new indigenous low-cost E-Baby Cradle that swings automatically when the baby cries. The cry analyzing system recognizes the sound of a baby's cry and swings the cr...

The rapid depletion of fossil fuels and the increasing levels of exhaust gas emissions have paved the way for researchers to focus their attention on alternative fuels. One such potential alternative source of fuel is biodiesel. In the light of the search for newer fuels, the present work focuses on Vateria Indica biodiesel that is found widely in...

In this study the performance as well as emission tests were conducted on Kirloskar diesel engine (a single-cylinder 5.2 kW) using Cardanol as a bio-diesel. Cardanol was produced from cashew nut shell liquid (CNSL) blended with Honge methyl ester in addition of diesel. The bio-fuel blends 5C5H (5% cardanol + 5%Honge oil + 90% diesel),5C10H, 5C15H a...

In the present study, Equal Channel Angular Pressing (ECAP) of commercially pure aluminum (Al) in the cast form was carried out at room temperature for assessing its hardness by different routes and passes. The different routes employed in the present investigation are A, BA, BC and C. The Al specimens were pressed by a die of 150° channel angle wi...

This Paper presents the design and fabrication of an operational first prototype of the Automated Prosthetic Arm capable of autonomously determining the object and selecting the most appropriate method for grabbing the said object. Autonomy of the device is achieved through the use of a unique software/App control system which takes input from modu...

Renewable fuel such as Biodiesel has become more interesting fuel due to rising expenses of standard fossil fuels, to meet growing energy demand and an alternative to reducing oil reserves. In the compression ignition engine, biodiesel proves to be an alternative feasible option for gasoline, biodiesel burns like crude oil fuel and has controlled p...

In this research paper the effect of injection pressure is investigated on a nanofuel sample compared with its basefuel blend. Waste cooking oil methyl ester and diesel blend used are in the ratio of 20:80. Magnetite nanoparticles are dispersed in the B20 blend using a probe ultrasonicator. Basefuel B20 and nanofuel with 100 ppm of magnetite is tes...

In this study the performance and emission tests were conducted on single cylinder 4 S diesel engine using Honge biodiesel and Rice bran methyl ester (RBO) blend with diesel. Two samples of bio diesel blends 10R5H (10% RBO + 5% Honge + 85% Diesel) and 20R5H (20% RBO + 5% Honge + 75% Diesel) were prepared and tested at different injection pressures...

In the present study, the effect of embrittlement on the microstructural features, mechanical and dry sliding wear properties of AISI 2507 super duplex stainless steel (SDSS) has been discussed. Prior to heat treatment the SDSS has been solution treated. Further, SDSS has been heat treated at 475°C for 60 min and then quenched in water and oil at r...

Vateria Indica is a multipurpose tree that is much used locally in India. It provides food, medicine and a range of other commodities. It is often planted along avenues in India. The use of vegetable oil as feedstock for biodiesel production is divisive as an outcome of the challenges of a food-fuel catastrophe linked with the use of fit to be eate...

Vateria Indica is a multipurpose tree that is much used locally in India. It provides food, medicine and a range of other commodities. It is often planted along avenues in India. The use of vegetable oil as feedstock for biodiesel production is divisive as an outcome of the challenges of a food-fuel catastrophe linked with the use of fit to be eate...

In the present study the microstructural features and tribological characteristics of hot forged A356 Al alloy subjected to SIMA (Strain induced melt activation) and T6 heat treatment (semi-solid) processes have been investigated. The SIMA process consists of hot forging of alloy at 325˚C followed by cold forging at room temperature, isothermal hol...

In this study, an attempt has been made to produce Al–10Cu–Fe alloy by vertical centrifugal casting at speeds ranging from 800 to 2850 rpm. The microstructural features, mechanical and wear properties have been investigated. The microstructure of Al–10Cu–Fe alloy consists of equiaxed grain morphology of the primary α-phase with eutectic phases in t...

In the present study the effect of compression ratio on the performance and emission characteristics of a blend of Vateria Indica Oil Methyl Ester and neat diesel has been investigated. The oil has been extracted from the Vateria Indica seeds by Solvent method. The extracted oil has been subjected to a two step transesterification process for obtai...

In the present study the effect of alumina (Al2O3) nanoparticles (ANP) on the performance and emission characteristics of blends of Lard Oil Methyl Ester (LOME) on a CI engine has been investigated. Lard oil has been extracted from pig fat and was subjected to transesterification to obtain LOME. The blend samples (B10, B20 and B30) of LOME were use...

In this paper an attempt is made to use titanium dioxide and calcium carbonate nanoparticles as fuel additive in a C.I. Engine. Dispersion of nanoparticles in B20 methyl ester of pongamia pinnata oil is carried out using a probe sonicator. The physiochemical properties are characterized. The fuel samples are then tested in C.I. Engine test rig. Res...

The objective of this study is to evaluate the performance of HSS and Carbide drills by measuring the various drilling parameters such as thrust, torque, delamination, specific cutting pressure and surface roughness. Two micro-fillers, viz. Alumina and Graphite were used. The amount of fillers addition was 5 wt% in G-E composite. All composites wer...

Magnetorheological fluids belong to a group of smart materials. The key feature of Magnetorheological fluids is that their rheological properties will change on the application of magnetic/electric field. The ability to change from liquid to semi solid can be used to provide a good damping effect. Using this concept a cantilever beam structure has...

In the present study, bio-fuel prepared from the blends of cotton seed methyl ester (COME), sapindus mukorossi oil (SNO) and diesel has been tested on a CI engine at an injection pressure of 240 bar. Its performance and emission characteristics are studied and reported. It was found that the brake thermal efficiency of COME25SNO5 was higher than th...

In the present study, Lard oil methyl ester (LOME) has been extracted from pig fats by base-catalyzed transesterification with methanol in the presence of sodium hydroxide (NaOH) as catalyst. The effect of LOME addition to pure diesel on the performance and emission characteristics of direct injection diesel engine has been experimentally investiga...

In the present work, soap nut oil, cotton seed oil methyl ester and diesel were blended in the proportion of 10:15:75 by volume to form a bio diesel blend of B25. It has been observed that the calorific value is lower and viscosity is higher for B25 as compared to diesel. The performance and emission characteristics were studied using a variable co...

In the present study, bio-fuel prepared from the blends of cotton seed methyl ester (COME), sapindus mukorossi oil (SNO) and diesel has been tested on a CI engine at an injection pressure of 240 bar. Its performance and emission characteristics are studied and reported. It was found that the brake thermal efficiency of COME25SNO5 was higher than th...

In the present study, Lard oil methyl ester (LOME) has been extracted from pig fats by base-catalyzed transesterification with methanol in the presence of sodium hydroxide (NaOH) as catalyst. The effect of LOME addition to pure diesel on the performance and emission characteristics of direct injection diesel engine has been experimentally investiga...

In the present work, soap nut oil, cotton seed oil methyl ester and diesel were blended in the proportion of 10:15:75 by volume to form a bio diesel blend of B25. It has been observed that the calorific value is lower and viscosity is higher for B25 as compared to diesel. The performance and emission characteristics were studied using a variable co...

Magnetorheological fluids belong to a group of smart materials. The key feature of Magnetorheological fluids is that their rheological properties will change on the application of magnetic/electric field. The ability to change from liquid to semi solid can be used to provide a good damping effect. Using this concept a cantilever beam structure has...

In the present study, the effect of Sn on the dry sliding wear behavior of spray formed and hot pressed Al–17Si alloy as a function of applied load and sliding speed has been investigated and compared with that of as-cast alloy. The microstructure of spray formed Al–17Si alloy consists of fine and uniformly distributed Si particles and that of Al–1...

Abstract: In the present study the microstructural features,hardness and wear properties of spray formed Al– 35Si–4Fe alloy have been compared with that of as-cast alloy. The microstructure of spray formed Al–35Si–4Fe alloy consisted of fine and uniformly distributed Si coexisting with granular Fe containing intermetallic phase in Al-matrix. In con...

In the present study, the effect of Sn on the dry sliding wear behavior of spray formed and hot pressed Al–17Si alloy as a function of applied load and sliding speed has been investigated and compared with that of as-cast alloy. The microstructure of spray formed Al–17Si alloy consists of fine and uniformly distributed Si particles and that of Al–1...

Magnetorheological fluid is a kind of smart material belonging to the class of controllable fluids and the essential characteristic of MR Fluid is its ability to reversibly change from free flowing linear viscous liquid to semisolid having controllable yield strength in milliseconds when applied to a magnetic field. In this research work the MR Flu...

This study presents one of the approaches to investigate the performance of compression ignition engine with cotton seed and honge bio-diesel blends and diesel. Performance tests were conducted on a Kirloskar AV-1 single cylinder four stroke diesel engine. The performance of all the blends of cotton seed and honge bio-diesel were better than that o...

This study presents one of the approaches to investigate the performance of compression ignition engine with cotton seed and honge bio-diesel blends and diesel. Performance tests were conducted on a Kirloskar AV-1 single cylinder four stroke diesel engine. The performance of all the blends of cotton seed and honge bio-diesel were better than that o...

In this study an attempt is made to investigate the effect of spray forming over chill casting. The micro structures of spray formed Al–12Si and Al–20Si alloys consisted of a fine dispersion of Si particulates of size ranging from 2–10 µm in Al matrix, whereas micro structures of chill cast alloys are coarser. The hardness is higher and wear rate i...

licenses/by-nc-nd/3.0/). Selection and peer review under responsibility of the Gokaraju Rangaraju Abstract Epoxy/glass composite containing two different micro-fillers was developed by vacuum bagging technique. The effect of ceramic whisker (7.5 wt%) and solid lubricant filler (2.5 wt%) on mechanical and dry sliding wear behavior of epoxy/glass com...

This paper presents the mechanical and tribological characteristics of potassium titanate whisker (PTW) reinforced epoxy composites. The effect of various test variables and material parameters on the friction and wear behavior of epoxy/PTW composites has been studied systematically. Tribological tests were conducted on a pin-on-disc apparatus unde...

This paper presents the mechanical and tribological characteristics of potassium titanate whisker (PTW) reinforced epoxy composites. The effect of various test variables and material parameters on the friction and wear behavior of epoxy/PTW composites has been studied systematically. Tribological tests were conducted on a pin-on-disc apparatus unde...

Abstract In this study an attempt is made to investigate the effect of spray forming over chill casting. The microstructures of spray formed Al–12Si and Al–20Si alloys consisted of a fine dispersion of Si particulates of size ranging from 2–10 μm in Al matrix, whereas microstructures of chill cast alloys are coarser. The hardness is higher and wear...

In the present study the effect of copper (Cu) and iron (Fe) on the wear behavior of spray formed Al–28Si alloy has been investigated. The spray formed Al–28Si alloy exhibited equiaxed grain morphology with fine and uniform distribution of Si particles in Al matrix and spray formed Al–28Si–5Cu–4Fe alloy exhibited similar morphology with small needl...

Thispaper discusses two-body abrasive wear behaviour of Potassium Titanate Whisker (PTW) reinforced vacuum moulded epoxy/glass composites. The effects of whisker content, sliding distance, normal load and abrasive grit size on wear behaviour of composites were evaluated by pin-on-paper abrasion tests. The tests were conducted at ambient conditions...

This experimental study reports the results of adding ceramic whiskers (15wt%) and graphite flakes (2.5wt%) on mechanical and tribological characteristics of epoxy based polymer composites. Sliding wear experiments were conducted on a pin-on-disc test rig under dry contact conditions. Coefficient of friction and specific wear rate were determined a...

In the present study Al-28Si-5Cu-4Mg alloy has been spray formed and hot pressed for densification. Hot pressing refined the microstructure and reduced the porosity in the spray formed alloy from 10 to 1%. The microstructure of spray formed and hot pressed alloy exhibited equiaxed grain morphology with fine and uniform distribution of both primary...

In the present study, the effect of Cu and Mg on the wear behavior of spray formed Al-22Si alloy has been investigated and the same has been compared with that of its counterpart as-cast alloy. Al-22Si and Al–22Si–4Cu–1.7Mg alloys prepared by spray deposition process were hot pressed to reduce the porosity. The microstructures were examined by opti...

Effect of potassium titanate whiskers on the mechanical and tribological properties of glass/epoxy composite systems has been investigated experimentally. Composite laminates were prepared by hand lay-up technique followed by vacuum bagging by varying the percentage of potassium titanate whiskers addition. Mechanical properties of the developed com...

In the present work, Al–30Mg 2 Si–2Cu alloy has been spray formed and subsequently hot pressed for den- sification. The alloy is then subjected to solutionizing and isothermal aging treatments. The microstruc- tural features, hardness and wear behavior of spray formed and secondary processed alloys have been evaluated individually and compared with...

The dry sliding friction and wear behavior of epoxy hybrid composites reinforced with glass fibers and a varying amount of potassium titanate whiskers (PTWs) fabricated by vacuum hand layup method were studied. The influence of normal load, sliding velocity, and whisker content on both friction coefficient and specific wear rate was investigated on...

In the present study, Al–20Si alloy has been modified by Cu–13P master alloy to obtain Al–20Si–0.1P alloy. The wear properties of Al–20Si–0.1P alloy have been investigated and compared with that of Al–20Si alloy. The microstructure of Al–20Si–0.1P alloy consisted of primary and eutectic silicon distributed in the Al matrix. The size of primary Si i...

This study evaluates the influence of independent parameters such as sliding velocity (A), normal load (B), filler content (C), and sliding distance (D) on wear performance of potassium-titanate-whiskers (PTW) reinforced epoxy composites using a statistical approach. The PTW were reinforced in epoxy resin to prepare whisker reinforced composites of...

In the present study, the effect of microstructure on the wear characteristics of spray cast Al- 15Si and Al-20Si alloys has been investigated and compared with that of vertical axis centrifugal cast and chill cast alloys. The spray cast alloys have been subjected to Hot Isostatic Pressing for porosity reduction. HIPing has reduced the porosity in...

In the present study, the microstructural features, mechanical properties and wear characteristics of spray cast Al–12Si alloy have been investigated and compared with that of the chill cast alloy. The spray cast alloy was subjected to hot isostatic pressing for reducing the porosity of the deposit from 26% to 6%. The microstructure of the spray ca...

In the present study, the microstructural features, wear characteristics, and corrosion behaviour of spray cast Al—12Si, Al—15Si, and Al—20Si alloys have been investigated. The alloys were spray cast and hot isostatically pressed. Hot isostatic pressing has considerably reduced the porosity in spray cast alloys. The microstructure of spray cast all...

In the present investigation, the mechanical and wear properties of Al-20Si alloy processed by spray casting and vertical centrifugal casting processes have been evaluated and compared. In spray casting process the melt was gas atomized and the spray-deposited over a copper substrate. The spray-deposit exhibited considerable porosity and subjected...

In this article, the work that has been carried out in the area of spray forming of aluminum alloys and its composites has been summarized. The developments that had taken place in the past two decades in this area have been presented. Most of the researchers have investigated on the microstructural properties of these alloys and their composites....