Papers by Oluwabunmi P . Abioye
This work studied the microstructural characterization and mechanical behavior of low manganese A... more This work studied the microstructural characterization and mechanical behavior of low manganese Austempered Ductile Iron (ADI), with a view to improve the properties of iron and to increase the areas of applications. Three sets of ductile iron of specified composition were machined from Y-blocks to tensile and hardness pieces. The samples were preheated at 350 0C for 1hr and austenitised at 900 0C for 1hr in salt bath furnace. The three sets of samples were immediately austempered in the austempering salt bath furnace at uniform austempering temperatures of 300 0C, 350 0C and 400 0C for 90, 120 and 150 minutes; each sample for each temperature window. All sets were prepared for metallographic examination; tensile and hardness tests were carried out. The results showed that maximum hardness, tensile and yield strength were obtained at austempering temperature of 350 0C and at 150 minutes. At 300 0C and 350 0C, it was noticed that the hardness and strength increase with austempering t...
Prediction and control of undesirable deterioration of cutting tools are the most essential chall... more Prediction and control of undesirable deterioration of cutting tools are the most essential challenges emanating in the design of tool which has to be checked. As a result of an increase in wear rate of HSS cutting tools, so has the need for wear resistant. The result has been a progression of carburizing the tools for better performance. Based on the theoretical analysis and study of tool wear and parameters that mitigates against wear resistance of cutting tools, this research work presents an experimental investigation and analysis of the wear properties of carburized HSS cutting tools. Twelve Samples under consideration were carburized HSS (ASTM A600) tools (0.65% C) treated at 800,850,900 and 950oC with holding time of 60, 90 and 120 minutes respectively. The wear properties of weight loss, wear volume, wear resistance and wear rate were carried out using Rotopol –V, impact tester, polisher, grinder and weight scale. It was found from the experiment carried out that cutting too...
This work investigated the effect of ZnO-Citrus sinensis nano-additive on the electrokinetic depo... more This work investigated the effect of ZnO-Citrus sinensis nano-additive on the electrokinetic deposition of Zinc on mild steel in acid chloride. Fifty-four plates of (100 × 10 × 3) mm3 mild steel samples were cut, cleaned with dilute H2SO4 solution, rinsed in water and dried. The nano-additive was produced by infusing 30 ml Orange Juice extract in Zinc Oxide solution. The acid chloride electrolyte consisting of 71 g ZnCl, 207 g KCl and 35 g H3BO3 in 1 l of distilled water was divided into six portions. The nano-additive with different molar concentrations 0(0.2)1.0 was added to each portion of the acid chloride. Nine plates of mild steel samples were electroplated with zinc as the anode in each of the six prepared electrolyte solution and plated at different times (three plates each at 10, 15 and 20 min). The effects of electroplating on the average weights were measured and the results from the experiment showed the optimal nano-additive concentration and electroplating time.
The study of the simulation of effect of outer die angle in Equal Channel Angular Extrusion (ECAE... more The study of the simulation of effect of outer die angle in Equal Channel Angular Extrusion (ECAE) process was investigated. The simulation was carried out on 6063 aluminium alloy with a view to achieve ultra-fine grain structures. ADINA user interphase Version 8.6 (900 modes) was used for the simulation. The unextruded parameters of the 6063 aluminium alloy were used as input codes and some basic assumptions were made in designing the model on 2-Dimensional scale. The billet was meshed by dividing the vertical and horizontal geometry into 30 and 4 elements respectively. The die angle was varied from 0o to 90o and the simulation results were displayed. The results showed that the force of 27.5X106 N, 27.5X106 N, 27.6X106 N and 31.2 X106 N was required to deform when the outer die angle was 0o , 22.5o , 45o and 90o respectively. Also, the strains achieved were 0.61, 0.62, 0.66 and 0.69 respectively. Thus, highest force is required at 90o and the strain achieved at 0o is the lowest. B...
This research project investigates in-tricycle exposure to carbon monoxide emission on roads in N... more This research project investigates in-tricycle exposure to carbon monoxide emission on roads in Nigerian urban centres. Pollution was discussed with air pollution as priority, carbon monoxide a criteria air pollutant was used as case study. The minor and adverse effects of carbon monoxide exposure were buttressed, including its sources, majorly from incomplete combustion of fuel in automobile. This research displays a basic audit of overall research work led to portray CO exposure inside tricycles. Specific sampling roads were selected in urban areas, majorly areas with high traffic congestion, measurement methods for field testing are exhibited alongside levels of exposure of the passengers to the measured carbon monoxide. Using the results obtained from this research statistical and graphical analysis were carried out, five out of the six sampling routes were identified to have concentrations that exceed standards of environmental and regulatory bodies. Governmental and environmen...
This research work is aimed at studying the stress and strain distribution in the Equal Channel A... more This research work is aimed at studying the stress and strain distribution in the Equal Channel Angular Extrusion of Al 6063. Equal Channel Angular Extrusion (ECAE) processes enable material achieve nanoscale ultra-fine grain size without altering the physical properties. Automatic Dynamic Incremental Nonlinear Analysis (ADINA) which is a Finite Element Analysis (FEA) based solution was used to determine the stress and strain distribution in the material subjected to a single ECAE process. The model ECAE die and Al 6063 billet was developed with ADINA, the ECAE process were simulated and the data from the application was analysed. The result from the simulation showed that after a pass of ECAE of Al 6063, the average effective stress and strain were 203.08 MPa and 0.67 respectively and were highest at the inner part of the billet. Also, the average effective stress and strain were 178.02 MPa and 0.59 respectively at the mid part of the billet and the average effective stress and str...
The electrokinetic deposition of zinc on mild steel substrate under the influence of ZnO-Citrus s... more The electrokinetic deposition of zinc on mild steel substrate under the influence of ZnO-Citrus sinensis nano-additive was investigated numerically using a Finite Element (FE) solver. The conductivity of the Acid chloride plus ZnO-Citrus sinensis nano-additive electrolyte and the properties of Zinc and mild steel electrodes were used as the input codes for the model. The model was designed on a 3-dimensional scale. The boundary conditions were set and the model was meshed using the finer mesh capability in the FE solver. The model was processed and readings of the modelled zinc deposited mild steel were taken, validated and analysed so as to get the optimum parameters from the deposition process. Based on the results, the deposition mass and thickness increased with deposition time with ZnO-Citrus sinensis nano-additive, it is thus recommended that relatively high deposition time should be used in order to achieve optimum deposition.
The purpose of this study was to assess the efficacy of budget as a managerial tool for financial... more The purpose of this study was to assess the efficacy of budget as a managerial tool for financial planning and control. Concern was given to the operational framework of the budgetary control system of Beta Glass Plc. Most Small and Medium Scale Enterprises (SMSEs) in Nigeria do not plan ahead and only deal with events or issues as they occur. It therefore seems that there still exist a wide gap between what theories postulate and their application by the Nigerian businesses. One hundred and twelve copies of questionnaire were administered but only eighty-six were retrieved. Returned instruments were analyzed using simple percentage and the Pearson Product Moment Correlation Analysis. The results of the study reported that budget is an effective instrument of financial control in an organisation. Hence, every company and establishment must regularly carry out budget formulation and control.
The cost of corrosion has been increasing drastically due to the degradation of the metallic mate... more The cost of corrosion has been increasing drastically due to the degradation of the metallic materials. This study was carried out to estimate the “Cost of Corrosion of Metallic Products in Federal University of Agriculture, Abeokuta (FUNAAB)”. Questionnaires were administered and interviews were also conducted to gather necessary information. The cost of corrosion from 2013-2015 was estimated and analysed with the aid of engineering economy method and statistical analysis method. For the cost of corrosion prevention methods, cleaning gave the highest cost contribution (69%), followed by the use of oil (30%), use of grease (1%), and painting gave zero percent of the total cost. While on the cost of corrosion maintenance methods, repair gave the highest cost contributions (66%), and prevention gave (34%) of the total cost. The overall cost of corrosion from (2013-2015) gave an upward trend, but a downward trend in future value and the annualized value. While the forecast cost from (2...
Synthetic polymer materials since their inception have seen vast functionality in every disciplin... more Synthetic polymer materials since their inception have seen vast functionality in every discipline of human endeavor indicating their importance and significance in our diurnal life. These man-made macromolecular materials are petroleum-based and most conventional ones are considered to be non-biodegradable or nondegradable, and some pose arduous to salvage or recycle considering that they are materials of intricate composition having varying levels of contamination – by biological substances and food. Petroleum resources are limited, and severe environmental effects have come into being due to the ever-growing use of nonbiodegradable polymers which is a serious source of pollution affecting both fauna and flora. Furthermore, these conventional polymers, non-biodegradable polymers typically made for the long haul persist many years after disposal thus making them unsuitable for temporary use. This review focuses on biodegradable polymer alternatives as a suitable replacement for pet...
The work compared the mechanical and microstructural properties of ductile iron produced in a loc... more The work compared the mechanical and microstructural properties of ductile iron produced in a locally manufactured fuel- fired rotary furnace with ASTM A 536 65-45-12, with a view to standardizing the produced ductile iron. Sets of low alloyed ductile iron were produced in form of keel Y-block inside green sand mould, using a rotary furnace of 100 kg capacity. The base alloy was treated with 5.5 wt. % Mg-Fe-Si alloy for spheroidisation followed by post inoculation with 75 wt. % Fe-Si. The samples of the as-cast were machined to mechanical test samples of tensile, yield and hardness. The microstructural and mechanical characterizations of the samples were carried out using computerized Instron Electromechanical Testing Machine (Model 3369), Mansato Tensometer (Model W) and Nikon Eclipse metallurgical microscope, Scanning Electron Microscope (SEM) and X-ray diffraction (XRD) method. The results showed that the yield and tensile strength of the produced ductile iron were 367 and 540 MP...
Aluminium Alloys - Recent Trends in Processing, Characterization, Mechanical Behavior and Applications, Dec 21, 2017
Materials strengthened by conventional methods such as strain hardening, solute additions, precip... more Materials strengthened by conventional methods such as strain hardening, solute additions, precipitation and grain size refinement are often adopted in industrial processes. But there is limitation to the amount of deformation that these conventional methods can impact to a material. This study focused on the review of major mechanical properties of aluminum alloys in the presence of an ultrafine grain size into polycrystalline materials by subjecting the metal to an intense plastic straining through simple shear without any corresponding change in the cross-sectional dimensions of the sample. The effect of the heavy strain rate on the microstructure of aluminum alloys was in refinement of the coarse grains into ultrafine grain size by introducing a high density of dislocations and subsequently rearranging the dislocations to form an array of grain boundaries. Hence, this investigation is aimed at gathering contributions on the influence of equal channel angular extrusion toward improving the mechanical properties of the aluminum alloys through intense plastic strain.
Bioceramics Development and Applications, 2018
B io ce ramic s D e v e lo pmen t a n d A pp licatio n s
Journal of Ecological Engineering
Several studies projected that by year 2025, 4.3 billion urban residents will be generating about... more Several studies projected that by year 2025, 4.3 billion urban residents will be generating about 2.2 billion tonnes of municipal solid waste per year, over 10% of which will be plastics. The landfills in Nigeria are uncontrolled and do not conform to the international standards of similar operations elsewhere in the world; this makes the disposal of synthetic polymers in the soil even more hazardous. Due to the availability and relative inexpensiveness of Zea mays in Nigeria, this study explores the use of this natural polymer, blended with low density polyethylene (LDPE) as an alternative to synthetic plastics. Biodegradability of the biopolymer blend was observed while buried in loamy sand soil with properties similar to the soil found in the general area of the study. The results showed that a polymer blend with 50% LDPE (50 CoS) by weight had the most uniform weight loss over the period of the study. Under the soil conditions given in the study, 50 CoS also had the steadiest rate of degradation. Hence 50% LDPE (wt.%) blended with Zea mays starch is the optimal ratio with regard to the degradability of biopolymer in loamy sand soil Ota,
Journal of Physics: Conference Series
Plastics which are made from polyethylene, due to their remarkable physical properties are among ... more Plastics which are made from polyethylene, due to their remarkable physical properties are among the most widely used materials in the world today with applications ranging from agriculture to food packaging and domestic uses. However, their remarkable properties are counteracted by the fact that they are not biodegradable and result in water and land pollution which are on a steady increase annually, amongst other forms of pollution. This has consequently resulted in the development of plastics which are biodegradable and at the same time are able to compete with the generic LDPE-based plastics in terms of strength and durability. This review focuses on the various results and progressions made towards developing a biodegradable plastic from a synthetic base polymer such as Low-Density Polyethylene, Polycaprolactone or Polylactic Acid by dispersing synthesized selected nanoparticle starches into the matrix of the polymer.
Journal of Physics: Conference Series
Corrosion is a major problem in engineering because of its adverse effects involving the deterior... more Corrosion is a major problem in engineering because of its adverse effects involving the deterioration of materials as well as the destruction of such materials. Corrosion of mild steel causes excessive damage in terms of material loss and reduced efficiency. This imposes attention from researchers worldwide for novel literature review. This study presents a review on the effects that zinc oxide multilayered composite coatings have on the mechanical properties of mild steels. These mechanical properties include hardness, corrosion resistance, wear resistance, impact strength, tensile strength, and flexural strength. It was reported by various researchers that coating with multilayered composite of zinc oxide gave a better result as compared to coating with Zinc alone. From the literature studied, it was noticed that more work is still required to identify and use more natural products as constituents of these multilayered composite.
Journal of Physics: Conference Series
Engineering is increasingly becoming a more popular career for women globally. This study aims at... more Engineering is increasingly becoming a more popular career for women globally. This study aims at examining the performances of female students in comparison to their male counterparts. This is then used to determine if there is any correlation in their performances. The sample population for this research is the engineering students in Covenant University, a leading University in Nigeria. The performance of the graduating students in this school over 11 years, from 2006 to 2017, was analysed and studied. The research suggests that more percentage of female students now graduate with first class and the percentage of female students graduating with third class between these periods has reduced to almost nothing over years. Thus, it is recommended that more women should be encouraged to enrol in engineering courses, as they tend to thrive in courses such as Electrical and Electronics Engineering and Mechanical Engineering.
Journal of Physics: Conference Series
Journal of Physics: Conference Series
AIP Conference Proceedings
Carburization is one the best heat treatment that responded well to hardening with Palm Kernel Sh... more Carburization is one the best heat treatment that responded well to hardening with Palm Kernel Shell giving the best hardness value. This work studied the influence of carburization on HSStool(ASTM A600) and its behaviour during machining of mild steel (ASTM A36). Composition of the samples (12 pieces of 180 x 12 x12 mm) HSS tools were checked using UV-VIS spectrometer and the tools were carburized with PKS at holding temperatures and time of 800, 850, 900,950 o C and 60,90 120 minutes using muffle furnance. The micro structural analysis, surface and core hardnessof the treated samples gave better results than the untreated samples when checked withsoft driven and optical microscope. It wasalso observed that increase in the feed rate and depth for length of cut of 50 mm significantly reduces the wear progression and thereby gave best machining time at maximum carburizing temperature and time(950 o C / 120 minutes) when it was used to cut mild steelon the lathe machine.
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Papers by Oluwabunmi P . Abioye