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Articles by G.O. Oluwadare
Total Records ( 3 ) for G.O. Oluwadare
  G.O. Oluwadare and O. Agbaje
  The corrosion of two types of construction steels, ST60Mn and RST37-2, in a low cyanide concentration environment (cassava juice) and embedded in concrete had been studied. The ST60 Mn was found to be more corrosion resistant in both ordinary water and the cassava juice environment. The cyanide in cassava juice does not attack the steel but it provides an environment of lower pH around the steel in the concrete which leads to breakdown of the passivating film provided by hydroxyl ions from cement. Other factors such as the curing time of the concrete also affect the corrosion rates of the steel in the concrete. The corrosion rate of the steel directly exposed to cassava juice i.e., steel not embedded in concrete is about twice that in concrete. Long exposure of concrete structure to cassava processing effluent might result in deterioration of such structures. Careful attention should therefore be paid to disposal of cassava processing effluents, especially in a country like Nigeria where such processing is now on the increase.
  G.O. Oluwadare and P.O. Atanda
  In this study, the effect of processing parameters such as alloy composition and shake-out time on the microstructure and subsequently the mechanical properties of brake drums to the specification of an automobile company had been studied. The results show that processing parameters such as alloy composition (Silicon and Carbon contents) affect the quantity and morphology of the carbides formed while shakeout time affects the size of the carbide. When all other parameters are kept constant, shakeout time of a casting to obtain desired properties can be predicted using a relationship derived from multiple regression analysis in this study work. The relationship is: Shake-out time = -13.8+0.0799Si+6.954GS+0.0467 Hardness.
  A.O. Odukwe , O.O. Ajayi and G.O. Oluwadare
  This research used the stress intensity factor with rate of crack growth per cycle of loading to model and simulates the crack growth in Martensitic steel in air environment. The basic parameters used were da/dN and ΔK, log (da/dN) was analyzed against log (ΔK) and a regression analysis using data from log (da/dN) vs log (ΔK) was carried out and the outcome employed to develop a model and simulation which gave rise to interactive software that can be used to predict the behavior of a structural member under conditions of certain loading. Additionally, it can be employed to have quick access to data and design considerations, when input data are supplied. This became useful in monitoring the point at which crack can initiate and the rate at which it would grow in a particular structural member of interest. The software has been tested with theoretical and experimental data.
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