Browsing by Author "Kareem, Mutiu"

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    DEVELOPMENT AND CHARACTERIZATION OF MODELING DEFORMATION OF AL-CU ALLOY
    (Materials Science and Technology (MS&T) 2014, 2014-10-16) Adegbola, Adekunle A.; Olapade, Julius; Alabi, Ismaila O.; Ghazali, Akeem; Ekundayo, Emmanuel; Fashina, Olugbenga; Kareem, Mutiu; Olaniyan, Abolade; Oke, David
    The development and morphology of Al-9.37Cu alloy was characterized through metallographic examination and failure rate. The alloy was obtained by employing Die -Casting Technique before being subjected to series of mechanical and materials tests. The result showed that the strength of Al9.37Cu was greatly enhanced when the alloy was under different percent of deformations between 5-15%. Constitutive model was adopted to determine the isotropic material property in which the plane stress and plain strain conditions were considered as boundary conditions. Consequently, the effect of temperature was able to influence the strain rate in which the fracture strain determined the failure rate of the Al-Cu alloy.
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    EFFECTS OF THERMOMECHANICAL TREATMENTS ON THE CHEMICAL AND MECHANICAL PROPERTIES OF Al-Cu Alloy
    (International Journal of Materials, Methods and Technologies, 2014-01-20) Adegbola, Adekunle A.; Olapade, Julius; Aderonmu, Mudasiru; Salawu, Ismaila; Alabi, Ismaila O.; Kareem, Mutiu; Omotoyinbo, Joseph A.; Olaniran, Oladayo
    The development of Al-9.37Cu alloy was characterized through metallographic examinations. The alloy having been cast using Die –Casting method was subjected to series of treatment such as solution treatment, water quenching and air-quenching as well as over –ageing. The result showed that the strength of Al9.37Cu was greatly enhanced when the alloy was rolled, and aged. This was as a result of the growth of large precipitates along and near the Aluminum grain boundaries which interfere with the movement of dislocations when the metal yields. However, when the alloy was heated beyond 200oC (500oC), the tensile values were observed to decline as a result of equilibrium tetragonal phase which is fully in –coherent and was characterized with low strengthening effect due to fibrous structures.
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    SIMULATION AND MODELING OF A CARBURIZING PROCESS USING VARIABLES FOR EFFECTIVE PERFORMANCE IN SERVICE IN AISI 1032 STEEL
    (The American Ceramic Society, 2015) Adegbola, Adekunle; Akeem, Ghazali; Alabi, Ismaila; Kareem, Mutiu
    The mechanical properties of AISI 1032 steel samples carburized in Wood Charcoal and Snail Shell were investigated. The samples were modeled and simulated using Fick’s law and C++, in order to evaluate the performances of solid carburizing media on the mechanical properties of steels at different conditions. The results revealed that the case depth, tensile strength and hardness values of samples carburized with Wood Charcoal (WChl) are higher compared to those carburized with Snail Shell (SS) at 800 0C and 950 0C respectively. These were evidently substantiated with their micrographs as observed under DV-500 Version 10.2 Metallurgical Microscope with X500 magnification. The case-depth is directly proportional to the carburized temperature and time. It was concluded that Fick’s law is good at predicting the diffusion of carbon in steels.