By: E. O. Ajoge and Musa James
1Researcher, Centre for Energy Research and Development, Obafemi Awolowo University, Osun, Nigeria.
2Researcher, Centre for Space Transport and Propulsion, Lagos, Nigeria.
This study elucidates how local cooling agents, such as coconut oil and jatropha oil, influence the mechanical characteristics of heat-treated mild steel. Tensile testing, Brinell hardness testing, and microstructural analysis were conducted on both heat-treated and untreated samples. The results show observable differences in the heat-treated materials’ mechanical characteristics. Specifically, the yield strength increased across all quenched media, while the ultimate tensile strength decreased for samples cooled with coconut oil (594.865 MPa) and water (585.292 MPa) compared to untreated samples. Various quenching media yield diverse microstructures that directly impact mechanical properties. Enhanced ductility was observed in most heat-treated samples, except for those cooled with water (20.22), which exhibited decreased ductility compared to untreated samples. Additionally, hardness improved in all heat-treated samples, except for those cooled with water (57.218 BHN), which showed decreased hardness compared to untreated samples. Moreover, microstructural analysis was solely conducted on the untreated sample, laying the groundwork for future experimental analysis.
Citation:
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