Özet:

Modelling of process parameters and its validation in Aluninium production industries poses great challenges in the production of Aluminium sheets in Aluminium Manufacturing companies. This research therefore focused on the modelling and validation of production parameters of unalloyed Aluminium sheets in Aluminium manufacturing industries. The process parameters investigated were temperature (T), pressure (P) and percentage by volume of Aluminium (Ap) used. The effects of these process parameters on the mechanical properties of the developed unalloyed Aluminium sheets were modelled to ease Aluminium manufacturing processes in Aluminium industries. From the plots obtained, it was observed that the optimal tensile strength, young modulus of elasticity, shear modulus and Brinell hardness number were 621MPa, 69GPa, 25.5GPa, and 61 at temperature of 1921°C, 1610°C, 1442°C and 1800°C respectively. In comparison with pressure, the obtained values for optimal tensile strength, young modulus of elasticity, shear modulus and Brinell Hardness Number were 562MPa, 68GPa, 26.2GPa and 61 at pressure of 72GPa, 69.5GPa, 69.5GPa and 69.5GPa respectively. Moreover, empirical Models were also developed for predicting the mechanical properties such as tensile strength, young modulus of elasticity, shear modulus and hardness for the produced unalloyed Aluminium sheets. The models were validated using coefficient of determination (R2) and mean absolute percentage error (MAPE). The coefficient of determination (R2) obtained ranges from 0.9213 (92.13%) to 0.9911 (99.11%) which indicates that a substantial good fit was achieved by the regression models developed. The mean absolute percentage error of the developed models also ranges from 0.46% to 3.38% which was below 10% recommended. The values obtained from the validation of these models were therefore found to be satisfactory, and shows good predictability of the model and its adequacy. Finally, the results obtained show that temperature and pressure had great effects on the mechanical properties of the produced unalloyed Aluminium sheets.

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