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INFLUENCE OF PROCESS PARAMETERS ON THE MECHANICAL PROPERTIES OF HEAT TREATED ALUMINIUM COPPER MAGNESIUM ALLOY

The current study obtained contributions of individual process factors and optimal factors for hardness and UTS, in the heat treatment process of Al-Cu-Mg alloys, every factor such as Mg content, solution temperature, aging temperature and pre-aging time, has three levels, respectively. The standard experiment layout 3 level orthogonal array (OA) L9 was considered. The interaction between the parameters was neglected. Solutionization is conducted at a temperature high enough to put in solution the alloying elements and obtain a supersaturated solid solution, which, in the case of Cu and Mg, is normally at 510 to 550°C. This is the typically know as the "solution temperature". In recent times, the forming of various automobile body panel parts often involved the application of various temperature 170 °C, 180 °C and 190 °C of ageing which in turn would influence the ageing characteristics of the alloy. Taguchi method puts emphasis on S/N ratio as opposed to simple average of output. Analysis of Variance was used to investigate percentage Contribution of Each process parameters on output Response. Results show that parameters such as % Magnesium addition and ageing duration has significant effect on mechanical properties