Optimization of Squeeze Casting Parameters for Aluminium Alloy Using Taguchi Method

This study applies the Taguchi method to investigate the relationship between the process variables, hardness and ultimate tensile strength in a squeeze casting aluminium alloy. The effects of various casting parameters including squeeze pressure, pressure duration, pouring temperature and initial die temperature were studied. The results showed that the process parameters had statistical significance on all properties at 95 % confidence level. Combined interactions of these parameters also presented significant effects on the property responses. Combined optimum setting for process factors as regards hardness and ultimate tensile strength were evaluated as 150MPa, 15seconds, 700oC and 150oC for squeeze pressure, pressure duration, pouring temperature and initial die temperature respectively. The results obtained for the three responses which are hardness and ultimate tensile strength, were 166 and 347.72MPa respectively. The experimental results show that the squeeze pressure significantly affects the microstructure and the mechanical properties of aluminium alloy (Al-12%Si).