摘要：Summary In this study, approach of design of experiment has been employed to establish the statistical correlation amongst the parameters of artificial ageing, i.e., time of ageing (t A ) and temperature of ageing (T A ), and the ageing response, as measured by the variation of hardness for an Al–Mg–Si alloy. The results related to the main effect of the parameters of ageing obtained via linear statistical analyses indicate that t A is more effective than the T A to achieve the higher level of hardness specifically when T A is beyond 203°C. Following a second order non-linear relationship, a 3-D correlation between t A , T A and hardness value has been established and a contour plot has been constructed which can be used for the selection of ageing parameters to obtain a pre-determined level of mechanical property.
关键词：Design of experiments; Hardness; Al alloy; Statistical analysis; Artificial ageing;
