Abstract
A series of creep ageing tests under different temperatures and stresses have been designed to characterize the creep aging behavior of 2124 Al alloy,and the microstructure and properties of the samples in the interrupted tests have been observed.On the basis of the experimental results, combining the creep mechanism and age strengthening theory,a unified constitutive model has been developed for creep age forming of 2124 Al alloy.The constitutive relations,aging strengthening effect and the microstructure are closely correlated in the model,which could be suitable for different ageing temperatures and stress levels.Finally,the model has been used to predict the creep strain curves of added creep aging tests with different temperature,the computed results tally well with the experimental data.
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