A model for the age hardening response in 7475 aluminium alloy has been developed that describes the effect of two step aging treatments and the effect of deformation on the kinetics of aging. The model describes the essence of the experimental observations on the alloy subjected to deformation before artificial aging, i.e. the occurrence of the peak stress at shorter times, the acceleration of the kinetics of overaging, and the change in the relative yield stresses between the alloy with and without deformation during aging.
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