A model for the age hardening response in 7475 aluminium alloy has bee
n developed that describes the effect of two step aging treatments and
the effect of deformation on the kinetics of aging. The model describ
es the essence of the experimental observations on the alloy subjected
to deformation before artificial aging, i.e. the occurrence of the pe
ak stress at shorter times, the acceleration of the kinetics of overag
ing, and the change in the relative yield stresses between the alloy w
ith and without deformation during aging. (C) 1997 The Institute of Ma
terials.