Author
Abstract
The aging kinetics and the coupling between plastic deformation and
subsequent aging on a set of Al-Zn-Mg alloys having different Zn-content
(6.33%, 7%, 7.5% and 8%) are investigated. These alloys are produced with
an extreme care during melting, alloying and sampling where the best
conditions of alloying are adopted .The response to multi thermomechanical
treatments practices are reported, where the combination between rolling
practice and aging is monitored by hardness measurements, tensile, impact
toughness measurements in addition to x-ray diffraction testing. The study
proves that, the zinc percent has a very important role in the precipitation
hardening sequence of tested alloy; this effect is concentrated on the speeding
up the kinetics of hardening by increasing the density and stability of GP
zones and μ'-phase.
)
