الفهرس 
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Abstract
The conventional recycling method of aluminum by melting the scraps or the
chips is causing environmental problems, material losses, and energy resources
depletion. This thesis aims to present an eco-friendly recycling technique for the
aluminum alloy AA2011. This method is known as solid-state recycling.
The chips obtained from the turning operation were collected, compacted into
billets, and hot extruded. Experiments were planned according to the design of
experiments (DOE) approach. The hot extrusion parameters were temperature and
ratio. Regression analysis (RA) and analysis of variance (ANOVA) were conducted,
and significant mathematical models were obtained. The adopted equations
demonstrated the effect of the hot extrusion parameters on the ultimate tensile strength
and the yield strength of the extrudates.
The results showed that the extrusion temperature and the extrusion ratio
significantly influenced the tensile and yield strengths of the samples. An
Optimization process was carried out to maximize the abovementioned mechanical
properties of the extrudates. Moreover, Hot rolling was performed on the extruded
sample having the highest mechanical properties. Metallographic analysis was also
performed to study the bonding quality between the chips after each of the hot
extrusion and the hot rolling processes.