(UNIVERSITE DE ECHAHID CHEIKH LARBI TEBESSI, 2026-06-08) Islem ABBAS / Encadré par Abdallah DIHA
This work investigates the influence of heat treatment on the recovery and
recrystallisation behaviour of cold-drawn commercially pure aluminum wires,
manufactured by the national cable enterprise EN.I.CA.B, Biskra. The wires were
cold-drawn from an initial machine wire diameter of 9.5 mm to three final diameters:
5.92 mm, 4.24 mm, and 3.33 mm, corresponding to area reduction ratios of 61.17%,
80.08%, and 87.72%, respectively. Two annealing treatments were applied: a
recovery annealing at 160°C for 90 minutes, and a recrystallisation annealing at
290°C for 60 minutes. The characterization techniques employed include tensile
testing, Vickers microhardness measurements, and optical microscopy. The results
indicate that recovery annealing induces a slight decrease in hardness through
dislocation rearrangement and partial annihilation, without altering the grain
structure. Recrystallisation annealing, on the other hand, leads to a significant
reduction in mechanical strength and the formation of new strain-free equiaxed
grains, resulting in a marked improvement in ductility.
