Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-247-C7-250
Strain hardening of aluminium alloy 3004 in the deep drawing and ironing processesJ. COURBON1 and J.L. DUVAL2
1 Pechiney CRV, BP. 27, 38340 Voreppe, France
2 Laboratoire des Propriétés Mécaniques et Thermodynamiques des Matériaux (LPMTM-CNRS), Univ. Paris-Nord, avenue J.B. Clément, 93430 Villetaneuse, France
The evolution of material hardening resulting from the canmaking operations on aluminium beverage cans has been investigated. Tensile tests in cup walls revealed that deep drawing induced softening in the hoop direction and hardening in the meridian direction. This anisotropy is retained in the ironing operation. Changes in strain path on a heavily cold-rolled material probably cause such a complex behaviour. To determine hardening laws for deep drawing, simple shear tests were thus performed because of the strain path similarity. They allowed to determine hardening laws over larger strains than tension could reach and revealed a saturation of stress. Altogether they proved adapted to the understanding of deep drawing.
© EDP Sciences 1993