An Investigation into Hot Deformation Resistance of an AA5083 Alloy

摘要

Quantitative assessments were made over the effects of temperature, work hardening behavior and strain rate sensitivity for an AA5083 alloy using true stress-strain data derived from the friction-free tensile test. Formulae in the forms of a hyperbolic sine equation as well as a combined effect of temperature, strain and strain rate have been constructed for the alloy. The experimental data were well explained by the hyperbolic sine equation using the measured activation energy for hot deformation. It was found that peak strain plays a decisive role on the accuracy of a numerical approach to the work hardening behavior. Through the application of the present formulae, deviations between the calculated and the measured rolling force during hot rolling were largely suppressed and the mass productions of AA5083 alloy plates with superior dimensional precision in the hot rolling mill at CS aluminum have been successfully achieved.