Formability of AA6082-T6 at Warm and Hot Stamping Conditions

Abstract

Forming limit diagrams (FLDs) of AA6082 at warm/hot stamping conditions were determined by using a specially designed test rig. The tests were carried out at various temperatures from 300 to 450°C and forming speeds ranging from 75 to 400 mm/s. The strain was visualized and measured using ARGUS software provided by GOM. The results clearly show that the formability of AA6082-T6 sheet metal, in terms of the limit major strain, increased by 38.9 % when the forming temperature was increased from 300°C to 450°C at a speed of 250 mm/s, and increased by 42.4 % when the forming speed was decreased from 400 to 75 mm/s at a temperature of 400°C. It was verified that hot stamping is a promising technology for manufacturing complex-shaped components.

Effect of Tool Speed when Joining Dissimilar Materials by Flowdrill Technology

“…Additional deformation mechanisms involved with dislocations become activated at elevated temperatures. Increased dislocation mobility may also lead to increased dislocation annihilation and enhanced plastic strain [19]. At temperatures ranging from 100°C to 500°C, the alloy overages and loses its strength.…”

Transition of failure mode in hot stamping of AA6082 tailor welded blanks

“…To determine the forming limit strains of AA6082 at elevated temperature, formability tests were conducted at temperature ranging from 300 to 450˚C, and at forming speeds of 75, 250 and 400 mm/s. Detailed experimental work is also reported in reference (Luan et al, 2016).…”

“…The FLDs of AA6082 at high temperatures (300 to 450°C) and various forming speeds (75 to 400 mm/s) have been reported in reference (Luan et al, 2016). Generally, the formability, in terms of limit strain, increases with temperature or strain rate.…”

Studies on the Hot Forming and Cold-Die Quenching of AA6082 Tailor Welded Blanks

“…where is the initial value of the imperfect factor, determined by calibrating against the forming limit curves (FLCs) obtained from the formability tests [8].…”

“…where 0 is the initial value of the imperfect factor, determined by calibrating against the forming limit curves (FLCs) obtained from the formability tests [7]. The different points along the FLCs representing different strain conditions were calculated by varying the ratio between the minor and major strains in zone A.…”