Abstract Warm Deep Drawing process of circular 0.8 mm thick specimens in AA5754-O was investigated using a home designed experimental equipment and a finite element fully coupled thermo-mechanical model. The research activity was aimed to investigate the formability (evaluated by means of the material Limit Drawing Ratio) of the AA5754-O by means of experimental tests supported by numerical analysis. The following process parameters were taken into account: the temperature level of the blank in the centre of the specimen and the forming speed; in addition standard grease lubricant was used. The LDR when adopting different levels of such process parameters was obtained; in particular tests highlighted optimal values when setting the temperature in the blank centre at 110 °C. The stress and strain state in the material section was calculated; the material yield condition was modelled using the isotropic Von Mises criterion, while the Al flow stress was described by the physically based Bergstrom model.
[1]
Giuseppina Ambrogio,et al.
Enhancing LDR In Deep Drawing By Superimposing Thermal Gradients
,
2004
.
[2]
A. H. van den Boogaard,et al.
Warm Deep Drawing of Aluminium Sheet
,
2003
.
[3]
Tetsuo Naka,et al.
The effects of temperature and forming speed on the forming limit diagram for type 5083 aluminum-magnesium alloy sheet
,
2001
.
[4]
G. Cosovici,et al.
FLD theoretical model using a new anisotropic yield criterion
,
2004
.
[5]
P. Rozier,et al.
Feasibility of warm drawing of aluminium products
,
2001
.
[6]
J. Huétink,et al.
Modelling of aluminium sheet forming at elevated temperatures
,
2004
.
[7]
Young Hoon Moon,et al.
Tool temperature control to increase the deep drawability of aluminum 1050 sheet
,
2001
.