TY - JOUR
T1 - Deformation modeling of superplastic AA-5083
AU - Khaleel, M. A.
AU - Johnson, K. I.
AU - Hamilton, C. H.
AU - Smith, M. T.
PY - 1998
Y1 - 1998
N2 - The superplastic deformation characteristics of a modified aluminum alloy were investigated at temperature range from 500 to 550°C. The alloy chemical composition was 4.69% Mg, 1.56% Mn, 0.177% Cr, 0.03% Si, and 0.07% Fe by weight. Total tensile elongations as high as 750% were observed at lower strain rates. A non-isothermal constitutive equation, that includes the evolution of grain size, was established and implemented in a finite element code. Numerical simulations of the uniaxial tension specimen were performed, and good agreement between the testing and the modeling results was obtained. A pressure control algorithm for the blow forming model was developed based on an averaging scheme that considered a subset of finite elements with the highest strain rate. A pressure history was generated from the finite element simulations for a constant target strain rate of 1 × 10-3s-1. When these pressure histories were used in tray forming experiments, good agreement was obtained between the forming and modeling results.
AB - The superplastic deformation characteristics of a modified aluminum alloy were investigated at temperature range from 500 to 550°C. The alloy chemical composition was 4.69% Mg, 1.56% Mn, 0.177% Cr, 0.03% Si, and 0.07% Fe by weight. Total tensile elongations as high as 750% were observed at lower strain rates. A non-isothermal constitutive equation, that includes the evolution of grain size, was established and implemented in a finite element code. Numerical simulations of the uniaxial tension specimen were performed, and good agreement between the testing and the modeling results was obtained. A pressure control algorithm for the blow forming model was developed based on an averaging scheme that considered a subset of finite elements with the highest strain rate. A pressure history was generated from the finite element simulations for a constant target strain rate of 1 × 10-3s-1. When these pressure histories were used in tray forming experiments, good agreement was obtained between the forming and modeling results.
UR - http://www.scopus.com/inward/record.url?scp=0032274850&partnerID=8YFLogxK
U2 - 10.1016/S0749-6419(98)00051-5
DO - 10.1016/S0749-6419(98)00051-5
M3 - Article
AN - SCOPUS:0032274850
SN - 0749-6419
VL - 14
SP - 1133
EP - 1154
JO - International Journal of Plasticity
JF - International Journal of Plasticity
IS - 10-11
ER -