Papers by Author: S. Cao

Abstract: Using AA5182 and 5754 aluminum alloys, the role of friction in through-thickness evolution was demonstrated. Aside from the mechanical parameters such as roll gap geometry and coefficient of friction, the significance of the role of Fe solute in the matrix was revealed.

Abstract: Predictions of chromium additions to aluminum alloys to stabilize the deformation debris products were examined. Additions of 0.22 wt. % Cr to AA6063 extrusion alloys manifested enhanced formability under bending and precision-strain-rate-sensitivity tensile testing indicated that the stacking fault energy was reduced. The debris products were more resistant to dynamic recovery resulting in enhanced ductility at 27 °C and the solute-drag effect of Mg was dramatically manifested in the Haasen plot.