Effect of superimposed pressure on the fracture behaviour of aluminum automotive alloys

The tensile fracture of AA 5754, and AA 6111 alloys has been examined with respect to iron based inclusion content, heat treatment and stress state. For 5754 alloys, a transition in the appearance of failure from cup and cone to void sheeting was observed with increasing iron content. In these alloys, testing under superimposed hydrostatic pressure changes the fracture mode of the high iron alloy to ductile rupture in which the sample necked to …