摘要
The tensile properties of an Al3.2Cu1.6Li1.1Mg0.3Zr alloy with different cold rolling before peak aging were studied. The strength of the material reaches a maximum with a moderate reduction in thickness by rolling. For heavily cold rolled and aged alloy, when tensile tested in the transverse direction, both the strength and elongation are higher than in the longitudinal direction. When tested in the longitudinal direction, two sets of shear bands formed in the specimen and wedge type tensile fractures were observed to occur along the shear bands irrespective of the change in width/thickness ratio of the specimens. When tested in the transverse direction, the fracture was intergranular "woody" type, and no shear bands were observed. An explanation based on the assumption of the {110} 〈001〉 texture development in the alloy with the rolling operation was given to rationalize satisfactorily all the observations in this study. © 1986.