Effect of composition on crystallographic texture of hot-rolled AlLi binary alloys

Abstract

A series of binary AlLi alloys were identically hot rolled to study the effects of composition on texture. It was observed that at low Li levels (less than 2 wt.% Li) the alloys tend to be dynamically recrystallized, which gives rise to primary Goss and secondary Cube texture components. Alloys with higher Li levels (greater than 2 wt.% Li) developed at β fiber texture with maximum intensity at near-Brass location. The transition between the texture types coincided with the start of the formation of δ precipitates during rolling. An increase in the volume fraction of these precipitates reduced the overall texture intensity. The changes in texture resulted in a decrease in the yield strength anisotropy in alloys with 2–3 wt.% Li. This trend agrees qualitatively with the changes in Taylor factors calculated from texture.