EFFECT OF COMPOSITION ON CRYSTALLOGRAPHIC TEXTURE OF HOT-ROLLED AL-LIBINARY-ALLOYS

A series of binary Al-Li alloys were identically hot rolled to study t he effects of composition on texture. It was observed that at low Li l evels (less than 2 wt.% Li) the alloys tend to be dynamically recrysta llized, which gives rise to primary Goss and secondary Cube texture co mponents. Alloys with higher Li levels (greater than 2 wt.% Li) develo ped a beta fiber texture with maximum intensity at near-Brass location . The transition between the texture types coincided with the start of the formation of delta precipitates during rolling. An increase in th e volume fraction of these precipitates reduced the overall texture in tensity. The changes in texture resulted in a decrease in the yield st rength anisotropy in alloys with 2-3 wt.% Li. This trend agrees qualit atively with the changes in Taylor factors calculated from texture.