Effects of aluminum on the cold-rolled textures of titanium

Properties of Textured Titanium Alloys

“…Additions of aluminum, an alpha stabilizer, caused the basal pole to move toward the sheet normal, producing an ideal or (00011 [ 1 Ol 0] type texture similar to that observed by Sparks et al (Figure 8) [46] Thornburg [49,50] also studied the influence of aluminum additions and found essentially the same results. He found that the texture typical of commercially pure titanium changed to an ideal or basal texture suddenly at a given percent reduction and an aluminum concentration of >2.0 percent.…”

“…The effect of solid-solution alloying elements has been studied by McHargue et al, [45,46] and it has been found that columbium (<3.6 wt %), tantalum (<15,4 wt %), and zirconium (<14.7 wt %) have very little effect upon the cold-rolled texture of titanium. [47] On the other hand, aluminum (""4.0 wt %) reduces the tilt of the basal planes toward the transverse direction and produces a texture which may be described as ideal, or (0001) [10l0] [46] (see Figure 8).…”

“…For alloy additions of molybdenum, vanadium, and columbium, the beta-isomorphous stabilizers, texture changes that occurred were similar to those in the beta-stabilized eutectoid alloys described in the previous section. [ 46]…”

“…Thus, a basal-pole figure is sufficient to define the crystallographic influ•mce, and the above texture can be modified by either hot ro'ling [56] (above 1400 F but not above beta transus) and 'or alloying. Important observations in relation to texture strengthening were that additions of approximately 4 percent aluminum [45,46] (an early discovery) and approximately 0.5 percent copper (the most recent disclosure: produce the "ideal" texture. [48] It has also been established that the ideal texture can be produced by round rolling.…”