Texture and anisotropy of Ti-22Al-23Nb foil

The texture and anisotropy of as-rolled and rolled and annealed Ti-22Al-23N b foil have been investigated. The texture of the b.c.c. phase was analyzed and used to calculate the anisotropy of the foil. The predicted variation in yield stress is in good agreement with the experimental results. The tex ture of the b.c.c, phase is similar to textures observed in conventional b. c.c. alloys. The texture of the orthorhombic and hexagonal phases has also been analyzed. Although limited data exist for the single crystal propertie s of the alpha phase, prediction of the anisotropy of the orthorhombic phas e is hindered by the absence of such data. The results to date indicate tha t the texture of the cubic phase predicts the anisotropy of the intermetall ic foil reasonably well. Theoretical analysis of the single crystal yield s urface of the orthorhombic phase shows that a deformation mode map can be c onstructed for this material. Comparison of simulated with experimental tex tures suggest limits on the variation of critical resolved sheer stress amo ng the four different slip systems. (C) 1998 Elsevier Science S.A. All righ ts reserved.